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专利曾报导六氟丙烯与四氟乙烯在95℃以上温度下进行的共聚反应。我们在研究这对单体在120℃的共聚反应中,发现六氟丙烯在高温下有水介生成α-氢四氟丙酸的现象。共聚反应在130升不锈钢高压釜中进行。加蒸馏水55升六氟丙烯的重要比为75％的两种单体混合物16公斤,过硫酸钾41克,聚合温度120℃,聚合压力35公斤/厘米~2。当聚合开始聚合压力下降时,补加六氟丙烯重量比为5％的两种单体混合物以维持聚合压力不变。
Patents have been reported hexafluoropropylene and tetrafluoroethylene at a temperature above 95 ℃ for the copolymerization. We studied in the copolymerization of this pair of monomers at 120 ° C and found that hexafluoropropylene is hydrosilylatable to α-hydrofluoropropionic acid at high temperatures. The copolymerization was carried out in a 130 liter stainless steel autoclave. Add distilled water 55 liters of hexafluoropropylene important ratio of 75% of two monomer mixture 16 kg, 41 g of potassium persulfate, the polymerization temperature of 120 ° C, the polymerization pressure of 35 kg / cm ~ 2. When the polymerization pressure was reduced at the beginning of polymerization, two monomer mixtures were added at a weight ratio of hexafluoropropylene of 5% to maintain the polymerization pressure constant.