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