环氧大豆油改性水性聚氨酯的制备及性能表征

Preparation,characterization and performance testing of epoxy soybean oil modified waterborne polyurethane

用二乙醇胺按照不同比例将环氧大豆油中的部分环氧基开环,然后以不同的添加量引入到水性聚氨酯链段中,合成出环氧大豆油改性的水性聚氨酯乳液。通过FT-IR表征及改性前后性能比较,表明部分开环的环氧大豆油是以化学键和的方式接入到聚氨酯分子链段中的。性能测试结果显示:经环氧大豆油改性的乳液的粒径变大,储存稳定性略有下降;改性后胶膜的拉伸强度增加,断裂伸长率下降,耐热性有提高。

Using diethanol amine to open loops in epoxy soybean oil,and then introduced them into polyurethane to synthesize a series of epoxy soybean oil modified waterborne polyurethane.FT-IR showed that epoxy soybean oil was brought in polyurethane with chemical bond.The results as follows：by modified with epoxy soybean oil,the emulsion particle size was increased,and storage stability was decreased;tensile strength was increased and elongation at break down was decreased.;the heat resistance of the modified resein was increased.