Chapter 16, Problem 16.19P

Interpretation Introduction

Interpretation:

The relationship between glass transition temperature and melting temperature for the given condition should be plotted along with the approximate relationship between two critical temperatures. Also, state whether the same relationship has to be followed for thermoplastic and elastomers.

Concept introduction:

Glass transition temperature is defined as the temperature at which polymer gets transformed to hard material from ductile and brittle material. It is denoted by ${\text{T}}_{\text{g}}$.

Factors on which glass transition temperature depends are as follows:

1. Chemical structure of epoxy resin.
2. The type of hardener.
3. Degree of cure.

Glass transition temperature is measured using Differential scanning calorimetry.

Melting temperature: The range of temperature over which the melting occurs is known as melting point.It is denoted by ${\text{T}}_{\text{m}}$.