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通过熔融接枝的方法制备了双峰聚乙烯接枝马来酸酐(bPE-g-MAH)作为PC/bPE共混材料的增容剂,提高了共混材料的冲击强度。共混材料的动态力学测试表明,与未增容的共混材料相比,含有相容剂bPE-g-MAH的共混材料的储能模量略低、损耗模量峰较小,并在170℃附近多出了1个tanδ峰。这个峰的产生可能是由于bPE-g-MAH使得PC/bPE界面相增加,或是由于bPE-g-MAH上的MAH基团与相界面上的PC之间可能存在某种反应作用。用扫描电镜(SEM)对共混材料液氮脆断面进行了观测,结果表明,bPE-g-MAH改善了PC和bPE的相容性。
Bimodal polyethylene grafted maleic anhydride (bPE-g-MAH) was prepared as a compatibilizer for PC / bPE blends by melt grafting, which improved the impact strength of the blends. The dynamic mechanical tests of the blends show that the blends containing the compatibilizer bPE-g-MAH have a slightly lower storage modulus and a lower loss modulus peak than the non-compatibilized blends, An extra tan δ peak is observed near 170 ° C. This peak may result from the increase of PC / bPE interface due to bPE-g-MAH or because of the possible reaction between the MAH group on bPE-g-MAH and the PC on the phase interface. The scanning electron microscopy (SEM) was used to observe the liquid nitrogen-nitrogen brittle fracture surface of the blends. The results showed that the bPE-g-MAH improved the compatibility of PC and bPE.