To determine why poly(acrylic acid) has a higher T g than poly(vinyl chloride). Concept introduction: Polar molecules can participate in dipole–dipole interactions, so they generally have higher melting points than nonpolar molecules with similar molar masses. Similarly, poly(vinyl chloride), a polar polymer, has a significantly higher T g than polypropylene, a nonpolar polymer, even though both polymers have similar molar masses

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Answer 1

Question

Chapter 26, Problem 26.20YT

Interpretation Introduction

Interpretation:

To determine why poly(acrylic acid) has a higher T_g than poly(vinyl chloride).

Concept introduction:

Polar molecules can participate in dipole–dipole interactions, so they generally have higher melting points than nonpolar molecules with similar molar masses. Similarly, poly(vinyl chloride), a polar polymer, has a significantly higher T_g than polypropylene, a nonpolar polymer, even though both polymers have similar molar masses

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2. Poly (ethyl acrylate) (EA) and Poly(methyl methacrylate) (PMMA) have the same molecular formula (CsO2Ha)n, why their Tg is so different?

4. Describe how the stereoisomerism affect the degree of crystallinity of a semicrystalline polymer such as polyethylene.

How does crosslinking change the properties of polymer?

Answer 2

Question

Chapter 26, Problem 26.20YT

Interpretation Introduction

Interpretation:

To determine why poly(acrylic acid) has a higher T_g than poly(vinyl chloride).

Concept introduction:

Polar molecules can participate in dipole–dipole interactions, so they generally have higher melting points than nonpolar molecules with similar molar masses. Similarly, poly(vinyl chloride), a polar polymer, has a significantly higher T_g than polypropylene, a nonpolar polymer, even though both polymers have similar molar masses

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Answer 3

Question

Chapter 26, Problem 26.20YT

Interpretation Introduction

Interpretation:

To determine why poly(acrylic acid) has a higher T_g than poly(vinyl chloride).

Concept introduction:

Polar molecules can participate in dipole–dipole interactions, so they generally have higher melting points than nonpolar molecules with similar molar masses. Similarly, poly(vinyl chloride), a polar polymer, has a significantly higher T_g than polypropylene, a nonpolar polymer, even though both polymers have similar molar masses

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Answer 4

Question

Chapter 26, Problem 26.20YT

Interpretation Introduction

Interpretation:

To determine why poly(acrylic acid) has a higher T_g than poly(vinyl chloride).

Concept introduction:

Polar molecules can participate in dipole–dipole interactions, so they generally have higher melting points than nonpolar molecules with similar molar masses. Similarly, poly(vinyl chloride), a polar polymer, has a significantly higher T_g than polypropylene, a nonpolar polymer, even though both polymers have similar molar masses

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Answer 5

Chapter 26, Problem 26.20YT

Interpretation Introduction

Interpretation:

To determine why poly(acrylic acid) has a higher T_g than poly(vinyl chloride).

Concept introduction:

Polar molecules can participate in dipole–dipole interactions, so they generally have higher melting points than nonpolar molecules with similar molar masses. Similarly, poly(vinyl chloride), a polar polymer, has a significantly higher T_g than polypropylene, a nonpolar polymer, even though both polymers have similar molar masses

Answer 6

Chapter 26, Problem 26.20YT

Interpretation Introduction

Interpretation:

To determine why poly(acrylic acid) has a higher T_g than poly(vinyl chloride).

Concept introduction:

Polar molecules can participate in dipole–dipole interactions, so they generally have higher melting points than nonpolar molecules with similar molar masses. Similarly, poly(vinyl chloride), a polar polymer, has a significantly higher T_g than polypropylene, a nonpolar polymer, even though both polymers have similar molar masses

Answer 7

Chapter 26, Problem 26.20YT

Interpretation Introduction

Interpretation:

To determine why poly(acrylic acid) has a higher T_g than poly(vinyl chloride).

Concept introduction:

Polar molecules can participate in dipole–dipole interactions, so they generally have higher melting points than nonpolar molecules with similar molar masses. Similarly, poly(vinyl chloride), a polar polymer, has a significantly higher T_g than polypropylene, a nonpolar polymer, even though both polymers have similar molar masses

Answer 8

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Answer 9

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Answer 10

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Answer 11

Ch. 26 - Prob. 26.1P Ch. 26 - Prob. 26.2P Ch. 26 - Prob. 26.3P Ch. 26 - Prob. 26.4P Ch. 26 - Prob. 26.5P Ch. 26 - Prob. 26.6P Ch. 26 - Prob. 26.7P Ch. 26 - Prob. 26.8P Ch. 26 - Prob. 26.9P Ch. 26 - Prob. 26.10P

Solution Summary: The author explains that poly(acrylic acid) has a higher T g because it is more polar and has stronger intermolecular interactions-hydrogen.

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Chapter 26 Solutions