氯化银光引发聚合制备单分散聚苯乙烯微球  

AgCl Nano-cubics Used as Photoinitiator for Polymerizing Monodispersed Polystyrene Microspheres

作　　者：杨莹[1] 赵岩[1] 颜雨坤[1] 张劲松[1] 

机构地区：[1]中国科学院金属研究所,沈阳110016

出　　处：《材料研究学报》2016年第11期868-874,共7页Chinese Journal of Materials Research

摘　　要：以氯化银颗粒为光引发剂,以聚乙烯吡咯烷酮(PVP)为分散稳定剂,在紫外光辐照下引发苯乙烯单体聚合制备了单分散的聚苯乙烯微球。用扫描电子显微镜(SEM)、傅里叶红外光谱(FT-IR)等手段对光诱导聚合产物进行了表征,用差示扫描量热仪(DSC)测试了聚苯乙烯微球的玻璃化转变温度。反应动力学研究表明,这种聚合反应符合一级反应动力学特征;反应机理研究证明,该聚合反应属于自由基聚合,乙氧基自由基(CH_3CH_2O·)为引发聚合反应的活性基团。在紫外光的照射下,这种氯化银立方体颗粒具有一定的稳定性。Mono-dispersed polystyrene microspheres were prepare by UV irradiation assisted polym-erization of styrene monomer with AgCI nano-cubic particles as photoinitiator and polyvinylpyrrolidone （PVP） as dispersion stabilizer. The morphology, molecular structure and glass transition temperature of the polymers were characterized by SEM, FT-IR and DSC respectively. From the polymerization dynamics, it follows that the photopolymerization process was a first order reaction. The photopolymerization reaction could be identified as a kind of free radical polymerization, while CH3CH2O· was the active group in the photopolymerization. Besides, AgCl nano-cubic particles were stable under UV irradiation.

关 键 词：有机高分子材料 氯化银 光引发 聚苯乙烯微球 聚合 

分 类 号：O631.5[理学—高分子化学]