本研究以熔融混合法製備耐衝擊聚丙烯/熱塑性聚氨酯共混物，並研究不同重量比例之熱塑性聚氨酯對於耐衝擊聚丙烯之共混型態、熔融行為、結晶行為與熱性質之影響。SEM結果顯示，隨著熱塑性聚氨酯的比例提升，耐衝擊聚丙烯/熱塑性聚氨酯的斷面型態越粗糙，且TPU顆粒尺寸越大。DSC結果顯示，熱塑性聚氨酯的添加對於耐衝擊聚丙烯之結晶溫度與熔融溫度無顯著影響，但其對於耐衝擊聚丙烯之結晶焓與熔融焓之變化隨著比例提升而有所下降。 TGA結果顯示，隨著熱塑性聚氨酯之添加比例提升，四組耐衝擊聚丙烯/熱塑性聚氨酯共混物在三階段之熱裂解溫度皆有所提升。
This study aimed to investigate the effect of various weight ratio of thermoplastic polyurethane (TPU) on the blending morphology, melting behavior, crystalline behavior, and thermal properties of impact-resistance polypropylene (PP). From the test results, SEM images shown that the morphology of PP/TPU blends become rougher and the particle size of TPU with an increasing addition of TPU. DSC results revealed that the addition of TPU would cause the decreasing crystalline and melting enthalpy of PP, while would not significantly influence the crystalline and melting temperature. TGA results indicated that the increasing addition of TPU led to higher thermal degradation temperatures of PP/TPU blends in every step.
