To enhance impact strength of polyketone (PK) without loss of stiffness, PK was blended with polycarbonate (PC) via melt mixing. Three types of polyamides (PAs) with varying structures, — polyamide 6 (PA6), polyamide 612 (PA612), polyamide 12 (PA12) — were employed as polymeric compatibilizers. To elucidate the effect of the structure of PAs on the compatibilization, morphology, mechanical properties, and fracture behavior of the blends were investigated. The addition of PA6 and PA612 reduced the size of dispersed particles by encapsulating the PC phase, while PA12 was found not to affect the morphology of the PK/PC blend. The change in particle size, glass transition temperature (T_g), and elongation at break exhibited that PA6 was the most effective compatibilizer for the PK/PC blends of this study. These results were interpreted with the change in interfacial tension between PK and PA due to the difference in polarity of the PAs. It was found that the impact strength was not highest in the blend with the smallest particle size. The observation of sub-surface damage zone also indicated that effective toughening by intensive crazing in polymer blends requires dispersed particles of optimum size.

为了提高聚酮（PK）的冲击强度而又不损失刚度，通过熔融混合将PK与聚碳酸酯（PC）混合。具有不同结构的三种类型的聚酰胺（PAs）-聚酰胺6（PA6），聚酰胺612（PA612），聚酰胺12（PA12）-被用作聚合物增容剂。为了阐明PA的结构对共混物的相容性，形态，机械性能和断裂行为的影响，对它们进行了研究。PA6和PA612的添加通过封装PC相来减小分散颗粒的尺寸，而发现PA12不会影响PK / PC共混物的形态。粒径变化，玻璃化转变温度（T _g）和断裂伸长率表明PA6是该研究PK / PC混合物最有效的增容剂。这些结果可以解释为由于PA极性不同而导致PK和PA之间的界面张力发生变化。发现在具有最小粒径的共混物中冲击强度不是最高的。对表面下破坏区域的观察还表明，通过在聚合物共混物中进行强烈的开裂来有效地增韧，需要分散成最佳尺寸的颗粒。