接枝改性无卤阻燃聚丙烯的研究

采用接枝改性手段把含有极性基团的乙烯基单体引入非极性的PP大分子骨架，将PP功能化，再与非卤阻燃剂如含NH2基的P－N膨胀型阻燃剂等进行大分子反应，制备了非卤阻燃聚丙烯母粒。着重探讨了含极性基团的乙烯基单体种类及用量等因素对PP阻燃性的影响。在PP大分子链上接枝含极性基团的乙烯基单体，可显著提高PP的阻燃性能；在双单体接枝体系中，单体A与C的配比为10／30时，最高氧指数可达32．0。

Study of Halogen-free Flame Retardant PP by Grafting Modification

s Halogen free flame retardant PP matrix was prepared by introducing vinyl monomers,which containing polar groups,into PP macromolecular chain by grafting modification,and the reaction of the functional PP with halogen free flame retardant,such as P N intumescent flame retardant containing NH 2group was made. the effects of the type and content of vinyl monomer containing polar group on the flame retardance of PP were studied. The introduction of the vinyl monomer containing polar group into PP macromolecular chain could improve the flame retardance of PP obviously. In the two monomer grafted systems the maximum oxygen index would be 32.0 when the compounding ratio of monomer A and C was 10:30