超支化聚合物的合成及其在涂料中应用研究进展

首先介绍了超支化聚合物(HBP)的化学性质,并与传统线性聚合物的优缺点进行比较,接着对HBP的AB2单体缩聚、自缩合乙烯基聚合、自缩合开环聚合等合成方式进行了介绍,并对将来HBP的合成发展方向进行了推测.对现有HBP合成方法和末端官能团改性对比发现,在不同涂料体系中对HBP进行相应的改性是需要解决的首要问题.功能化改性HBP可作为涂料添加剂或主要成膜物质,有效地改善了涂料的流动性,降低了涂料中有机溶剂的挥发.重点结合HBP对涂料领域研究进行了概述,并介绍了近年涌现的HBP制备新策略、新方法.通过对HBP合成方法的探讨和众多末端官能团的不同修饰进行分析、对比和总结,介绍了HBP在UV固化涂料、高固体分涂料、有机-无机杂化涂料中的应用现状.结合相关研究,分析了HBP增强涂膜性能机理.最后基于HBP在涂料领域的应用现状,对今后研究侧重点提出相关建议和展望.

Research Progress on Synthesis and Application in Coating of Hyperbranched Polymer

Hyperbranched polymer (HBP) has the characteristics of unique three-dimensional structure, numerous terminated functional groups, simple synthesis methods and so on, and has been paid more and more attention by researchers in various countries. The introduction of HBP into the coating, not only reduce the viscosity of the coating, but also increase the cross-link density of the coating system, while providing excellent adhesion, so it has become the hot spot in the field of coatings. This paper discussed the chemical properties of HBP, which also compared the relative merits of traditional linear polymers. Then the synthesis methods were introduced, which were polycondensation of AB2 monomers, self-condensing vinyl polymerization and self-condensing ring-open polymerization of HBP. The comparison of HBP synthesis methods and modification of terminated functional groups found that the corresponding changes to HBP in different coating systems are the primary problems that need to be solved. Functional modified HBP can be used as a coating additive or main film-forming substance, effectively improve the liquidity of coatings, reduce VOC in coatings, focus on the field of coating research in combination with HBP, and introduce the emergence of new HBP preparation strategies in recent years. Through the discussion of HBP synthesis method and summary the different modifications of numerous terminated functional groups, the application of HBP in UV curing coatings, high solid coatings, organic-inorganic hybrid coatings were introduced. Combined with related research, the mechanism of HBP coatings performance was analyzed. Finally, based on the application status of HBP in the field of coatings, give some suggestions and prospects for future research.