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Journal of Macromolecular Science, Part B
Physics
Volume 9, 1974 - Issue 3
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Original Articles

Glass transition and chain flexibility of linear polymers

V. P. Privalko Institute of Macromolecular Chemistry, Ukrainian Academy of Sciences, 252160, Kiev, 160, Kharkovskoye Chaussee, 48, USSR
&
Yu. S. Lipatov Institute of Macromolecular Chemistry, Ukrainian Academy of Sciences, 252160, Kiev, 160, Kharkovskoye Chaussee, 48, USSR
Pages 551-564 | Received 13 Dec 1972, Accepted 05 Jun 1973, Published online: 19 Aug 2006
 
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Abstract

Dependence of the glass-transition temperature, Tg, on polymer chain flexibility predicted by the Gibbs-DiMarzio theory was empirically tested by studying the relationship between Tg and the stiffness parameter for isolated chains, [sgrave]. It was found that [sgrave] is not a single variable controlling Tg for different polymer series which have different free volume fractions at Tg as a result of intrinsic differences in packing density in the crystalline state. The results obtained suggest that Tg of linear polyethylene lies near 160°K. A functional form of dependence of Tg on chain stiffness parameter and on local chain packing coefficient at Tg is proposed.

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