A Study of the Glass Transition in Polymeric Mesophases via Calorimetric and Non-Linear ESR Techniques

Abstract

In undercooled polymeric mesophases, being annealed at a temperature higher than T_g , nucleation and crystal growth processes take place. We investigate the ageing of comb-like polyacrilates both by calorimetry and non-linear ESR After annealing, the local transport properties of the polymers with quenched disorder exhibit relevant changes which are interpreted in terms of a decreased cooperativity of the amorphous part.

Key Words:

• glass transition
• non-linear ESR
• thermal analysis