含氟聚硅氧烷共聚物的制备与性能研究  

Synthesis and Properties of Fluorine-containing Polysiloxane Copolymer

作　　者：尚薇伟 张蒙蒙 张鑫 宋慈 武明月 杨林川 刘刚 朱庆增 SHANG Weiwei;ZHANG Mengmeng;ZHANG Xin;SONG Ci;WU Mingyue;YANG Linchuan;LIU Gang;ZHU Qingzeng(School of Chemistry and Chemical Engineering,Shandong University,Key Laboratory of Special Functional Aggregated Materials,Ministry of Education,Jinan 250100,China)

机构地区：[1]山东大学化学与化工学院,特种功能聚集体材料教育部重点实验室,山东济南250100

出　　处：《有机氟工业》2021年第2期1-5,共5页Organo-Fluorine Industry

基　　金：山东省重点研发计划(2019JMRH0206);山东省重点扶持区域引进急需紧缺人才项目(2020年);2020年度山东大学基本科研业务费;潍坊鸢都产业领军人才计划(潍政办字[2017]136号)支持。

摘　　要：以三氟丙基甲基环三硅氧烷和八甲基环四硅氧烷为原料,经过阴离子开环聚合制备了一系列含氟量不同的聚二甲基-三氟丙基甲基硅氧烷共聚物(PMFS),利用FTIR、^(1)H NMR、GPC对制备的PMFS进行了结构和分子质量表征。利用TGA和DSC研究了PMFS的热稳定性、玻璃化转变温度和结晶行为。与聚二甲基硅氧烷相比较,随着三氟丙基甲基硅氧链节在共聚物中比例的增加,共聚物热稳定性降低明显,玻璃化转变温度呈现增加的趋势,但结晶行为消失,三氟丙基甲基硅氧链节降低了共聚物高分子链的对称性,有利于共聚物的耐低温性能。A series of fluorine-containing polysiloxane copolymers,poly(dimethyl-trifluoropropylmethyl)siloxanes(PMFS)with different fluorine content were prepared through anionic ring-opening polymerization of trifluoropropylme thylcyclotrisiloxane and octamethylcyclotetrasiloxane.The structure and molecular weight of PMFS were characterized by FTIR,^(1)H NMR,and GPC.The thermal stability,glass transition temperature(Tg)and crystallization behaviors of PMFS were studied by TGA and DSC.The experimental results showed that with the increasing of trifluoropropylmethylsiloxy units,the thermal stability of PMFS decreased.Meanwhile,compared with the Tg of polydimethylsiloxanes,the Tg of PMFS increased.However,the DSC curves of PMFS did not show crystallization peaks.The symmetry of PMFS macromolecular chains are destroyed by the introduced trifluoropropylmethylsiloxy units.The low temperature resistance of polydimethylsiloxanes are improved.

关 键 词：三氟丙基 聚硅氧烷 共聚 热稳定性 结晶 

分 类 号：TQ317[化学工程—高聚物工业]