Relation between microstructure and glass transition temperature of poly[(methyl methacrylate)-co-(ethyl acrylate)]

✍ Scribed by Giao Nguyen; Daniel Nicole; Marek Matlengiewicz; Denis Roizard; Norbert Henzel

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: English
• Weight: 136 KB
• Volume: 50
• Category: Article
• ISSN: 0959-8103
• DOI: 10.1002/pi.694

✦ Synopsis

Abstract

The glass transition temperature of a series of samples of the poly[(methyl methacrylate)‐co‐(ethyl acrylate)] copolymer, synthesized at low conversion, were calculated theoretically using the equations of Barton and Johnston. The values obtained are more precise when the probabilities of the compositional diads are derived from the ^13^C NMR data instead of the classical method utilizing reactivity ratios. This can be observed more clearly when the copolymer samples are synthesized at high conversion. Introduction of configuration (tacticity) at the diad level confirms the above observations and slightly improves the calculated values of T~g~ compared to the initial formulae which were only taking into account the compositional sequences of the copolymer.

© 2001 Society of Chemical Industry