苯乙烯-丙烯酸酯改性水性聚氨酯复合乳液的研制.pdf

苯乙烯一丙烯酸醋改牲水牲聚氧醅 复合乳液的研索Ij 张辉，傅和青，黄洪，陈焕钦 (华南理工大学化工与能源学院，广东 广州 510640) 摘要：以双丙酮丙烯酰胺为交联剂，苯乙烯和丙烯酸酯为改性剂，进行自由基引发聚合，制备了高性能的苯乙烯一丙烯酸酯改 性水性聚氨酯复合乳液。采用红外光谱和示差扫描量热法对乳液进行了分析，讨论了改性剂、St和交联剂的用量对乳液和胶膜性 能的影响。实验结果表明，当改性剂苯丙乳液的用量为28％，其中St用量为 15％、交联剂用量为2％时，改性的复合乳液综合性能 较佳。 m 关键词：苯乙烯；丙烯酸酯；水性聚氨酯；复合乳液 o 中图分类号：TQ331．4 文献标识码：A 文章编号：1001—702X(2008)12-0074—03 c . Developmentofwaterbornepolyurethanehybrid emulsion modified by styrene-acrylate g ZHANG Hui，FU Heqing，HUANG Hong，CHEN Huanqin n (SchoolofChemicalandEnergyEngineering，South ChinaUniversityofTechnology，Guangdong510640，Guangzhou，China) o Abstract：Highperformancestyrene—acrylatemodifiedwaterbornepolyurethane (WPU)emulsionwaspreparedusingdiacetone l acrylamide(DAAM)ascross-linker，styrene (St)andacrylateasmodifyingagentand byfreeradicalinitiatedpolymerization．The u structure and propertiesof emulsion were analyzed by infrared spectrum and differentialscanning calorimetry．The effects of h modifying agent，Stand cross-linkercontenton performance ofemulsion and film were discussed．The experimentresults showed z thatallroundperformance ofmodified hybrid emulsion isbetterwhen contentofmodifying agent styrene—acrylateemulsion is . 28％，ofwhich StcontentiS 15％ andcross—linkercontentiS2％． w Key words：styrene；acrylatewaterbornepolyurethane