水性丙烯酸—聚氨酯微乳液的制备及粒子形态

水性聚氨酯作为一种环境友好材料近年来得到了迅速的发展，并以其优良的性能在皮革业、涂料、印刷、油墨等行业呈现广阔的应用前景［‘’‘j．通常采用IPN等技术制备出复合型水性树脂「‘，‘’，其中具有核壳结构的微乳液尤其受到重视．但研究多集中于微米级乳液的实际应用开发，对于纳米级、杂化型聚氨酯微乳液微观结构的研究却少见报道．本文通过在自乳化聚氨酯中自由基引发聚合丙烯酸类单体，制备出了具有核／壳结构的复合型丙烯酸一聚氨酯微乳液，并对微乳液的粒径、粒径分布、粒子形态及交联结构进行了研究．聚己内酯（220AL），日…

The Particle Size and Morphology Studies of Waterborne Acrylic-Polyurethane Hybrid Microemulsions

Core/shell type acrylic-polyurethane hybrid microemulsions in which polyurethaneas the shell and acrylic polymer as the core were prepared successfully. Different cross-link-ing structures between core and shell can be formed by introducing hydroethyl acrylate andadipoyl dihydrazine at the ends of the polyurethane chains. The photon correlation spec-troscopy studies revealed that the mean particle size of the emulsions were smaller than 200nm. The particle morphology results revealed the core/shell structure of the uncross-linkingtype microemulsions and interpenetrating networks of the cross-linking type microemulsions.