Cationic copolymerizations of different ketoketenes are conducted to explore the structure and properties of the afforded copolymers. Diethylketene (DEK) and diphenylketene (DPK) are both copolymerized with dimethylketene (DMK), via a cationic mechanism using the mixture AlCl₃ / (CH₃)₃CCl as initiator. The experiments confirmed that two series of polyketones, containing a main DMK chain comprising few DEK or DPK units, are successfully obtained. The reactivity ratios are calculated. The structures and thermal performances of the obtained copolymers are discussed. An interesting DMK / DEK copolymer with a broad processing window was obtained (T_m = 164 °C, \({T}_{d}^{5\%}\) = 259 °C).

进行不同酮基的阳离子共聚反应以研究所提供共聚物的结构和性能。使用AlCl ₃ /（CH ₃）₃ CCl混合物作为引发剂，通过阳离子机理将二乙基乙烯酮（DEK）和二苯基乙烯酮（DPK）与二​​甲基乙烯酮（DMK）共聚。实验证实，成功获得了两个包含主DMK链的聚酮系列，该主DMK链包含很少的DEK或DPK单元。计算反应率。讨论了所得共聚物的结构和热性能。获得了具有宽加工窗口的有趣的DMK / DEK共聚物（T _m  = 164°C，\（{T} _ {d} ^ {5 \％} \] = 259°C）。