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October 25, 2014

Search: polymer-Crosslinking Chemistry

Number of results: 46,078

polymer-Crosslinking Chemistry
Explain why a polymer such as polybutadiene can be cross-linked, however a polymer such as polyethylene cannot be cross-linked. Make reference to what it is about the chemistry of the repeating units that allows for the formation of cross-links.
December 29, 2012 by Anonymous

Chemistry
How is the water drawn into the polymer? How is the polymer held in the polymer? What are the intermolecular bonds between the polymer and the water? A diagram again may help. What factors affect the effectiveness of SAP?
June 4, 2012 by Anushka Sharma

polymer science
its possible to convert the commercial polymer into nano polymer and its affact any property of polymer
February 16, 2011 by pradee

polymer science
its possible to convert the commercial polymer into nano polymer and its affact any property of polymer
February 16, 2011 by pradee

polymer science
how the strength polymer need for polymer electrolyte prepatation
December 16, 2010 by pradee

Chemistry
In polymer chemistry, it is often said that obtaining a polymer with certain desired physical properties is often more a problem of engineering than of chemistry. Why is this the case? bgfhftghgfgfnhgf
September 29, 2006 by Lindz

organic chemistry
what characteristics must a molecule have to be part of a) a condensation polymer b) a addition polymer
March 20, 2009 by Chelsea

Chemistry
In polymer chemistry, it is often said that obtaining a polymer with certain desired physical properties is often more a problem of engineering than of chemistry. Why is this the case?
September 28, 2006 by Lindz

Chemistry
In chemistry, how is a monomer related to a polymer? Think of a chain: Each link is a monometer, as the links are joined, you have a chain which represents the polymer.
July 16, 2007 by Winry

polymerization of alchohol
CH2=CH-CH-OH | CH3 when the above compound undergo polymerizaing What is the polymer and the structure of the polymer obtained drawing should show three monomer unit. also include what type of polymerization involved in forming this polymer
March 1, 2007 by bonita

chemistry
I submitted this question earlier... can anyone help me pls. This question is about the polymer made by polymerizing this compound: _ CH2=CH-CH-OH _ | _ CH3 Please identify the monomer unit - there should be 3... also, what type of polymerization is involved in forming this ...
February 5, 2007 by david

Chemistry
In the laboratory exercise "Preperation and Properties of Polymers", polyvinyl alcohol is dissolved in water and then reacted with borax (Na2B4O7·10H2O) in water. Which of the following are expected results of this reaction? True or False? 1. Polyvinyl alcohol became graft ...
April 22, 2011 by Chem

chemistry
This question is about the polymer made by polymerizing this compound: CH2=CH-CH-OH | CH Please identify the monomer unit - there should be 3... also, what type of polymerization is involved in forming this polymer? sorry - the compound is.... CH2=CH-CH-OH ________| _______CH3
February 5, 2007 by david

Chemistry
I have one more question DrBob, I have draw a structure of this polymer CH2=CH-CH-OH ' CH3 and identify the monomer units. Would the mononer unit be this: CH2-CH-CH-O ' CH3 AND WOULD THIS POLYMERIZATION BE A CONDENSATION TYPE? Paula--I am not an organic chemist but this doesn'...
February 20, 2007 by Paula

Chemistry 2
In a study designed to prepare new gasoline resistant coatings, a polymer chemist dissolves 6.053g of poly in enough water to make 100.0 mL of solution. At 25C, the osmotic pressure of this solution is 0.272 atm. What is the molar mass of the polymer sample?
March 26, 2010 by Mike

polymer science
how can we get copolymer from polymer give the reaction condition and how can its possible and the equation for the copolymerization.
December 4, 2010 by pradee

CHEMISTRY: polymers
Polymethylpentene are there any safety concerns, toxicity concerns about the polymer? any environmently concerns? is the monomer toxic, is the polymer toxic?
April 4, 2009 by Brad

Material science/ Mechanics
A cube polymer matrix is subjected to elastic deformation in compression by 10 N applied force. The cube is deformed by 20% of its original shape. The cube side has a length of 1 m. If you assume that the polymer has the intrinsic properties of rubber, find the storage shear ...
September 8, 2013 by Katy

chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at 10...
June 1, 2013 by Anony mous

chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at 10...
June 1, 2013 by Anony mous

chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at ...
May 31, 2013 by Anonymous

