Answers are grounded in this paper and cite their sources.
Homopolymers and blends of polycarbonate/ThermX have been investigated by differential scanning calorimetry, dynamic mechanical analysis, density measurements, and positron annihilation lifetime spectroscopy. The study focuses on the chain mobility and free volume in the amorphous miscible regions of the blends and how this mobility and free volume are affected by increasing crystallinity. It is proposed that judicious annealing, which results in increasing crystallinity (while avoiding ageing or transesterification), induces a constraint on the amorphous region leading to an increase in T g and coalescence of free volume sites.
No takes yet. Share an insight, caveat, or question.
Zipper et al. (1994) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: