玻纤网格布用有机硅改性聚丙烯酸酯乳液的制备与表征  

Synthesis and characterization of alkoxy silane modified polyacrylate emulsion for fiberglass mesh fabric

作　　者：付强[1] 范雪荣[1] 王强[1] 

机构地区：[1]江南大学纺织服装学院教育部生态纺织重点实验室,江苏无锡214122

出　　处：《新型建筑材料》2008年第6期44-48,共5页New Building Materials

基　　金：国家高技术研究发展计划(2007AA02Z218)

摘　　要：用于混凝土工程的玻纤网格布,需要具有柔软、定位好、强度高及耐碱腐蚀等优点,现有的玻纤网格布用聚丙烯酸酯乳液涂层存在着"热黏冷脆"、强度及耐碱性不高的缺点。通过核壳乳液聚合的方法,在壳层聚合中引入有机硅,制备一种改性聚丙烯酸酯乳液。制得的乳液涂层具有较好的柔软性、不黏连、强度高、耐碱强度保留率可达84.2%。利用红外光谱(FT-IR)对共聚物进行表征,表明有机硅与丙烯酸酯发生了共聚;共聚物胶膜DSC测试结果表明,有机硅用量较大时聚合物的Tg较理论值有所偏高;利用透射电子显微镜(TEM)观察改性聚丙烯酸酯胶膜,确认成功制备出了具有典型核壳结构的硅改性聚丙烯酸酯乳液。Fiberglass mesh fabric as reinforced material in concrete should have properties such as softness,good positioning, high strength and good alkali-resistivity. The conventional emulsion coating for fiberglass mesh fabric is tacky in hot circumstance and brittle in cold circumstance. It is also poor in strength and alkali-resistivity. A modified polyacrylate emulsion was prepared by core-shell polymerization and introducing an alkoxy silane to copolymerize with shell polymer. The emulsion coating showed good softness,high blocking resistance and high strength,and the retention rate of alkali-resistivity up to 84.2%. The copolymer was characterized by means of FT-IR spectrum which showed that alkoxy silane and acrylate were polymerized;the results of DSC tests showed that the Tg of polymer was slightly higher than theoretical value when the amount of alkoxy silane was higher;it was conformed that alkoxy silane modified polyacrylate emulsion with typical core-shell structure was prepared successfully by TEM observation.

关 键 词：核壳聚合 玻纤网格布 有机硅 聚丙烯酸酯 耐碱强度保留率 

分 类 号：TQ331.4[化学工程—橡胶工业]