摘要
以γ-氯丙基三乙氧基硅烷为原料合成八官能团γ-氯丙基多面体低聚倍半硅氧烷(POSS),以该POSS为引发剂,通过原子转移自由基聚合(ATRP)合成具有星型结构的POSS/PMMA复合材料.通过傅立叶红外(FTIR)、核磁共振(NMR)、凝胶渗透色谱(GPC)和X-射线衍射(XRD)等手段对POSS和POSS/PMMA的化学组成和结构进行了表征,结果表明已经合成八官能团γ-氯丙基POSS,POSS/PMMA复合材料具有分子设计的预定结构,且复合材料的分子结构得到了较好的控制.通过ATRP法实现了POSS在聚合物中的单分散.此外,TGA的研究表明,POSS的引入提高了聚合物的热稳定性.
A star-shaped poly（methyl methacrylate） with polyhedral oligomeric silsesquioxane（POSS） as a core was synthesized by atom thansfer radical polymerization（ATRP）,using octa（γ-chloropropyl） POSS as a initiator and CuCl/2,2′-bipyridine as catalyst system.Octa（γ-chloropropyl） POSS was prepared in methanol through the hydrolysis and condensation of γ-chloropropyltriethoxysilane,and a yield of 28% was obtained.The well-defined structures of POSS and POSS/PMMA composite were fully characterized by FTIR,NMR,GPC and XRD,with results showing POSS molecule was successfully formed,and the mono-dispersion of POSS was achieved by ATRP,meaning that there was only one POSS molecule in a polymer chain.The polydispersity indices（PDI） of POSS/PMMA composite with different polymerization time were 1.20 and 1.14,according to the measurement of GPC.The TGA results indicated the thermal stability of POSS/PMMA composite enhanced from 281℃ to 303℃ with the increase of POSS content,which was due to the incorporation of POSS molecules.
出处
《高分子学报》
SCIE
CAS
CSCD
北大核心
2010年第1期10-14,共5页
Acta Polymerica Sinica
基金
国家自然科学基金(基金号50673023)
合肥工业大学学生创新基金(基金号XS08032)资助项目
