聚醚软段对光固化水性聚氨酯纳米复合乳液性能的影响∗

摘要

分别以聚氧乙烯⁃聚氧丙烯⁃聚氧乙烯（ PEO⁃PPO⁃PEO）、聚丙二醇（ PPG）和聚四氢呋喃均聚醚二醇（ PTMG）为聚醚组分，通过丙酮法合成光固化水性聚氨酯（ WPU）／二氧化硅（ SiO2）纳米复合乳液。研究了聚醚组分对复合乳液粒径、复合膜微观结构和动态力学性能的影响。研究表明，聚醚软段的不同结构对WPU及其纳米复合乳液的粒径、纳米SiO2的分散性以及纳米复合膜的微结构和动态力学性能有较大影响。改变聚醚二元醇的结构，可调控WP U纳米复合膜的微结构和性能。%UV⁃curable waterborne polyurethane(WPU)/silicon dioxide(SiO2) nanocomposites were prepared by three types of polyether ( PEO⁃PPO⁃PEO, PPG and PTMG) and acetone method. The effect of polyether on the particle size, microstructure and mechanical properties of the WPU nanocomposites films was studied. The SEM and DMA examinations of nanostructured films indicated that the microstructure and dynamic mechanical properties were strongly affected by the polyether soft segment. The microstructure and properties of WPU nanocomposites films were controlled with polyether struture changing.