Water\|soluble hyperbranched copoly(ester\|amine)s with various degree of branching (DB) were prepared \%via\% the "A\-2+B\-2+BB′\-2" approach. Due to the faster reaction between A and B functional groups, ...Water\|soluble hyperbranched copoly(ester\|amine)s with various degree of branching (DB) were prepared \%via\% the "A\-2+B\-2+BB′\-2" approach. Due to the faster reaction between A and B functional groups, the intermediate containing one A group and two B′ groups was generated\% in situ\%. Further self\|polyaddition of the AB′\-2 intermediate gave hyperbranched polymer. In this communication, A\-2 is ethylene diacrylate (EDA), B\-2 is piperazine (PZ), and BB′\-2 is 1\|(2\|aminoethyl)piperazine (AP). The combination of mass spectrum and \%in situ\% FTIR determined the reaction mechanism and propagating paths predicted. DB of the resulting branched poly(ester\|amine)s decreases with increasing the feed ratio of PZ to AP. In the same molecular weight, the inherent viscosity of the polymers presented here increases with decreasing DB. The simplicity of the reaction process, the controllability of the architecture, and the commercially availability of the raw materials would make this approach attractive in the large scale manufacture and application of hyperbranched polymer materials.展开更多
文摘Water\|soluble hyperbranched copoly(ester\|amine)s with various degree of branching (DB) were prepared \%via\% the "A\-2+B\-2+BB′\-2" approach. Due to the faster reaction between A and B functional groups, the intermediate containing one A group and two B′ groups was generated\% in situ\%. Further self\|polyaddition of the AB′\-2 intermediate gave hyperbranched polymer. In this communication, A\-2 is ethylene diacrylate (EDA), B\-2 is piperazine (PZ), and BB′\-2 is 1\|(2\|aminoethyl)piperazine (AP). The combination of mass spectrum and \%in situ\% FTIR determined the reaction mechanism and propagating paths predicted. DB of the resulting branched poly(ester\|amine)s decreases with increasing the feed ratio of PZ to AP. In the same molecular weight, the inherent viscosity of the polymers presented here increases with decreasing DB. The simplicity of the reaction process, the controllability of the architecture, and the commercially availability of the raw materials would make this approach attractive in the large scale manufacture and application of hyperbranched polymer materials.
