Chapter 26, Problem 26.21P

Interpretation Introduction

(a)

Interpretation:

Which polymer, C or D, has the higher ${\text{T}}_{\text{g}}$ is to be predicted and to be justified.

Concept introduction:

The glass transition temperature ${\text{(T}}_{\text{g}})$ is thermal property that quantifies the crystalline and amorphous character of a polymer. Thermal transitions and the solubility properties of a polymer depend on the length of the polymer molecules, the extent of branching, the rigidity of the polymer, the symmetry of the polymer, and the intermolecular forces. Polymers that have stronger types of intermolecular interactions generally have a higher ${\text{T}}_{\text{g}}$.

Interpretation Introduction

(b)

Interpretation:

Which polymer, C or D, has the higher ${\text{T}}_{\text{g}}$ is to be predicted and to be justified.

Concept introduction:

The glass transition temperature ${\text{(T}}_{\text{g}})$ is thermal property that quantifies the crystalline and amorphous character of a polymer. Thermal transitions and the solubility properties of a polymer depend on the length of the polymer molecules, the extent of branching, the rigidity of the polymer, the symmetry of the polymer, and the intermolecular forces. Polymers that have stronger types of intermolecular interactions generally have a higher ${\text{T}}_{\text{g}}$.