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本文研究了以甲苯为溶剂，ＡｌＣｌ３和ＢＦ３·ＯＥｔ２为引发剂，１，３－戊二烯（ＰＤ）与苯乙烯（Ｓｔ）的阳离子共聚合反应，并用红外光谱测定聚合物的微观结构。由共聚单体ＰＤ和Ｓｔ加入顺序的不同可生成无规共聚物Ｐ（ＰＤ－ｃｏ－Ｓｔ）和接枝共聚物Ｐ（ＰＤ－ｇ－Ｓｔ）和Ｐ（Ｓｔ－ｇ－ＰＤ）。无论是由ＡｌＣｌ３引发聚合反应，还是由ＢＦ３·ＯＥｔ２引发聚合反应，Ｓｔ上的碳阳离子的活性都高于ＰＤ上碳阳离子的活性。由ＡｌＣｌ３首先引发ＰＤ进行聚合反应，结束后再引入Ｓｔ时，聚合体系不能引发Ｓｔ聚合反应；相反ＡｌＣｌ３首先引发Ｓｔ聚合后的体系能继续引发ＰＤ的聚合反应。ＢＦ３·ＯＥｔ２无论先引发Ｓｔ或是ＰＤ，都能在聚合反应完成后接着引发另一单体而生成接枝共聚物Ｐ（ＰＤ－ｇ－Ｓｔ）和Ｐ（Ｓｔ－ｇ－ＰＤ）。二苯醚与烯丙基氯的加入，提高了碳阳离子的稳定性，增加了聚合物的分子量，但降低了碳阳离子的活性，使得聚合反应的产率降低，同时对Ｓｔ和ＰＤ碳阳离子的活性次序无明显影响
In this paper, the cationic copolymerization of 1,3-pentadiene (PD) with styrene (St) using toluene as solvent, AlCl3 and BF3 · OEt2 as initiator, and the microstructure of the polymer were investigated by infrared spectroscopy. The random copolymer P (PD-co-St) and the graft copolymers P (PD-g-St) and P (St-g-PD) can be generated by the sequential addition of comonomers PD and St. Whether the polymerization was initiated by AlCl3 or by BF3 · OEt2, the activity of carbocations on St was higher than the activity of carbocations on PD. When AlCl3 first initiates the polymerization reaction of PD, after the introduction of St, the polymerization system can not initiate St polymerization; on the contrary, AlCl3 first initiates the system of St polymerization to continue the polymerization of PD. BF3 · OEt2 The graft copolymers P (PD-g-St) and P (St-g-PD) can be generated by initiating another monomer after the completion of the polymerization, regardless of the initiation of St or PD. The addition of diphenyl ether and allyl chloride increased the stability of the carbocation, increased the molecular weight of the polymer, but decreased the activity of the carbocation, resulting in a decrease of the yield of the polymerization reaction. Meanwhile, No significant effect on the activity order