Chemistry
a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at...
June 2, 2013 by Anon

Chemistry
a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 in the polymer at...
June 2, 2013 by Anon

Chemistry
Is Amylose different than Amylopectin in that Amylose is a polymer of a-D-glucose but amylopectin is a polymer of b-D-glucose? Thanks for any help offered. Carbohydrates that are called reducing sugars are those that__ a. have OH groups that are easily oxidized. b. form ...
August 9, 2010 by Bobby

Honors Chemistry
"Would it be possible to have an addition polymer synthesized from a monomer that has only single bonds? Why or why not?" ==> I know that an addition polymer can only be synthesized from a monomer that has double bonds, but my textbook did not explain why. Can someone ...
May 20, 2010 by Emily

chemistry
Is the ritalin molecule a polymer?
November 5, 2010 by Alex

chemistry
What is the monomer and polymer structure of DNA?
May 23, 2014 by Liz

polymer science
inhibiters are to the monomer for the polymer preparation we need to remove the inhibiters how can remove the inhibiters
November 14, 2010 by prade

chemistry - pick a polymer
I need to pick a polymer for my science project. It has to be organic and preferably simple. Some that are already taken are: polyethene, polystyrene, PVC, polyacrylonitrile, DDT , nylon.. Thanks a lot it has been really hard for me to find something. I don't know if you must ...
September 26, 2006 by Annie

chemistry
Define the term 'polymer' and then name two examples of naturally occurring polymers.
May 19, 2009 by Coco

chemistry
Draw three repeating units of the condensation polymer made from ethanedioic acid and ethanediol.
May 11, 2008 by Lindsey

Chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x ...
January 12, 2013 by Ankur

chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x ...
January 12, 2013 by Anonychem

chemistry
How do we calculate the Xi column when trying to find the molecular weight for polymer. I am given several ranges and means for each
February 28, 2012 by Ms. Sue please help

chemistry
please can u help i need to a structure of a polymer and i dentify the monomer unit and include three monomer units,from the compound CH2=CH-CH-OH CH3 AND STATE THE POLYMERIZATION INVOLVED IN FORMING THE POLYMER,please help i have tried ,but i cant make head nor tail of it The...
March 6, 2007 by jane

chemistry
the average molar mass of polyethylene when 4.40 g of the polymer is dissolved in benzene to produce 200.0 mL of solution and the osmotic pressure is found to be ...
April 2, 2012 by Anonymous

chemistry
Draw three repeating units of the condensation polymer made from ethanedioic acid and ethanediol. if anyone has a weblink that illustrates this may you please send it?
May 9, 2008 by Mable

Chemistry Biological Compounds
Can you help me with these questions Directions: Either it's a protein, nucleic acid, carboydrate, or a lipid 1.Plymers formed from amino acids I2. s a polymer
February 4, 2009 by Kimy

Chemistry
Could anyone tell me what the structure of this polymer is ( I need to draw it), I also need to identify three monomer units, CH2 = CH - CH - OH ( CH3 Thanks
February 19, 2007 by Ben

Chem
CH2 = CH - CH - OH ............| ...........CH3 Draw the structure of this polymer and identify the monomer unit. Should show three monomer unit State the type of polymerization involved in forming this polymer Hi Lacey, do you know the answers for part a, of question 5 at all...
March 12, 2007 by Lacey

chemistry
(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....
January 11, 2013 by schoolgirl

Chemistry
(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....
January 11, 2013 by Ling

chemistry
find the average molar mass of polyethylene when 4.40 g of the polymer is dissolved in benzene to produce 200.0 mL of solution and the osmotic pressure is found to be7.60 torr ant 25 celcious Degree.
April 2, 2012 by Anonymous

Chemistry
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x...
January 11, 2013 by selly

chemistry
(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....
January 12, 2013 by ani

Chemistry
(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....
January 12, 2013 by markus

