Poly(methyl methacrylate) (PMMA), more commonly known as acrylic glass.Draw the monomer, given that this polymer forms by addition polymerization. Include all H atoms.
To draw the monomer unit of poly(methyl methacrylate) (PMMA), it is important to understand its chemical structure and how it forms through addition polymerization.
PMMA consists of repeating units of methyl methacrylate. The monomer unit of PMMA, methyl methacrylate, can be depicted as follows:
H H
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H - C = C - 3
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H CH3
Let's break down the structure and understand its components:
1. There is a double bond (C=C) between the carbon atoms in the center. This double bond is important for the addition polymerization process, where the monomer units join together by breaking this bond and forming new bonds during polymerization.
2. On one side of the double bond, there is a methyl group (CH3) attached to the carbon atom.
3. On the other side of the double bond, there is a methoxy group (OCH3) attached to the carbon atom, which is also attached to an oxygen atom. This oxygen atom is bonded to another carbon atom, which forms a carbonyl group (C=O). The carbon atom in the carbonyl group is attached to another methoxy group (OCH3).
It is important to note that in the monomer unit, there are hydrogen atoms (H) attached to the carbon atoms. However, when polymerization occurs, these hydrogen atoms are lost as new bonds are formed between the monomer units.
By understanding the structure and process of addition polymerization, you can now draw the monomer unit of PMMA, given the chemical formula and arrangement of atoms.