【摘要】 利用磨盘型力化学反应器制备聚氨酯弹性体/无机物超细复合粉体,复合粉体中聚氨酯弹性体(TPU)以厚度为200nm左右的片状结构存在;研究了不同形态无机物制备的超细复合粉体对聚甲醛冲击性能的影响,结果表明,球状碳酸钙与聚氨酯弹性体则成为聚氨酯弹性体包覆无机粒子的核壳式粒子分散于聚甲醛基体中,这种核壳式结构单元与聚甲醛有良好的相容性,有利于聚甲醛冲击性能的提高;TPU/CaCO3超细复合粉体含量为10%时,材料缺口冲击强度可以提高2.3倍,超细粉体填充体系力学性能明显优于常规共混物。更多还原

【Abstract】 TPU/inorganic filler ultrafine composite powders was prepared by PAN-milling, in which TPU was existed for flats with a thickness of about 200 nm. The effect of ultrafine composite powder prepared by different inorganic fillers on notched impact strength of POM was studied. The results show that TPU/ calcium carbonate composite powder is the best for toughing POM. This is because in the blend TPU and calcium carbonate are shaped core-shell structure, which has good compatibility with POM. When the content of TPU/ calcium carbonate composite powder is 10%, the notched impact strength of POM can touch peak, (15.3) kJ/m~2.更多还原