四氟乙烯与异丙醇的调节聚合研究

采用气相色谱法,研究了反应温度、引发剂浓度、四氟乙烯单体压力对四氟乙烯与异丙醇调聚反应产物重量分布的影响。实验结果表明,随温度升高,n=1的产物含量增加,n>1的各产物含量下降;单体压力的影响则相反;引发剂浓度的影响不明显。反应初期n=1产物生成速率较快,反应中、后期有利于m≥3产物的生成。

STUDY ON TELOMERIZATION OF TETRAFLUOROETHYLENE WITH ISOPROPANOL

Using gas chromatography method, the effects of the reaction temperature, the concentration of initiator and the pressure of monomer (TFE) on the weight distribution of products in telomerization of TFE with i-C3H7OH have been investigated. Experimental data show that the percentage of product(H-(CF2CF2)nC(CH3)2-OH)with n = 1 increases, and the percentage of all products with n>1 decrease with increase in temperature, while the effect of monomer pressure is quite opposite to that of temperature. The weight distribution of products are affected very slightly by the concentration of initiator. The rate of formation of products with n = 1 are fast at the beginning of the reaction, but in the middle and later stage those with n≥3 are more favourable.