改性聚苯硫醚纤维高温氧化行为变化机理研究  

Study on Change Mechanism of High Temperature Oxidation Behavior for Modified Polyphenylene Sulfide Fiber

作　　者：连丹丹[1] 刘伟方 尹立新[2] MT Rasnatun Ferdous 卢建军[1] LIAN Dandan;LIU Weifang;YIN Lixin;MT Rasnatun Ferdous;LU Jianjun(Taiyuan University of Technology,Jinzhong,030600,China;Jiangsu Hengli Chemical Fiber Co.,Ltd.,Suzhou,215226,China)

机构地区：[1]太原理工大学,山西晋中030600 [2]江苏恒力化纤股份有限公司,江苏苏州215226

出　　处：《棉纺织技术》2022年第2期20-24,共5页Cotton Textile Technology

基　　金：国家自然科学基金青年基金项目(51903184);中国博士后科学基金资助项目(2021M701129)。

摘　　要：探究聚苯硫醚纤维抗氧化改性前后高温氧化的行为及机理。利用恒温烘箱对聚苯硫醚纤维和纳米Ti-SiO_(2)改性聚苯硫醚纤维进行240℃下24 h、192 h和360 h的热氧化处理,对处理前后纤维的分子结构和聚集态结构进行表征。结果表明:高温有氧工况使聚苯硫醚纤维的熔融热焓和峰温提高,熔程缩短;芳环间交联和S的氧化会使聚苯硫醚本身的晶格常数缩小,晶格密度提高;氧化后聚苯硫醚产生大量的芳环间交联,C—S键断裂,分子中S被氧化成亚砜和砜,改性聚苯硫醚纤维中Si—S配位和芳香氢键的存在,能够提高改性后的聚苯硫醚纤维的抗氧化作用。认为:通过改性确实能提高聚苯硫醚纤维的抗氧化能力。Behavior and mechanism of polyphenylene sulfide fiber before and after high temperature oxidation modification were explored.Constant temperature oven was used for the thermal oxidation treatment of polyphenylene sulfide fiber and nano Ti—SiO_(2) modified polyphenylene sulfide fiber at 240℃for 24 h,192 h and360 h.Molecular structure and aggregation structure of fiber before and after treatment were evaluated.The results showed that the enthalpy and peak temperature of polyphenylene sulfide fiber were increased and the melting range was shortened for high temperature oxidation operating condition.The lattice constant of polyphenylene sulfide was shortened and the lattice density was increased by aromatic ring crosslinking and S oxidation.After oxidation,a large quantity of aromatic ring crosslinking were produced,C—S bond was broken.S in molecular was oxidated to sulfoxide and sulphone.The Si—S coordination and existing of aromatic hydrogen bonds in modified polyphenylene sulfide fiber could improve the antioxidation of modified polyphenylene sulfide fiber.It is considered that the antioxidation capability of modified polyphenylene sulfide fiber can be improved by modification.

关 键 词：聚苯硫醚纤维 纤维改性 高温氧化 聚集态结构 分子结构变化 

分 类 号：TS101.3[轻工技术与工程—纺织工程]