Construct the following using molecules of your choice: a) a polyester and b) a polyamide. Each drawing should have four monomers and should be original in its structure. Your polymers can not be biochemical (carbohydrate, lipid, protein, etc.). Identify the reactions as condensation or addition reactions.
Can someone provide me with a weblink I would appreciate it.
Here are several sites that discuss condensation and addition polymers although I think all but two relate the first. Anyway, this should get you started. I note that some of them use generalized R-COOH etc type of reactions and you can vary the R.
http://en.wikipedia.org/wiki/Addition_polymer
http://en.wikipedia.org/wiki/Condensation_polymer
http://www.elmhurst.edu/~chm/vchembook/402condensepolymers.html
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http://science.jrank.org/pages/5405/Polymer.html
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To construct a polyester and a polyamide, we can choose specific monomers and link them together using condensation reactions. Here's how you can go about designing each polymer:
a) Polyester:
Polyesters are formed by the condensation reaction between a dicarboxylic acid and a diol. For this example, let's use terephthalic acid as the dicarboxylic acid and ethylene glycol as the diol.
1. Start by drawing the structure of terephthalic acid, which consists of a benzene ring with two carboxylic acid groups attached to it.
2. Next, draw the structure of ethylene glycol, which consists of two alcohol (OH) groups attached to two carbon atoms.
3. To form a polyester, we will remove a water molecule (H2O) from each molecule. This reaction is a condensation reaction because water is eliminated during the formation of the polymer.
4. Connect the carboxylic acid group of terephthalic acid with one of the hydroxyl groups of ethylene glycol, forming an ester bond. Repeat this process with the other carboxylic acid and hydroxyl groups until all four monomers are attached, resulting in a repeating sequence of ester linkages.
5. The final structure will be a chain of alternating terephthalic acid and ethylene glycol units, with ester linkages between them.
b) Polyamide:
Polyamides, also known as nylon, are formed by the condensation reaction between a dicarboxylic acid and a diamine. For this example, let's use adipic acid as the dicarboxylic acid and hexamethylenediamine as the diamine.
1. Start by drawing the structure of adipic acid, which consists of a six-carbon chain with two carboxylic acid groups attached to it.
2. Next, draw the structure of hexamethylenediamine, which consists of a six-carbon chain with amino (NH2) groups at both ends.
3. To form a polyamide, we will remove a water molecule (H2O) from each molecule. This reaction is a condensation reaction because water is eliminated during the formation of the polymer.
4. Connect one carboxylic acid group of adipic acid with one amino group of hexamethylenediamine, forming an amide bond. Repeat this process with the other carboxylic acid and amino groups until all four monomers are attached, resulting in a repeating sequence of amide linkages.
5. The final structure will be a chain of alternating adipic acid and hexamethylenediamine units, with amide linkages between them.
Unfortunately, as an AI text-based bot, I am unable to provide web links directly. However, you can search for "Polyester formation" and "Polyamide formation" on reliable chemistry websites or educational resources to find detailed information and visual representations of these reactions.