EFFECT OF MOLECULAR-WEIGHT ON GLASS-TRANSITION TEMPERATURES (COMPOSITIONAL VARIATION OF GLASS-TRANSITION TEMPERATURES-3)

被引:27
作者
COUCHMAN, PR
机构
[1] Department of Mechanics and Materials Science, Rutgers University, New Brunswick
关键词
D O I
10.1063/1.325792
中图分类号
O59 [应用物理学];
学科分类号
摘要
A predictive equation for the influence of chain ends on glass-transition temperatures is derived from a thermodynamic theory for the compositional variation of Tg. This relation is found to give excellent agreement with results for the effect in polystyrene, and produces a convenient and accurate first approximation. Secondary approximations to the principal equation are formally identical to the Ueberreiter-Kanig and Fox-Flory equations for the variation of Tg with molecular weight.
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页码:6043 / 6046
页数:4
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