CHEMISTRY
(a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6....
January 13, 2013 by ani

chemistry
1. If a gaseous sample contains 73% N2 by volume, what is the solubility of N2 in water at 25°C and 1.0 atm (kH in H2O at 25°C = 7.0 10-4 mol/Latm)? 2. Calculate the vapor pressure of a solution of 0.60 mol of cholesterol in 4.5 mol of toluene at 32°C. Pure toluene has a vapor...
January 31, 2011 by Ashley

chemistry
Tricky one- my math fails here (a) A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The ...
January 11, 2013 by mangozier

chemistry
What is polymerization and what type is involved in forming a polymer when I have CH3 N CH O C and NH3 Can any one help please Polymerization is the chaining of monometers. Look for the double bond, it breaks, and forms a chain.
February 25, 2007 by bex

Solar energy please help
1-Consider an organic solar cell consisting of a TiO2 semiconductor with an ionization energy 7.8eV and a polymer with an electron affinity 3.4eV. Which of the followning band diagrams corresponds to the organic solar cell. The band gap of TiO2 is 3.5eV. (a) (b) 2-What is the ...
November 29, 2013 by UNO

chemistry
Is teflon a dimer? I know that it is an addition polymer, but I don't know if that classifies it as a dimer. No. A dimer is two monomers hooked together. Teflon is a polymer;i.e., many monomers hooked together. I tried to find the molar mass of teflon was was unable to do so. ...
May 1, 2007 by DavidG

Chemistry
Burning an empty Styrofoam container results in volumes of black sooty flames. On the basis of this observation alone, to what class of hydrocarbons would you suspect a component of the polystyrene polymer found in Styrofoam belongs? Explain.
February 13, 2013 by Morgan

science
A pressure vessel contains a large volume of CO2 gas at 10 atm pressure. A membrane composed of a poly(ether ketone) polymer with thickness 100 microns and net effective area of 100 cm2 covers a small perforated port in the container. The solubility of CO2 at 10 atm is 6.97 x ...
January 12, 2013 by harry

science
a polymer of sugar molecules is called
January 11, 2010 by Anonymous

science
How can starch be converted into a polymer
January 22, 2010 by Arewa james

Chem (monomers)
Hi I'm having major problems with monomers in proteins. One what is a monomer Two what is it doing in a protien? Much thanks, Rosie A "monomer" is a single unit of a polymer and a polymer is just a bunch of monomers (single units) hooked together. Teflon is a polymer. It is ...
April 15, 2007 by Rosie

biology
what is the chemical reaction that produces a polymer for of a biomolecule?
September 12, 2007 by Justine

Jack
how does cross linking alter the properties of a polymer?
February 28, 2008 by chemistry

Organic Chemistry
Does anyone know where I might find a step-by-step reaction mechanism for a polymer condensation reaction involving Hexamethylenediamine with Adipoyl Chloride (thus synthesizing Nylon 66)? If not, can anyone help list the steps that take place and why? Any help would be ...
April 26, 2009 by Zach

biology
what is the chemical reaction that produces a polymer form of a biomolecule?
September 12, 2007 by Jussie

seventh grade science
what is a monomer what is a polymer what is the structure of a protein
October 25, 2008 by david

chem
What is the structure of the addition polymer that results from polymerization of 2-chloropropene.
October 7, 2010 by mark

Science
I need an idea for something cool to do with a polymer pellet?
November 14, 2011 by Anonymous

science
Clay is a plastic material. Does thia imply that it is a polymer
June 13, 2012 by kratika

Chemistry
Vinyl chloride (H2C=CHCl), the starting material from which PVC polymer is made, has a Henry's-law constant of 0.091mol/(L.atm) at 25 C. What is the solubility of vinyl chloride in water (in mol/L) at 25C and a partial pressure of 0.90 atm? Thank you in advance
June 13, 2010 by Deborah

Biology
Which of the following is a polymer of an amino sugar? a.) cellulose b.) chitin c.) glycogen d.) starch
September 7, 2010 by Anna

Chemistry
Hi you guys please help me with my chemistry homework, i need to find all these items and take them to my class in a ziploc bag *a hydrocarbon with a molecular mass greater than 100g/mol *2 porpanol *an aromatic compound(not the common usage of "aromatic" the chemistry use. *a...
February 4, 2007 by Desperate

