烷烃稳定性高，反应活性低，直接官能团化困难。
Paraffin has high stability, low reactivity, and it is difficult to give functional group to paraffin directly.
卤原子作为保护基，代替末端炔发生碳-氢官能团化反应。
Halogen atom could activate the triple bond and as the directing group, the triple bond occurs the electrophilic addition reaction.
要实现PP与其它极性聚合物的原位相容，必须首先对PP功能能团化改性。
In order to achieve the in-situ compatibilization of PP and other polymers, we must firstly achieve the functionalization modification of PP.
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