官能团化聚丙烯改性Mg(OH)_2/PP的流动性

Effect of Functionalized Polypropylene on Melt flow Index of Mg( OH)_2/Polypropylene Composites

制备了官能团化聚丙烯(FPP)和丙烯酸(AA)改性Mg(OH)2/PP材料,用熔融指数仪研究了改性Mg(OH)2/PP流动性的影响。结果表明随Mg(OH)2加入及其含量增加,PP的熔体流动指数(MFI)明显降低。外加FPP可提高Mg(OH)2/PP的MFI值,而且在高Mg(OH)2含量时尤其明显。在Mg(OH)2/PP材料中加入AA更能提高材料的MI值,其作用比外加FPP的更大,归结于PP和AA存在增塑与润滑作用。而同时加入AA和DCP,由于DCP对PP的降解作用,使原位形成FPP改性材料的MFI值提高更加明显。

Mg(OH)2/PP composites modified by the addition of functionalized polypropylene (FPP) or acrylic acid (AA) and the formation of insitu FPP were prepared.The melt flow index was investigated.The results indicated that the addition of Mg(O H)2 and the increase of Mg(OH)2 decreased the melt flow index of PP obviousl y.Addition of FPP increased the melt flow index of Mg(OH)2/PP composites.F or the Mg(OH)2/PP composites modified with AA,the increase in the melt flow in dex was more effective than that of FPP.It was attributed to the plasticization of FPP and AA.In the presence of DCP,the formation of insitu FPP more signific antly increased the melt flow index of Mg(OH)2/PP composites. 