聚硅氧烷的紫外光固化特性及热解机理研究  

UV Curing Behavior and Thermodegradation Mechanism of Polysiloxanes

作　　者：薄澜 王生杰[2] 孔杰[2] 

机构地区：[1]西安杨森制药有限公司 [2]西北工业大学理学院应用化学系

出　　处：《材料工程》2007年第9期62-66,共5页Journal of Materials Engineering

摘　　要：通过调聚法合成了不同乙烯基含量的聚硅氧烷,利用红外光谱和凝胶渗透色谱对聚合物进行了表征。研究了光引发剂、固化氛围、乙烯基团含量对所制备聚硅氧烷紫外光固化行为的影响;并利用热失重分析仪对固化物的热解机理进行了探讨。实验表明在氮气气氛下,以IHT-PI-185为光引发剂,随着聚合物中乙烯基团含量增加,固化速率加快,且固化后聚合物的耐热性能提高。Polysiloxanes with different vinyl contents were synthesized via polycondensation reaction, and characterized by FT-IR and GPC. The effects of photoinitiator, atmosphere, and contents of vinyl groups on UV curing behavior of polysiloxanes were explored, according to the absorption area changing of double bond in FT-IR spectra under UV radiation. Finally, TGA was used to investigate their thermodegradation mechanism. Experiment results indicated that curing rate and thermal stability of the polysiloxanes were improved with the increasing of methylvinylsiloxane units in polysiloxanes with IHT-PI-185 as photoinitiator in nitrogen atmosphere.

关 键 词：聚硅氧烷 紫外光固化 热解机理 

分 类 号：TQ050.425[化学工程]