溶胶-凝胶法制备PEW/SiO_2杂化材料及表征  

Preparation and characterization of PEW/SiO_2 hybrid materials

作　　者：龚方红[1] 刘春林[1] 刘庆广[1] 王利娜[1] 陶国良[1] 

机构地区：[1]江苏工业学院材料科学与工程系,江苏常州213016

出　　处：《化工学报》2007年第12期3197-3201,共5页CIESC Journal

基　　金：江苏省高校自然科学基金项目(05KJB430024)~~

摘　　要：通过熔融接枝反应将乙烯基三甲氧基硅烷(VTMS)接枝到聚乙烯蜡(PEW)分子链上,接枝物红外光谱(FTIR)的1090、1030、960cm-1等处出现了—Si—O—CH3的特征吸收峰。以正硅酸乙酯(TEOS)为前驱体,混入接枝PEW中,通过溶胶-凝胶法(sol-gel)制备了PEW/SiO2杂化材料。使用透射电镜(TEM)和热重分析(TG)研究了杂化材料的形态及性能,结果表明,通过sol-gel可以制备SiO2含量为0.98%～4.12%的杂化材料,SiO2颗粒与PEW接枝物分子间具有良好的相容性,纳米SiO2的存在提高了PEW的耐热性能,当SiO2含量为3.75%时,PEW的分解温度提高了21.34℃。The molt grafting reaction was employed to graft vinyl trimethoxysilane（VTMS）to polyethylene-wax（PEW）,and the characteristic absorbance peaks at 1090 cm-1,1030 cm-1and 960 cm-1in FTIR spectra proved the successful grafting.As a precursor,tetraethoxysilane（TEOS）was mixed with grafted PEW and then a PEW/SiO2 hybrid material could be prepared by the sol-gel process.The morphology and properties of the hybrid were studied with FTIR,TEM and TG/DTA.The study indicates that the hybrid containing 0.98%—4.12% of SiO2 could be prepared via the sol-gel process and good compatibility of the molecules of grafted PEW and SiO2 particles was observed.The study also showed that the thermostability of PEW was improved at the presence of nano-SiO2particles.The decomposing temperature of PEW was increased by 21.34℃ when 3.75% of SiO2 was present.

关 键 词：聚乙烯蜡 乙烯基三甲氧基硅烷 溶胶凝胶法 正硅酸乙酯 杂化材料 

分 类 号：O631.13[理学—高分子化学]