细乳液聚合制备纳米TiO2/丙烯酸酯共聚物复合乳液

使用甲基丙烯酸-3-三甲氧基硅烷（KH-570）对纳米TiO2粒子进行偶联处理,进一步通过细乳液聚合得到了内部包裹纳米TiO2粒子的核-壳型复合粒子。通过热重分析（TG）表征,表明纳米TiO2表面包覆约有9.13%-10.06%的KH-570。通过探讨乳化剂、助稳定剂用量与转化率的关系,结果显示：温度应控制在70℃,乳化剂用量为单体用量的2%,助稳定剂（HD）用量为单体用量的3%时,可以得到稳定的胶粒粒径分布较窄的细乳液。通过吸水率、拉伸强度和热重分析测试,表明纳米TiO2可以提高聚合物的耐水性、耐候性和拉伸强度。

NanO-TiO2/Acrylate Copolymer Compounded Emulsion Prepared by Means of Fine Emulsion Polymerization

Nano-TiO2 particles were coupled with 3-（trimethoxysilyl）propyl meth- acrylate （KH-570） and core-shell compounded particles wrapping up nano-TiO2 particles were further obtained by way of fine emulsion polymerization. Encapsulating nano-TiO2 particle surface with about 9.13%-10.06% KH-570 was characterized by means of thermogravimetric analysis （TG）. Exploration of relationship between contents of emulsifier, costabilizer and conversion rate showed that when emulsifier content was 2% of the monomer and coemulsifier （HD） was 3% of the monomer at a controlled temperature of 70℃, stable fine emulsion with narrow particle size distribution could be obtained. Tests on water absorption, tensile strength and thermal gravimetric analysis showed that nano-TiO2 could enhance water resistance, weatherability and tensile strength of the polymer.