R值对PPCD型自消光水性聚氨酯性能的影响  

Synthesis and Properties of PPCD-type Self-matting Waterborne Polyurethane

作　　者：萧毅恒 刘保华[1] 宋丽娜[1] XIAO Yiheng;LIU Baohua;SONG Lina(School of Materials and Energy,Guangdong University of Technology,Guangzhou 510006,China)

机构地区：[1]广东工业大学材料与能源学院,广东广州510006

出　　处：《聚氨酯工业》2023年第4期24-27,共4页Polyurethane Industry

基　　金：广东省应用型科技研发专项资金项目(编号15ZK0493);广州市科技计划(编号17ZK0022);二氧化碳聚合物应用研究项目(20HK0202)。

摘　　要：以聚碳酸亚丙酯二醇(PPCD)、二羟甲基丙酸(DMPA)及2-[(2-氨基乙基)氨基]乙磺酸钠(AAS)等为主要原料,成功合成脂肪族自消光水性聚氨酯(SMWPU)乳液及薄膜,探讨异氰酸酯指数(R值)对SMWPU性能的影响。研究结果表明:当R值由1.7增加到2.1,乳液粒径迅速增加,薄膜表面粗糙度增加,60°光泽迅速下降,紫外-可见光透过率减小。当R值为1.9时,SMWPU各项性能最佳,薄膜的60°光泽度为4.7、紫外-可见光透过率70%、拉伸强度49.1 MPa、断裂伸长率988%。A aliphatic self-matting waterborne polyurethane(SMWPU)was prepared using polypropylene carbonate diol(PPCD),2,2-hydroxymethylpropionic acid(DMPA)and 2-[(2-aminoethyl)amino]ethanesulfonic acid sodium salt(AAS)as raw materials.The effect of isocyanate index(R value)on the performance of the film were studied.The results showed that,when the R value increased from 1.7 to 2.1,the particle size of the lotion increased rapidly,the surface roughness of the film increased,the 60°glossiness decreased rapidly and the UV visible light transmittance decreased.When the R value was 1.9,SMWPU had the best performance with the 60°glossiness of the adhesive film was 4.7,the UV visible light transmittance was 70%,the tensile strength was 49.1 MPa and the elongation at break was 988%.

关 键 词：聚碳酸亚丙酯二醇 自消光 水性聚氨酯 低光泽 

分 类 号：TQ323.8[化学工程—合成树脂塑料工业]