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；
This article analyses the use of the polypropylene fibers in nonwovens from the sides of the molecular chain structure and the properties of pp.
主要从聚丙烯纤维的分子链结构、性能特点方面分析了其在非织造布中的用途。
PP and many other polymers (RH) are attacked durIng processIng or outdoor use In the absence of stabilizers because of a chaIn degradation reaction.
聚丙烯及许多其它的聚合物(RH)若在缺少稳定剂的情况下进行加工或在户外使用，就会发生链式降解反应而遭受破坏。
The efficiency of surface migration of polyether chain segment was fully raised and hydrophilic modified on PP was implemented.
聚醚改性聚硅氧烷中的有机硅链段的良好靶向作用，充分提高了聚醚链段表面迁移的效率，实现对PP的亲水改性。
The efficiency of surface migration of polyether chain segment was fully raised and hydrophilic modified on PP was implemented.
聚醚改性聚硅氧烷中的有机硅链段的良好靶向作用，充分提高了聚醚链段表面迁移的效率，实现对PP的亲水改性。
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