Evolution of color centers in UV-irradiated syndiotactic polystyrene at elevated temperatures

被引：3
|
作者：
Li, Ming-Yi [1 ]
Chuang, Yu-Fan [1 ]
Yang, Fuqian [2 ]
Lee, Sanboh [1 ]
机构：
[1] Natl Tsing Hua Univ, Dept Mat Sci & Engn, Hsinchu 300, Taiwan
[2] Univ Kentucky, Dept Chem & Mat Engn, Lexington, KY 40506 USA
来源：
MATERIALS RESEARCH EXPRESS | 2017年 / 4卷 / 02期
关键词：
color centers; syndiotactic polystyrene; thermal annealing; UV irradiation; OPTICAL POLYMERS; AIR ATMOSPHERES; FT-IR; CRYSTALLIZATION; VACUUM; FORM; COPOLYMER; RADIATION; BEHAVIOR; KINETICS;
D O I：
10.1088/2053-1591/aa5cd8
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
The evolution of the color centers in UV-irradiated syndiotactic polystyrene (sPS) at elevated temperatures is investigated using UV-Vis spectroscopy. The UV cut-off wavelength of the sPS is hypsochromic shift under the irradiation of ultraviolet light and bathochromic shift under the irradiation of gamma ray. The concentration of the color centers in the sPS increases with increasing the annealing time for the UV irradiation. A generation model of first order is proposed to analyze the evolution of the color centers in the UV-irradiated sPS during annealing. The activation energy for the evolution of the color centers increases with increasing the UV dose. The irradiation of UV light causes the decrease of the glass transition temperature of sPS.
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页数：9
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