Thesubstitution of bromine atoms is on the tertiarycarbon of main-chain of the polymersprimally.
反应以自由基机理进行，溴取代主要发生在主链上的叔氢原子上。
2
IR analysis shows that graft copolymerization takes place on the tertiarycarbon 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。
3
Antioxidants: Polymers such as polypropylene (PP) are not usable outdoors without appropriate stabilizers, because of the presence of readily removable hydrogen atoms on the tertiarycarbon atoms.