期刊
JOURNAL OF POLYMER SCIENCE PART B-POLYMER PHYSICS
卷 46, 期 11, 页码 1094-1103出版社
WILEY
DOI: 10.1002/polb.21442
关键词
crystallization; differential scanning calorimetry (DSC); irradiation nucleation control; PEEK; proton irradiation; thermodynamic melting point
Amorphous poly(ether-ether-ketone) (PEEK) progressively crosslinks on irradiation with 11.0 MeV protons, and this has a marked effect on the extent of crystallinity that subsequently develops and on the kinetics of the high temperature isothermal crystallization. The extent of crystallinity with time was analyzed using the Avrami equation, and the temperature dependence of the rate constants was analyzed in terms of nucleation theory. While irradiation inhibits the overall rates of crystallization by the reduction in the mobility of the chain segments as observed by the progressive increase in the glass transition temperature, it also alters the fold surface free energy. The observed melting points were consistent with depression of the equilibrium melting point by the crosslinks produced by irradiation. These two effects alone are sufficient to account for the inhibition of crystallization on irradiation of PEEK by protons. (c) 2008 Wiley Periodicals, Inc.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据