mPE-g-MAH的制备及其改性聚烯烃复合材料性能研究

Preparation of mPE-g-MAH and Its Composites with Polyolefin

研究了马来酸酐接枝茂金属聚乙烯(mPE-g-MAH)的接枝工艺,并研究了其对聚烯烃复合材料性能的影响。结果表明,过氧化二异丙苯用量为0.2%(质量分数,下同)、马来酸酐用量为2%、抑制剂用量为0.2%时,制备出接枝率为1.37%、凝胶率为0.22%的mPE-g-MAH;mPE-g-MAH(接枝率为0.80%)比纯mPE的拉伸强度和断裂伸长率分别增加了20.8%和17.1%,极限氧指数从27.0%提高到28.6%;mPE-g-MAH的接枝率达到1.37%时,其改性聚烯烃复合材料的拉伸强度和断裂伸长率分别又提高了9.2%和15.0%,极限氧指数又提高到29.8%,平衡扭矩变化均不明显。

Technology of maleic anhidride （MAH） grafted onto roPE was studied. When the loading of DCP was 0. 2 wt %, maleic anhydride was 2 wt %, and inhibitor was 0. 2 wt %, all based on PE, the graft rate was 1.37 wt %,and the gel fraction was 0.22 %,. Compared with neat roPE, the tensile strength and elongation at break of mPE-g-MAH （graft rate 0. 80 wt %,） increased by 20. 8%, and 17. 1%,, respectively, and the oxygen index increased from 27.0 %, to 28. 6 %. When the grafting rate reached 1. 37 wt %,, the tensile strength and elongation at break were further increased by 9.2%, and 15.0 %,, respectively, and the oxygen index increased to 29.8%,.