POE接枝衣康酸增容PA6/POE共混物性能及形态研究

以衣康酸（ITA）为接枝单体，采用双螺杆挤出机和熔融接枝技术制备了一系列乙烯-辛烯共聚物接枝物（POE-g-ITA），通过红外光谱对接枝物的结构进行了表征，研究了引发剂和单体用量对POE-g-ITA接枝率和熔体流动速率的影响，当POE/ITA/过氧化二异丙苯（DCP）=94/6/0.36时，接枝率达到1.36 %；通过双螺杆挤出机将相容剂POE-g-ITA引入到聚酰胺6/乙烯-辛烯共聚物（PA6/POE）共混物中，研究了共混物的力学性能和形态结构。结果表明，加入5份（质量份数，下同）POE-g-ITA后，PA 6/POE共混物的冲击强度提高到纯PA 6的12.78倍，PA6与POE两相界面变得模糊，分散相尺寸明显减小，界面相互作用明显增强，相容性得到显著提高。

Study on Properties and Morphology of PA6/POE Blends Compatibized by POE Grafted Itaconic Acid

In this paper, a series of ethylene-octene copolymer graft (POE-g-ITA) was prepared via melt grafting technique using a twin screw extruder. The grafted product was characterized uisng FT-IR，and the effect of the loading of itaconic acid initiator on the graft ratio and melt flow rate of POE-g-ITA were studied. The graft ratio of POE-g-ITA reached 1.36% when POE/ITA/DCP is 94/6/0.36. The obtained POE-g-ITA was introduced into PA6/POE blends through twin screw extruder. The mechanical properties and morphological structure of the blends were investigated. The impact strength of the PA6/POE blend containing 5 phr POE-g-ITA was 12.78 times higher than neat PA 6. The interface between PA 6 and POE phases became indistinct and the dispersion phase size significantly reduced, the interface interaction was markedly enhanced and the compatibility was significantly increased.