马来酸酐及其酯接枝mPE增容PA 6/mPE共混物的制备

摘要

The author prepared maleic anhydride grafted metallocene polyethylene (Mpe) (Mpe-g-MAH) and dibutyl maleate grafted Mpe (Mpe-g-DBM) via aqueous suspension grafting. The grafted products were taken as compatibilizers of polyamide (PA) 6/Mpe and were applied to the preparation of ternary blends, such as polyamide(PA) 6/Mpe/Mpe-g-M A H or PA 6/Mpe/Mpe-g-DBM. The compatibility between PA 6 and Mpe in the ternary blends was greatly strengthened with increasing the amount of Mpe-g-MAH or Mpe-g-DBM, which led to a rise in y crystal and a reduction in a crystal of PA 6 in the blends. As a result, the toughness, especially the low temperature toughness of the ternary blends was improved. The compatibilizing and toughening efficiency of Mpe-g-DBM were inferior to those of Mpe-g-MAH in the ternary blends for the reason that the anhydride groups of the latter were easier to react with the amino or imino groups of PA 6 in comparison with the ester groups of the former, although Mpe-g-DBM had higher grafting ratio than Mpe-g-MAH did.%采用水相悬浮法制备了马来酸酐接枝茂金属聚乙烯(mPE-g-MAH)、马来酸二丁酯接枝茂金属聚乙烯(mPE-g-DBM),并以其为聚酰胺(PA)6/茂金属聚乙烯(mPE)共混物的增容剂,分别制备了PA 6/mPE/mPE-g-MAH,PA 6/mPE/mPE-g-DBM 三元共混物.随着mPE-g-MAH,mPE-g-DBM用量的增加,三元共混物中PA 6的γ晶型增多,α晶型减少,PA 6与rmPE的相容性加强,使三元共混物的韧性,特别是低温韧性提高.尽管mPE-g-DBM的接枝率比mPE-g-MAH高,但由于后者中的酸酐基团比前者的酯基更易与PA 6中的氨基、亚氨基反应,因此,mPE-g-DBM的增容、增韧效果不如mPE-g-MAH.