TPEE/P(AA-co-AM)吸水膨胀弹性体的制备及性能研究  

Preparation and properties of TPEE/P(AA-co-AM)water absorbent elastomer

作　　者：胡焕波 吴唯 李宁 赵天瑜 邹志强 HU Huanbo;WU Wei;LI Ning;ZHAO Tianyu;ZOU Zhiqiang(Sino-German Joint Research Center of Advanced Materials,School of Material Science and Engineering,East China University of Science and Technology,Shanghai 200237,China;OECHSLER Plastic Products(Taicang)Co,Ltd,Suzhou 215400,China)

机构地区：[1]华东理工大学材料科学与工程学院,中德先进材料联合研究中心,上海200237 [2]裕克施乐塑料制品(太仓)有限公司,江苏苏州215400

出　　处：《中国塑料》2022年第3期9-14,共6页China Plastics

摘　　要：针对吸水膨胀弹性体(WSE)在含盐溶液中膨胀倍率普遍不高、吸盐水性能和耐热性能不佳等问题,采用反向悬浮聚合方法,将丙烯酸(AA)单体与丙烯酰胺(AM)单体进行共聚,制备了新型聚丙烯酸-丙烯酰胺[P(AA-co-AM)]耐盐吸水树脂,并以热塑性聚醚酯弹性体(TPEE)为基体,制备了TPEE/P(AA-co-AM)吸水膨胀弹性体。研究了单体AA:AM质量比、交联剂N,N-亚甲基双丙烯酰胺(NMBA)含量对P(AA-co-AM)吸水性能的影响,并将TPEE分别与自制P(AA-co-AM)耐盐吸水树脂和市售吸水树脂CPNaAA共混制成的WSE的吸水性能和力学性能进行了比较。结果表明,当AA∶AM质量比为2.5∶1、NMBA含量为0.05%(质量分数,下同)、过硫酸钾(KPS)含量为0.70%、油相溶液与水相溶液质量比为2.5∶1时,P(AA-co-AM)吸蒸馏水和吸盐水综合效果最佳;P(AA-co-AM)对蒸馏水和对盐水的吸水倍率均高于市售吸水树脂CPNaAA,其中对盐水吸水倍率的增幅更明显;TPEE/P(AA-co-AM)的吸水膨胀性能优于TPEE/CPNaAA。To address the problems of low expansion rate in saline solution,poor saltwater absorption performance,and heat resistance of water absorbent elastomer(WSE),a new type of polyacrylic acid acrylamide[P(AA-co-AM)]salt-resistant water absorption resin was prepared through reverse suspension polymerization using acrylic acid(AA)and acrylamide(AM)as monomers. A water-absorbent expansive elastomer based on the thermoplastic polyether ester elastomer(TPEE)and P(AA-co-AM)blend. The effects of monomer ratio of AA to AM and crosslinking agent(N,N’-methylene bisacrylamide,NMBA)content on the water absorption properties of P(AA-co-AM)were studied. Moreover,the water absorption properties and mechanical properties of WES prepared by self-made P(AA-co-AM)salt-resistant water absorption resin were investigated comparatively with a commercial water absorption resin,CPNaAA. The results indicated that P(AAco-AM)exhibited optimal water absorption and water absorption performance at a mass ratio of AA to AM of 2. 5∶1,a NMBA content of 0. 05 wt%,a KPS content of 0. 70 wt%,and a mass ratio of oil phase solution to water phase solution of2. 5∶1. The water absorption rate of P(AA-co-AM)to distilled water and brine was higher than that of the commercial water absorption resin. The increase of water absorption rate to brine was more significant. The TPEE/P(AA-co-AM)water-absorption expansive elastomer presented a fast water absorption rate at the initial stage,and its water absorption rate reached80 wt% within 20 h. Then,the water absorption rate decreased gradually. The water-absorption expansive elastomer exhibited higher simultaneous water absorption rate,saturated water absorption rate,saturated water absorption time,the expansibility,extensibility,and flexibility after water absorption than those before water absorption. In summary,the TPEE/P(AA-co-AM)blend can act as a water-absorption expansive elastomer with excellent comprehensive performance.

关 键 词：吸水树脂 丙烯酸 丙烯酰胺 热塑性聚醚酯弹性体 吸水膨胀弹性体 

分 类 号：TQ325.7[化学工程—合成树脂塑料工业]