交联型水性聚氨酯-丙烯酸酯复合乳液的制备及其胶膜性能研究  

Study on the synthesis of crosslinking waterborne polyurethane-acrylic composite emulsion and the film properties

作　　者：王学川[1] 宗奕珊[1] 强涛涛 

机构地区：[1]陕西科技大学教育部轻化工助剂化学与技术重点实验室,西安710021 [2]陕西农产品加工技术研究院,西安710021

出　　处：《功能材料》2014年第13期13111-13115,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(21276151);中国博士后科学基金资助项目(2012M521733);陕西省重点科技创新团队资助项目(2013KCT-08);陕西科技大学创新团队资助项目(TD12-04)

摘　　要：采用原位聚合的方法,以异佛尔酮二异氰酸酯（IPDI）、聚碳酸酯二元醇（PCDL-1000）、1,4-丁二醇（BDO）、2,2-二羟甲基丙酸（DMPA）、丙烯酸缩水甘油酯（GMA）等为主要原料,合成交联型水性聚氨酯-丙烯酸酯复合乳液（WPUA）。系统研究了交联剂用量对复合乳液及其胶膜性能的影响,并通过FT-IR、TGA、XRD、SEM表征了复合乳液及其胶膜的结构和性能。结果表明,适度交联能够提高材料的力学性能及耐水性能,当n（GMA）/n（DMPA）=0.1~0.2时,所得WPUA乳液性能稳定,聚合物具有良好的热稳定性及耐水性,吸水率低至5.4%;拉伸强度达到28.9 MPa,较未交联胶膜的拉伸强度提高了173%。A novel emulsion of crosslinked waterborne polyurethane-acrylic copolymers （PUA）was successfully synthesized by in-situ emulsion copolymerization method in this paper,using IPDI,PCDL-1000,BDO,DMPA, GMA as the main raw material.The effects of the content of crosslinking agent on the properties of composite emulsion and its films was studied systematically.FT-IR,TGA,XRD,SEM were employed to investigate the structures and properties of the composite latex and their polymers.The results showed that moderate crosslinking could contribute to improving the water resistance and mechanical properties of materials.When n（GMA）/n（DMPA）=0.1-0.2,the WPUA latex has a stable performance as well as an excellent thermal stabil-ity and water resistance of the polymer,the bibulous rate of the crosslinked films was low to 5 .4%.The tensile strength of the crosslinked WPUA films achieved 28.9 MPa,increased by 173% of the uncrosslinked one.

关 键 词：水性聚氨酯 丙烯酸酯 交联 改性 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业] TQ630.7