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本文提出于AlCl_3存在下α-蒎烯之阳离子聚合反应为异构聚合反应,聚合物链端为开环异构式(Ⅰ)或扩环异构式(Ⅱ)、(Ⅰ)有利于链增长、(Ⅱ)则倾向于链终止。实验证实低温下可得到高软化点树脂、而随着反应温度升高聚合度下降、二聚体增多。
In this paper, it is proposed that the cationic polymerization of α-pinene in the presence of AlCl 3 is a heterogeneous polymerization reaction. The end of the polymer is ring opened isomer (I) or ring extended isomer (II). (I) , (Ⅱ) tend to chain termination. Experiments confirmed that high temperature softening point resin can be obtained, and as the reaction temperature increases the degree of polymerization decreased dimer increased.