摘要
利用表面接枝的方法,在纳米TiO2上接枝偶联剂-γMPS(3-(三甲氧硅基)丙基异丁烯酸)形成"杂化"单体,通过加入引发剂引发甲基丙烯酸甲酯(MMA)在粒子表面发生自由基聚合,形成PMMA/γ-MPS/TiO2纳米复合粒子。通过IR、元素分析、TGA等方法表征了PMMA/-γMPS/TiO2纳米复合粒子的结构,定量研究了TiO2/-γMPS单体接枝率和转化率,PMMA/-γMPS/TiO2纳米复合粒子的接枝率及其相应的影响因素。结果表明:PMMA以化学键的形式连接在纳米TiO2粒子表面并具有较高的接枝率。
γ-MPS [ 3-（trimethoxysilyl） propyl methacrylate ] have been grafted onto the surface of TiO2 to form organic-inorganic hybrid ＇macromonomers＇ Poly （methyl methacrylate）/TiO2 nanocomposite particles were synthesized in high yield via free radical polymerization. The nanocomposite particles was characterized by FT-IR spectroscopy, elemental analysis and TGA. Quantification of γ-MPS and PMMA grafting has been determined. The influence of the relative amount of silane used has been studied. It is demonstrated that Poly （methyl methacrylate） shell is chemically bonded to nano TiO2 core surface with a high coating efficiency.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
2008年第2期27-30,共4页
Polymer Materials Science & Engineering
