以乙烯基封端的聚二甲基硅氧烷(PDMS)为基胶,聚甲基丙烯酸甲酯(PMMA)微球为致孔剂,乙酸乙酯为溶剂,通过悬浮聚合法制备多孔硅橡胶微球。利用傅里叶变换红外光谱仪、激光粒度分布仪、热重分析仪、偏光显微镜、扫描电子显微镜、透光率/雾度测定仪等对多孔硅橡胶微球的结构和性能进行表征。结果表明:随着致孔剂用量的增加,多孔硅橡胶微球平均粒径先增大后减小,微球表面孔径分布均匀;随着搅拌速率的提高,多孔硅橡胶微球平均粒径缩小;在搅拌速率800r/min、PMMA微球用量1.5g、溶剂用量12.5g条件下,合成的多孔硅橡胶微球的孔径分布均匀且孔洞较深,具有较好的热稳定性,可以提高PMMA膜材的雾度。
Using vinyl terminated polydimethylsiloxane (PDMS) as the substrate,polymethyl methacrylate (PMMA) microspheres as the porogen and ethyl acetate as the solvent,the porous silicone rubber(SR) microspheres was prepared by suspension polymerization.The structure and properties of the microspheres were characterized by FT-IR,laser particle size distribution analyzer,TGA,polarized light microscope,SEM,light transmittance and haze tester.The results showed that with increasing the amount of porogen,the particle size of the microspheres first increased and then decreased,and the pore size distribution was uniform.As increasing the stirring rate,the particle size of the microspheres decreased.Under the condition of stirring rate of 800r/min,PMMA microspheres of 1.5g and solvent dosage of 12.5g,the microspheres had uniform pore size distribution and deep pores,which had good thermal stability and can be used to improve the haze of the PMMA film.
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基金资助
常州市科技支撑计划(工业)(CE20170029);江苏省大学生创新创业(201610292036Y);江苏高校品牌专业建设工程资助项目(TAPP);江苏高校优势学科建设工程资助项目(PAPD);武进区科技局双十百千项目;深圳市基础研究项目(JCYJ20170818114324998)
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