IR analysis shows that graft copolymerization takes place on the tertiary carbon atom of PP molecular chain.
红外光谱分析表明，甲基丙烯酸单体在聚丙烯大分子链的叔碳原子上发生接枝共聚。
PP will degrade due to heat during processing, resulting in chain scission of macromolecule, reduction in molecular weight and rise in MI.
聚丙烯在加工时受热将发生大分子断链降解，致使分子量减小，熔体指数上升。
The introduction of the vinyl monomer containing polar group into PP macromolecular chain could improve the flame retardance of PP obviously.
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；
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