论文部分内容阅读
利用亲核取代反应,从一种新型AB2型单体,3-氯-4-腈基,(3’,5’-二甲氧基)二苯醚合成了超支化树脂,并分离出相对分子质量为233600的可溶性、低黏度超支化聚合物。利用1H NMR和GPC考查了该聚合过程。数据表明当数均分子质量达到稳定值后,重均分子质量增加。制备的模型化合物与最后生成的聚合物的波谱分析(1H、DEPT、13C NMR和MS)表明,在链增长过程中包含了醚交换与环化反应,这些副反应会影响聚合反应。最后生成的聚合物与其他的超支化芳香体系一样在有机溶剂中具有良好的溶解性。端羟基超支化聚合物甚至在水基体系中也是可溶的。
Hyperbranched resins were synthesized from a novel AB2 monomer, 3-chloro-4-nitrile, (3 ’, 5’-dimethoxy) diphenyl ether using a nucleophilic substitution reaction and the relative molecule Soluble, low viscosity hyperbranched polymer with 233600 mass. The polymerization was examined by 1H NMR and GPC. The data shows that as the number average molecular mass reaches a steady value, the weight average molecular weight increases. Spectral analysis (1H, DEPT, 13C NMR and MS) of the prepared model compound and the resulting polymer showed that ether exchange and cyclization reactions were involved in chain growth, and these side reactions affected the polymerization reaction. The resulting polymer, like other hyperbranched aromatics, has good solubility in organic solvents. Hydroxy-terminated hyperbranched polymers are also soluble even in water-based systems.