【摘要】 以三羟甲基丙烷三丙烯酸酯（TMPTA）、甲基丙烯酸甲酯（MMA）、苯乙烯（St）、丙烯酸正丁酯（BA）、2-甲基-2-丙烯酸十三烷基酯（TDMA）、硅酸乙酯（TEOS）和γ-甲基丙烯酰氧丙基三甲氧基硅烷（MPS）为反应单体,聚四氟乙烯（PTFE）分散液作种子,通过原位聚合法和种子乳液法制备出纳米SiO₂、PTFE协同改性的丙烯酸酯（SiO₂/PTFE/PA）复合乳液。利用傅里叶变换红外光谱仪、透射电子显微镜、扫描电子显微镜、热重分析仪和接触角/界面张力测量仪对复合乳液的结构与性能进行了表征和测试。结果表明:当PTFE占体系中丙烯酸酯类单体总质量16%、纳米SiO₂用量为2.4%（质量分数）时,复合乳液平均粒径为151nm,胶膜表面水接触角为112.3°,吸水率为3.8%;在热失重5%和10%条件下,纳米SiO₂/PTFE/PA胶膜热分解温度分别为347.7℃和375.5℃,相比改性丙烯酸酯胶膜热分解温度分别提高了59.6℃和27.7℃,疏水性和耐热性均有显著提高。更多还原

【Abstract】 The nano-SiO₂/PTFE modified acrylate emulsion was prepared by in-situ polymerization and seed emulsion polymerization with trihydroxymethylpropyl trimethylacrylate（TMPTA）,methyl methacrylate（MMA）,styrene（St）,butyl acrylate（BA）,tridecyl methacrylate（TDMA）,ethyl silicate（TEOS）andγ-methacryloxypropyltrimethoxysilane（MPS）as monomer,and PTFE dispersion liquid as seeds.The structure and properties of polymers were characterized and tested by FT-IR,TEM,SEM,TG and water contact angle measurement.The results showed that when the amount of PTFE dispersion was 16% and nano-SiO₂ content was 2.4%,the average particle size of emulsion was 151 nm and the surface water film contact angle was 112.3°,the water absorption rate was 3.8%,the characteristic decomposition temperature at 5% and 10% weight loss were 347.7℃ and 375.5℃,compared with the pure acrylate decomposition temperature increased by 59.6°and 27.7°respectively.The hydrophobic resistance and heat resistance were significant to improve.更多还原