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Melt Properties of Poly(styrene-co-acrylonitrile) and Poly(butylene terephthalate) and their Interfacial Tension

✍ Scribed by Moyeenuddin Ahmad Sawpan; Zofia Funke; Martin Weber; Hans-Werner Kammer; Jörg Kressler


Book ID
102486715
Publisher
John Wiley and Sons
Year
2009
Tongue
English
Weight
337 KB
Volume
210
Category
Article
ISSN
1022-1352

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✦ Synopsis


Abstract

Pressure‐volume‐temperature and surface tension behaviour were studied for random copolymers of styrene and acrylonitrile (SAN) and for poly(butylene terephthalate) (PBT). Results served to determine reduction parameters for the equation‐of‐states by Flory‐Orwoll‐Vrij and by Simha‐Somcynsky as well. Surface tension as a function of copolymer composition displays negative deviation from additivity. It indicates surface excess of styrene units. Similar behaviour with respect to copolymer composition was found for variation of interfacial tension between SAN and PBT. Thickness of surface region is around 1 nm and does not change with copolymer composition whereas extension of interfacial region between PBT and SAN copolymers varies strongly with copolymer composition between around 2 and 60 nm.

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Copolymerization of acrylonitrile (AN) with p-trimethylsilylstyrene (TMSS) was carried out at 60°C in bulk and in solution in the presence of 2,2Јazobisisobutyronitrile (AIBN). The reactivity ratios of AN (M 1 ) and TMSS (M 2 ) were determined to be r 1 ϭ 0.068 and r 2 ϭ 0.309. The effects of the AI