【摘要】 采用固相接枝法制备了ＤＢＭ－ｇ－ＰＥ，用红外光谱分析证明了接枝物确实存在。ＰＶＣ／ＣＰＥ＝１００／５合金性能测定结果表明，添加５份接枝物的合金（Ａ），缺口冲击强度、拉伸强度分别为１８．２ｋＪ／ｍ２和５３．０ＭＰａ；而添加５份ＰＥ的合金（Ｂ），其相应性能为５．１ｋＪ／ｍ２和３３．８ＭＰａ。不加接枝物的合金（Ｃ），虽有高韧性，但拉伸强度却由５３．０ＭＰａ降至５０．２ＭＰａ。ＤＳＣ、ＳＥＭ的结果均表明，ＰＥ接枝ＤＢＭ后与ＰＶＣ的相互作用增强，与ＣＰＥ协同作用能增韧、增强ＰＶＣ，并探讨了其机理。更多还原

【Abstract】 The graft copolymer of PE with dibutyl maleate (DBM), DBM g PE, has been prepared by solid graft. Existence of DBM g PE macromolecule was confirmed with IR spectrum. The results of mechanical properties, DSC and SEM show as follows: (1) The notched impact strength and tensile strength of alloy added 5 ph DBM g PE are higher 257% and 56.8% respectively than the alloy added 5 ph PE. (2) PVC T g of PVC/CPE/DBM g PE (100/5/5) alloy is 82 ℃, PVC T g of PVC/CPE/PE (100/5/5) alloy is 86 ℃. It is lower 4 ℃ than alloy added 5 ph PE. (3) The domain of dispersion phase is finer and evener than the alloy added 5 ph PE. Obviously, interaction of PVC and PE in PVC alloys was increase by DBM g PE graft copolyomer.更多还原