Chemistry
Assume that the LHMP is enclosed in a transparent polymer stucture. a. How will the gases inside LHMP be affected by hot days and cool nights? b. What design features might be incorporated in the LHMP to reduce those heating and cooling effects? I know that gases expand in ...
January 13, 2013 by Sara

chemistry
Please can someone help me before i pull all my hair out i've been struggling with this for about a week CH2=CH-CH-OH ________' _______CH3 i need to polymerize this compound and draw the structural formula it needs to contain three monomer units and i need to state the ...
March 1, 2007 by sarah

Chemistry
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 124 kJ is given off per mole of C2H4 reacting, how much heat is ...
October 19, 2010 by Jo

Chemistry
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 124 kJ is given off per mole of C2H4 reacting, how much heat is ...
October 22, 2010 by HELP !

science
Lipids: Not a polymer because _ __x's energy than carbs Saturated= Unsaturated= Nucleic Acids: RNA= DNA= Carbohydrates: Building blockks
January 26, 2013 by Katie

polymer chemistry
A spherical rubber balloon has an initial thickness of 0.45mm, and diameter 250mm. Final diameter of 1000mm. Find final thickness, true stress in the plane of the balloon wall, Air pressure required. (Assume rubber is idea and obeys Guassian statistics, and take the shear ...
May 5, 2010 by nick

polymer
how can we set up column for monomer purification give the minimum lenth and diametter for the column.
December 20, 2010 by pradee

chemistry
The monomer structure of polystyrene is shown below: (a) Would you expect polystyrene to be a stiff or a pliable polymer? 1)Stiff 2)Pliable (b) What kind of synthesis is used in the production of polystyrene from styrene monomers? 1)Addition polymerization 2)Condensation ...
December 17, 2012 by kkr

Chemistry
H8P1: Polystyrene The monomer structure of polystyrene is shown below: (a) Would you expect polystyrene to be a stiff or a pliable polymer? I)Stiff II)Pliable (b) What kind of synthesis is used in the production of polystyrene from styrene monomers? I)Addition polymerization ...
December 18, 2012 by qpt

CHEMISTRY
POLYMER COMPOSITE EXPERIMENT USED GLUE AND THREAD PUT STRIPS OF GLUE THEN ADDED STRANDS OF THREAD ALLOWED TO DRY DID 3 DIFFERENT STRIPS AND LAYED THREAD PARALLEL AND PERPENDICULAR ON ONE 1. I DON'T KNOW WHY THE STRIS THE LONG WAY SEEM STRONGER OR SHOULD THEY HAVE? 2. WHAT IF I...
April 6, 2010 by DEBBIE

science
why could dna be classified as a polymer A-has a chemical structure similar to salt crystals b-made of repeating pattern of smaller molecules c-a solid found in all living matter right answer b
April 30, 2013 by hh

Chemistry
(a) Propylene, H2C=CH-CH3, can be reacted to form a polymer known as polypropylene (PP). What type of polymerization reaction is most appropriate for the formation of polypropylene? i)Addition Polymerization ii)Anionic Polymerization iii)Condensation Polymerization (b) What is...
January 11, 2013 by Chemgam

chemistry
Hi you guys please help me with my chemistry homework, i need to find all these items and take them to my class in a ziploc bag *a hydrocarbon with a molecular mass greater than 100g/mol *2 porpanol *an aromatic compound(not the common usage of "aromatic" the chemistry use. *a...
February 4, 2007 by desperate

chemistry
Consider the polymer polybutadiene. (a) Will linear polybutadiene or branched polybutadiene have a higher molar volume? (b) Will linear polybutadiene or branched polybutadiene have a higher glass transition temperature? (c) Will linear polybutadiene or branched polybutadiene ...
May 8, 2013 by Anonymus

Chem please help
why is the formation of a condensation polymer impossible in these cases ? A) ethanoic acid + NH2CH2CH2CH2CH2NH2 B) ethanoic acid+CH3CH2NH2 C) HOOC-CH2-COOH + CH3CH2NH2
February 27, 2013 by K

