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OALib Journal期刊
ISSN: 2333-9721
费用：99美元
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聚氨酯-聚甲基丙烯酸丁酯共聚体水分散体的制备及性能研究
DOI: 10.11777/j.issn1000-3304.2015.14367, PP. 624-632
Keywords: ARGET,ATRP,端羟基聚甲基丙烯酸丁酯,聚氨酯水分散体,共聚体,薄膜性能
Abstract:
研究了聚氨酯-聚甲基丙烯酸丁酯共聚体水分散体(PUBMA)的制备及其性能.首先采用电子转移再生催化剂原子转移自由基聚合(ARGETATRP),以α-溴代异丁酸羟丁酯为引发剂,溴化铜(CuBr2)为催化剂,五甲基二乙烯三胺(PMDETA)为配体,辛酸亚锡(Sn(EH)2)为还原剂,制备了端羟基聚甲基丙烯酸丁酯(PBMA-OH).其次以聚醚二元醇(N220)、聚醚三元醇(N330)、PBMA-OH、甲苯-2,4-二异氰酸酯(TDI)、二羟甲基丙酸(DMPA)为原料,制备聚氨酯-聚甲基丙烯酸丁酯共聚体水分散体(PUBMA).研究了PBMA-OH含量对PUBMA水分散体及其薄膜性能的影响.结果表明成功制备了聚氨酯-聚甲基丙烯酸丁酯共聚体水分散体.随着PBMA-OH含量的增加,乳液粒径增大,分布变宽;力学性能和耐水性测试表明其薄膜的拉伸强度增大,从6MPa增强至8MPa,断裂伸长率降低,由1500%降至800%,耐水性变好.通过原子力显微镜(AFM)和动态热机械分析(DMA)测试说明PUBMA呈现两相分离形态,并且随着PBMA-OH的含量增加,PUBMA的玻璃化转变温度升高.
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