引用本文:
卞新声, 陈钟笑, 张庆余. 液体氯丁二烯-甲基丙烯酸羟乙酯共聚物基聚氨酯-聚苯乙烯互穿网络聚合物[J]. 应用化学,
1986, 3(6): 15-19.
Citation: Bian Xinsheng, Chen Zhangxiao, Zhang Qingyu. POLYURETHANE BASED ON LIQUID CHLOROPRENE+HYDROXYETHYL METHACRYLATE COPOLYMER-POLYS-TYRENE INTERPENETRATING POLYMER NETWORKS(PU-ST-IPN)[J]. Chinese Journal of Applied Chemistry, 1986, 3(6): 15-19.
Citation: Bian Xinsheng, Chen Zhangxiao, Zhang Qingyu. POLYURETHANE BASED ON LIQUID CHLOROPRENE+HYDROXYETHYL METHACRYLATE COPOLYMER-POLYS-TYRENE INTERPENETRATING POLYMER NETWORKS(PU-ST-IPN)[J]. Chinese Journal of Applied Chemistry, 1986, 3(6): 15-19.
液体氯丁二烯-甲基丙烯酸羟乙酯共聚物基聚氨酯-聚苯乙烯互穿网络聚合物
摘要:
合成了一系列液体氯丁二烯-甲基丙烯酸羟乙酯共聚物(CP-HEMA)聚氨酯-聚苯乙烯互穿网络聚合物(PU-ST-IPN)。表征了物理性能和密度行为。密度效应在体系中较为明显,其增值为0.030g/cm3,同时其抗张强度的提高也是显著的。通过60%PU透射电镜照片,观察了微相分离形态结构。分散于PU相中的ST微区尺寸大约为500-4000Å。与PU-MMA-IPN体系比较,该体系相界分明,相分离程度大。直到60%PU,没有相转变发生,ST相是分散相,PU相是连续相。形成PU相的相对反应速率比苯乙烯的聚合速度快是造成上述现象的主要原因。微区尺寸分布和密度效应证明,此IPN体系在分散相的界面上两个网络是互穿缠结的。
English
POLYURETHANE BASED ON LIQUID CHLOROPRENE+HYDROXYETHYL METHACRYLATE COPOLYMER-POLYS-TYRENE INTERPENETRATING POLYMER NETWORKS(PU-ST-IPN)
Abstract:
A number of polyurethane based on liquid,chloroprene-hydroxyethyl methacrylate copolymer (CP-HEMA)-polystyrene (ST) interpenetrating polymer networks (PU-ST-IPN) were synthesized. Some physical properties were examined and density behavior was investigated.For 60% polyurethane (PU) system, the tensile strength and density were found to be increased clearly. Transmission electron micrographs showed the existence of phase separation and the sizes of ST domains dispersed in PU phase were esfimated about 500-4000Å. In comparison with correlative PU-MMA-IPN system, the IPN prepared had a more extensive phase separation and boundaries because of the higher compatibility in the PU-MMA-IPN.No phase inversion has been observed till up to 60% content of PU in system at which ST phase remained as a dispersed phase and PU as a continuous phase.It was considered as a result of the greater rate of PU formation than that of polymerization of ST. The relatively uniform distribution of domain size and the density effect indicated that the interentanglements between the two networks existed in the system, to some extent, would cause the incompatible system to become a partially compatible one.
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