Abstract:

An acetoacetoxy ethyl methacrylate (AAEM) as functional monomer was introduced into acrylic resin to form an acrylic emulsion which was then added with a certain amount of chitosan as crosslinking agent to give a series of novel ambient temperature selfcrosslinking acrylic resin-chitosan composite emulsion. The FT-IR spectra indicated that the crosslinked structure emerged in the composite films. Effects of the AAEM-chitosan systems on the performances of the composite films were investigated by water absorption, contact angle, glass-transition temperature (T_g)and mechanical properties analysis. The results indicated that the incorporation of chitosan and crosslinking reaction improved the mechanical properties and the water absorptivity of the composite films, as well as the excellent comprehensive performance of the film.

Key words: acrylic resin, chitosan, composite emulsion, ambient temperature self-crosslinking

摘要： 通过共聚将功能单体乙酰乙酸基甲基丙烯酸乙酯(AAEM)引入丙烯酸树脂分子链中,在制备的丙烯酸树脂乳液中添加壳聚糖,形成室温自交联型壳聚糖-丙烯酸树脂复合乳液。经FT-IR证实了壳聚糖与AAEM单体之间交联反应的发生,通过测试涂膜吸水率、接触角、T_g、抗张强度及断裂伸长率等,考察了AAEM-壳聚糖交联体系对乳液涂膜基本性能的影响。实验结果表明:壳聚糖的引入和相互交联网络的形成,可使涂膜具有更好的吸水性和优异的综合性能。

关键词: 丙烯酸树脂, 壳聚糖, 复合乳液, 室温自交联