+CH₂ CH C=0 9 CH3 poly(methyl acrylate) CH3 +CH₂-C C=0 9 CH3 poly(methyl methacrylate

Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Which polymer is more flexible at room temperature: poly(methyl acrylate) (CAS# 9003-21-8) or poly(methyl methacrylate) (CAS# 9011-14-7)? Why? Use your knowledge of the relationship between polymer structure and its Tg to help explain and support your answer
The image shows the structural formulas for two types of polymers: poly(methyl acrylate) and poly(methyl methacrylate).

1. **Poly(methyl acrylate) (PMA)**

   - The structure consists of a repeating unit where each segment contains:
     - A carbon backbone denoted as \[-CH_2-CH-\] with a subscript \( n \) indicating that it repeats.
     - A side group attached to the carbon backbone: \[-C(=O)OCH_3\].

2. **Poly(methyl methacrylate) (PMMA)**

   - Similar to PMA, the structure consists of a repeating unit with:
     - A carbon backbone denoted as \[-CH_2-C(CH_3)-\] with a subscript \( n \) indicating repetition.
     - A side group attached to the carbon backbone: \[-C(=O)OCH_3\].
   
The main difference between PMA and PMMA is the additional methyl group (\(-CH_3\)) attached to the carbon atom in the methacrylate monomer, altering the properties of the polymer.
Transcribed Image Text:The image shows the structural formulas for two types of polymers: poly(methyl acrylate) and poly(methyl methacrylate). 1. **Poly(methyl acrylate) (PMA)** - The structure consists of a repeating unit where each segment contains: - A carbon backbone denoted as \[-CH_2-CH-\] with a subscript \( n \) indicating that it repeats. - A side group attached to the carbon backbone: \[-C(=O)OCH_3\]. 2. **Poly(methyl methacrylate) (PMMA)** - Similar to PMA, the structure consists of a repeating unit with: - A carbon backbone denoted as \[-CH_2-C(CH_3)-\] with a subscript \( n \) indicating repetition. - A side group attached to the carbon backbone: \[-C(=O)OCH_3\]. The main difference between PMA and PMMA is the additional methyl group (\(-CH_3\)) attached to the carbon atom in the methacrylate monomer, altering the properties of the polymer.
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