苯乙烯/纳米无机粒子原位悬浮聚合制备EPS纳米复合材料  

Expandable Polystyrene Nanocomposites Prepared by Styrene/Nano-inorganic Particle by In-situ Suspension Polymerization

作　　者：韩冰[1] 李杨[1,2] 申凯华[1,2] 王玉荣[1,2] 

机构地区：[1]大连理工大学化工学院高分子材料系精细化工国家重点实验室,辽宁大连116024 [2]辽宁省高分子科学与工程重点实验室,辽宁大连116024

出　　处：《中国塑料》2012年第6期44-49,共6页China Plastics

基　　金：江苏嘉盛新材料有限公司资助项目(200902688)

摘　　要：采用自由基原位悬浮聚合方法,由苯乙烯/纳米无机粒子(NIP)聚合制备聚苯乙烯纳米复合材料(PSNC),再以戊烷为发泡剂制备了可发性聚苯乙烯纳米复合材料(EPSNC),筛选了NIP改性剂的种类。利用凝胶渗透色谱仪和热重分析仪对EPSNC进行表征,研究了EPSNC的分子结构和热性能,采用扫描电子显微镜对EPSNC泡体内部微观形貌进行表征,研究NIP含量对其泡体微观形貌的影响规律。结果表明,以钛酸酯偶联剂改性NIP(M-NIP)聚合产率最高;M-NIP用量在一定范围内对EPSNC的相对分子质量影响不大,但相对分子质量分布变窄;含有M-NIP的EPSNC的热稳定性明显提高;EPSNC发泡时NIP起成核作用,M-NIP能够均匀地分散在EPSNC中,其泡孔堆积有序,细密一致,且多为闭孔结构。Based on in situ radical suspension polymerization, polystyrene nanocomposites were prepared from styrene and nano-inorganic particle. Then, hexane was added to prepare expandable polystyrene nanocomposites （EPSNC）. EPSNC were characterized by means of gel permeation chromatography, thermo gravimetric analyzer, and scanning electron microscope. It showed that at a suitable content of nano-inorganic particle, the molecular weight of EPSNC had a narrower distribution, the thermal stability of EPSNC was improved significantly. In addition, the nano- inorganic particle showed a nucleation function in the foaming process. The nano-inorganic particle dispersed finely in polystyrene, resulting in small and uniform closed-cell structure.

关 键 词：可发性聚苯乙烯 纳米无机粒子 原位悬浮聚合 复合材料 微观形貌 

分 类 号：TB383.1[一般工业技术—材料科学与工程]