Chem please help urgent
why is the formation of a condensation polymer impossible in these cases ? A) ethanoic acid + NH2CH2CH2CH2CH2NH2 B) ethanoic acid+CH3CH2NH2 C) HOOC-CH2-COOH + CH3CH2NH2
February 27, 2013 by K

business math
One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to $600,000, what are the total sales of the company? (P
May 5, 2013 by kendrick

Math
One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to $600,000, what are the total sales of the company?
May 1, 2013 by Erica

ALGEBRA
One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to $600,000, what are the total sales of the company?
October 29, 2013 by Anonymous

business math
one-ninth of polymer plastics' sales are made in New England. If New England sales amunt to $6000,000, what are the total sales?
November 5, 2013 by leonta

Business Math
One-ninth of Polymer Plastics’ sales are made in New England. If New England sales amount to $600,000, what are the total sales of the company? (Points : 2)
May 22, 2013 by Anonymous

gr 12 chem
true or false- correct/explain those that is false Benzene is generally more reactive than alkanes and less reactive than alkenes because of the bonding in its aliphatic ring The polymer produced from polymerization of H2NCH2COOH is......? Write out the formula/equation The ...
March 9, 2010 by shelly

statistics
Five samples are taken every hour from a production line & the average hourly measurement weight of polymer beads is recorded. Approximately 1/7 of these averages exceed 2.50g when the mean value is approximately 2.40g. Determine the proportion of individual readings exceeding...
September 22, 2012 by Wasl

chemistry
the diagram below shows a structural formulae of 3 cabon compounds labelled 1 2 and 3 and the eaction between compounds 1 and 2. The equation for this reaction is incomplete only the reactants are shown, the missing products being indicatedby a? :o ch2 =ch-ch -oh + ch3 - ch - ...
February 19, 2007 by bex

chem 211
Organic hydrogenation reactions, in which H2 and an "unsaturated" organic compound combine, are used in the food, fuel, and polymer industries. In the simplest case, ethene (C2H4) and H2 form ethane (C2H6). If 144 kJ is given off per mole of C2H4 reacting, how much heat is ...
October 18, 2013 by beti

science(chem) plastic hedache...can anyone help?
My hwk Q that I was trying to find the answer to yesterday is this below but I don't know exactly how the placticizing process works. I compiled the chemicals I think I need but other than that I'm stumped as to how to put them together or how. Q: A water pipe has burst in ...
February 18, 2008 by ~christina~

Thermodynamics
I am doing a lab and there is one question I can't get. We have the enthalpy of fusion of crystalline polyeythlene, mass, onset temperature and energy required for a phase change of both low density polyethylene and high density polyethylene. They as to calculate the percent ...
September 23, 2007 by Tracy

Thermodynamics
I am doing a lab and there is one question I can't get. We have the enthalpy of fusion of crystalline polyeythlene, mass, onset temperature and energy required for a phase change of both low density polyethylene and high density polyethylene. They as to calculate the percent ...
September 24, 2007 by Tracy

Materials Science
A compression bar, having a square cross section of side length b, must support a compressive load of magnitude W, uniformly distributed over the bar cross section. The bar is made of two segments connected by a glued joint along plane pq, which is at an angle α to the ...
October 10, 2014 by qwerty

chemistry
How do you make a venn diagram of the 6 branches of chemistry? (Inorganic chemistry, organic chemistry, biochemistry, nuclear chemistry, physical chemistry, and analytical chemistry) like where would they go in the 3 circles
August 26, 2012 by jake

Gr.12 Chem - PLEASE CHECK MY ANSWER
Hi, Im learning about polymers. I did a lab to make slime where I mixed PVA glue & water. I then added borax to some water in another container, and the poured off the water from the wet borax. I then added the borax to the glue/water solution. I have to make a procedure that ...
May 28, 2008 by Heidi

chemistry
Polyglycolic acid, PGA, is a polymer that we know rather well how to control the structure of (even though there are currently only limited applications). So in the lab we have created two types of PGA for testing, a linear chain PGA and a branched chain PGA. Assume comparable...
December 21, 2013 by Dick

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