Thermal cross-link behavior of an amorphous poly (para-arylene sulfide sulfone amide) |
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Authors: | Yaqi Yang Jing Liu Xiaojun Wang |
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Affiliation: | a College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering of China, Sichuan University, Chengdu 610065, PR China b Institute of Materials Science and Technology, Sichuan University, Chengdu 610064, PR China c College of Chemistry, Sichuan University, Chengdu 610064, PR China |
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Abstract: | Cross-link behavior of an amorphous poly (para-arylene sulfide sulfone amide) synthesized via low temperature solution polycondensation was observed for the first time, when the polymer was subject to a series of thermal curing at 260 °C in air condition. The formation of cross-link network was demonstrated by the DSC and TGA results that Tg of the polymer enhanced from 259.17 °C to 268.89 °C, and the 1% weight loss temperature increased remarkably from 243.75 °C to 345.87 °C. EPR analysis further suggested that two kinds of free radicals, CO and C , induced by thermal curing were responsible for this cross-link behavior. According to FT-IR spectrum, the origin of these free radicals was confirmed as amide C O group in the polymer backbone. The cross-linking type was attributed to conventional radical cross-link reaction and the cross-link mechanism was discussed in detail subsequently. |
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Keywords: | Poly (para-arylene sulfide sulfone amide) Thermal curing Cross-link behavior |
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