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Lys(z)-NCA was synthesized in the presence of triphosgene, amphiphilic triblock copolymers poly(N^c-CBZ-Lysine)-PEG-poly(N^c-CBZ-Lysine) were synthesized in DMF using amino-end ended PEG as initiator with the mechanism of anion ring opening polymerization. The structures of block copolymers were characterized by IR, ^1H-NMR,GPC and DSC. The results showed triblock copolymers with expected structure and low polydispersity in molecular weight could be synthesized by this method. At the same time, the self-assembling behaviors of block copolymer were investigated by TEM. A novel helical aggregates were found to be formed in DMF. Because of biocompatibility of two components of block copolymers, these block copolymers have potential applications in the field of biomaterials. 相似文献
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以KCl、KBr、KI、KNO3为支持电解质,在pH为1.5~3.0范围内,研究了Zn(Ⅱ)与水溶性的中位-四(4-N-氰乙基吡啶基)卟啉(TγNPNPyP)的反应动力学,利用计算机线性回归拟合,给出了其表观速率常数的一般表达式.研究表明,Zn(Ⅱ)与T γNPNPyP嵌入反应速率顺序为KCl介质>KBr介质>KI介质>KNO3介质,这与Zn(Ⅱ)和Cl-、Br-、I-、NO3-形成配合物的稳定性是一致的,表明平衡阴离子也参与了配位. 相似文献
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离子型共聚单体参与下的全氟丙烯酸酯无皂乳液共聚 总被引:4,自引:0,他引:4
离子型共聚单体参与下的全氟丙烯酸酯无皂乳液共聚;全氟烷基丙烯酸酯;无皂乳液;离子型共聚单体 相似文献
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聚丁二烯聚氨酯弹性体的合成与表征 总被引:1,自引:0,他引:1
以端羟基聚丁二烯(HTPB)、甲苯二异氰酸酯(TDI)、1,4—丁二醇(BDO)为原料,采用溶液二步法合成了4种硬段含量不同的聚丁二烯聚氨酯弹性体。探讨了反应温度、溶剂对反应速率的影响,并用红外光谱(IR)、差示扫描量热法(DSC)、应力—应变(σ—ε)实验对产物进行了表征。 相似文献
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嵌段共聚物在乳液聚合和分散聚合中的应用 总被引:4,自引:0,他引:4
综述了嵌段共聚物在乳液聚合和分散聚合中作为稳定剂应用的进展,主要讨论了共聚物化学组成,比例,分子量,浓度以及胶束形成等因素对聚合体系的影响。 相似文献