LDPE－g－MALa离聚物的合成及表征

Synthesis and Characterization of LEPE-g-MALa Ionomer

合成了低密度聚乙烯接枝马来酸镧（ＬＤＰＥ－ｇ－ＭＡＬａ）离聚物，并对该离聚物进行了确证．实验结果表明：在ＬＤＰＥ－ｇ－ＭＡＬａ的ＩＲ谱上于１６０５ｃｍ－１处出现了羧酸盐的Ｃ＝Ｏ伸缩振动峰，同时ＷＡＸＤ谱上新出现的２θ＝１６．７０°，１３．８０°两个强衍射峰，也证明确有离子微区的存在．ＤＳＣ研究说明该接技产物结晶度降低，结晶速率加快．ＴＧＡ图则说明离子化可以提高聚合物的稳定性．

The LDPE-g-MALa is synthesized by molten process and investigated by IR,DSC, WAXD. The iR spectrum of LDPE-g-MALa shoWs that the absorption of the C =O in COO- groups shifts from 1790 cmanl to 1605 cm-1. The rate of crystallization of the ionomer is more rapid than that of LDPE, but the degree of crystallization of the ionomer is decreased. The WAXD spectra show the existence of ionic microzone. Meanwhile, the stability of polymer is promoted by ionization.