【摘要】 研究了乳液聚合工艺对模塑级聚偏氟乙烯 (PVDF)树脂性能的影响。结果表明 :将乳化剂全氟辛酸和乳液稳定剂石蜡复合使用 ,可得到粒径分布窄、稳定性良好的PVDF乳液 ,聚合用石蜡可循环使用 ,聚合残留的偏氟乙烯 (VDF)单体经气液分离、干燥后可用于聚合反应 ;确定了在 10 0L卧式釜中乳液聚合制备模塑级PVDF的工艺条件为 :搅拌转速 60r/min、过硫酸铵用量 0. 0 3 5 %、链转移剂用量 0 . 6%、全氟辛酸用量 0. 13 %、石蜡用量 0 .2 % ,所制得的PVDF的性能可达到国外同类产品的水平。更多还原

【Abstract】 The effects of emulsion polymerization process on the property of compression molding polyvinylidene fluoride(PVDF) were studied The results showed that a stable PVDF emulsion with narrow distribution of particle diameter could be prepared by the synergistic action of perfluorooctanoate and paraffin wax The paraffin wax could be reused, and the recovered VDF through gas-liquid separation and drying could be used to the polymerization The technical conditions for the preparation of PVDF by a horizontal 100 L reactor were also determined, ie agitation speed 60 r/min, (NH4)2S2O8 initiator 035 wt‰, chain-transfer agent 60 wt‰, perfluorooctanoate 13 wt‰, paraffin wax 20 wt‰ The property of the prepared product came up to the level of the products of the same type abroad更多还原