摘要
以钛酸丁酯为前驱体,在亚化学计量的水中水解,以硅烷偶联剂（MPMS）和丙烯酸为改性剂,采用溶胶-凝胶法制得均一、稳定的淡黄色二氧化钛溶胶,透射电镜分析粒径约20-30nm;在溶胶中加入甲基丙烯酸甲酯（MMA）和偶氮二异丁腈（AIBN）,采用热固化方法制得淡黄色透明的PMMA/TiO2块体材料;通过TEM、FT-IR、DSC和TG表征杂化材料的微观结构和热性能。研究表明,杂化材料中PMMA和TiO2是以共价键连接的,TiO2均匀分散在PMMA中,两相之间没有明显的相分离现象;当w（TiO2）=20%时,杂化材料的玻璃化转变温度为175℃,比纯PMMA提高了约70℃,分解温度为300℃,比纯PMMA提高了120℃。
Titanium oxide sol is synthesized from inorganic salt precursors butyltitanate, MPMS and acrylic acid by hydrolysis and condensation in water solvent. The thermal stabilities and micro-structure of the PMMA/TiO2 hybrid materials are characterized with TEM, FT-IR, DSC and TG. The studies reveal that the diameter of the particle is about 20-30nm and the existence of covalent bonds between organic phase and inorganic phase demonstrate the miscibility of the two species has been improved greatly by cross-linker treatment; the glass transition temperature and thermal decomposition temperature of PMMA/TiO2 hybrid material including 20wt% of TiO2 are increased by 70℃ and 120℃ correspondingly.
出处
《材料导报》
EI
CAS
CSCD
北大核心
2009年第8期95-97,共3页
Materials Reports
基金
国家863计划(2007AA804128)
