通过无皂-原位乳液聚合法,以甲基丙烯酸甲酯、丙烯酸丁酯为原料,采用反应性乳化剂1-烯丙氧基-3-（4-壬基苯酚）-2-丙醇聚氧乙烯醚硫酸铵（DNS-86）制备聚丙烯酸酯/纳米TiO2复合材料。采用红外光谱（FT-IR）、动态激光光散射（DLS）、透射电镜（TEM）等检测手段对复合材料的结构进行了表征,通过力学性能、耐水性测试研究了纳米TiO2对复合材料性能的影响。FT-IR测试结果表明纳米TiO2与聚合物发生了相互作用,有少量的TiO2被接枝到聚合物分子中。DLS测试结果表明与纯聚丙烯酸酯相比,聚丙烯酸酯/纳米TiO2复合乳液乳胶粒的平均粒径和粒径分布都有所降低。TEM测试结果表明纳米TiO2分布在聚合物基体中。复合材料的性能测试结果表明,当纳米TiO2的加入量为0.5%时,聚丙烯酸酯/纳米TiO2复合材料的综合力学性能较好;纳米TiO2的加入可提高复合材料的耐水性。
Polyacrylate/nano-TiO2 composite was prepared through emulsion-free in-situ polymerization stabilized with polymerizable surfactant allyloxy nonylphenol propyl polyoxyethylene ether sulfate（DNS-86）.The structure of the composite were characterized by fourier transform infrared spectroscopy（FT-IR）,dynamic laser light scattering（DLS）,transmission electron microscopy（TEM） analysis.Effect of nano-TiO2 on the properties of composite were studied by mechanical properties and water resistance test.FT-IR analysis showed a small amount of nano-TiO2 was grafted to the polymer.DLS analysis indicated both the average diameter and the polydispersion index of polyacrylate/nano-TiO2 composite latex decreased in compared with pure polyacrylate.TEM analysis demonstrated TiO2 was distributed in polymers.The result of properties analysis shows polyacrylate/nano-TiO2 composite has better mechanical properties when the dosage of TiO2 is 0.5%.Nano-TiO2 can improve water resistance of polyacrylate.
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