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高硅含量硅-苯丙乳液的合成及性能研究

Study on Synthesis and Performance of Alkylsilane Modified Polystyrene(PS)-Polyacrylate(PA) Emulsion with High Alkylsilane Content

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【作者】 刘兴邱藤何立凡张胜文李效玉

【Author】 Liu Xing,Qiu Teng,He Lifan,Zhang Shengwen,Li Xiaoyu(Group of Emulsion Polymerization,School of Material Science and Engineering,State Key Laboratory of Organic-Inorganic Composites,Key Laboratory of Carbon Fiber and Functional Polymers,Ministry of Education,Beijing University of Chemistry Technology,Beijing 100029,China)

【机构】 北京化工大学材料科学与工程学院乳液聚合研究室有机无机复合材料国家重点实验室碳纤维和功能高分子教育部重点实验室

【摘要】 以甲基丙烯酸甲酯(MMA)、丙烯酸丁酯(BA)、苯乙烯(St)为主要原料,以乙烯基三甲氧基硅烷(A-171)为改性单体,以烯丙基聚乙氧基磺酸盐(SE-10N)和十二烷基苯磺酸钠(DSB)为混合乳化剂,采用水溶性引发剂过硫酸铵(APS)和亚硫酸氢钠(SBS)与油溶性引发剂偶氮二异丁腈(AIBN)2种引发体系相配合的方式,通过烷氧基硅烷和苯乙烯混合单体对丙烯酸酯种子乳液先渗透溶胀,再进行聚合的方法(单体渗透法)合成了A-171含量高达50%的硅-苯丙乳液。利用傅里叶变换红外光谱仪对聚合物结构进行了分析,证明了A-171的引入,通过透射电子显微镜(TEM)对粒子形态、粒径分布进行了表征,用原子力显微镜(AFM)、扫描电子显微镜(SEM)相结合的方法对乳液的成膜性能以及成膜助剂的作用进行了分析。最后通过性能测试证明,A-171含量的提高有利于降低涂膜的吸水率,增强涂膜的热稳定性。

【Abstract】 A stable alkylsilane modified polystyrene(PS)-polyacrylate(PA) emulsion with high alkylsilane content(50%) was prepared via a monomer penetration method.In the synthesis,methyl methacrylate(MMA),butyl acrylate(BA),styrene(St) were used as main monomers,and vinyl trimethoxysilane(A-171) as the modification monomer,1-nonylphenyloxy-2-deca(oxyethylene)-3-allyloxypropane ammonium sulfate(SE-10N) and sodium alkylated diphenyl ether disulfonate(DSB) as emislsifiers,water-soluble ammonium persulfate(APS),sodium bisulfate(SBS) and oil-soluble 2,2’-azobis(isobutyronitrile)(AIBN) as compound initiator system.A-171 was pre-mixed with St and swelled in the PA seed emulsion for the stable polymerization of A-171 with high content.The structure of the copolymer was analyzed by Fourier transform infrared spectroscopy(FT-IR).The size and structure of latex particles were analyzed by transmission electron microscope(TEM).The scanning electron microscope(SEM) and atomic force microscope(AFM) were applied to characterize the film-forming performance and function of coalescente.Furthermore,the effects of A-171 content on the water absorption and heat resistance properties of the latex films were studied.The results showed that the introduction of A-171 with high content could effectively reduce the water absorption and improve the heat resistance of latex films.

  • 【文献出处】 涂料工业 ,Paint & Coatings Industry , 编辑部邮箱 ,2012年11期
  • 【分类号】TQ630.43
  • 【下载频次】169
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