采用蓖麻油、异佛尔酮二异氰酸酯(IPDI)、聚己内酯二元醇(PCL)和1,4-丁二醇(BDO)为主要原料,以乙二胺基乙磺酸钠(AAS)为亲水基,合成了一系列由蓖麻油改性的磺酸型水性聚氨酯乳液,并固化成膜.通过FT-IR、粒径测试、吸水率与接触角测定、力学性能测定、TG等手段研究了蓖麻油含量对水性聚氨酯乳液与胶膜的影响.结果表明:蓖麻油成功接入聚氨酯分子主链中;随着蓖麻油含量的增加,乳液粒径逐渐增大;胶膜的吸水率先减小后增大,接触角先增大后减小,拉伸强度先增大后减小,断裂伸长率逐渐减小.当蓖麻油与PCL质量比为0.5时,胶膜吸水率最小,接触角最大,为95.180,拉伸强度最大,为15.15 MPa,综合性能最好.通过TGA表明,蓖麻油的引入,胶膜的耐热性也有所提高.
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