文献类型：专利

英文题名：Method for solid phase grafting of maleic anhydride and polypropylene in supercritical CO2 environment

作者：LIU T;ZHAO L;CHEN M

机构：[1]UNIV EAST CHINA SCI & TECHNOLOGY

申请号：CN1605596-A

申请日：2004-09-07

公开日：2005-04-13

语种：英文

收录：DERWENT

摘要：NOVELTY - The present invention discloses the process of solid phase grafting maleic anhydride onto polypropylene in supercritical CO2 environment. The grafting process includes the following steps: setting polypropylene, maleic anhydride and initiator in supercritical CO2 to swell and penetrate polypropylene; and subsequent reaction in supercritical CO2 for 1-5 hr to obtain the grafted product. The grafted product has grafting rate up to 0.5 %, reaching the grafting level of melting grafting, and no serious molecular weight degradation. ADVANTAGE - The process of the present invention is simple and has no solvent recovering, no environmental pollution, homogeneous grafting and less degradation of the grafted product.