分散聚合中溶剂回收利用的可行性  

The Feasibility of Repeated Use of Solvent in Dispersion Polymerization

作　　者：张凯[1,2] 黄渝鸿[3] 傅强[1,4] 江璐霞[1,4] 周德惠[3] 

机构地区：[1]四川大学高分子科学与工程学院,成都610065 [2]中国工程物理研究院结构力学研究所绵阳 [3]中国工程物理研究院结构力学研究所 [4]高分子材料工程国家重点实验室成都

出　　处：《应用化学》2003年第10期942-945,共4页Chinese Journal of Applied Chemistry

基　　金：中国工程物理研究院基金 (2 0 0 10 32 6 )资助项目

摘　　要：以无水乙醇为溶剂 ,偶氮二异丁腈 (AIBN)为引发剂 ,聚乙烯吡咯烷酮 (PVP)为分散稳定剂 ,用分散聚合工艺制备了微米级单分散聚苯乙烯微球。以该分散聚合体系为对象 ,研究了溶剂无水乙醇的回收利用。由回收的溶剂制备出粒径为 3 0 μm左右的单分散聚苯乙烯微球。分析溶剂中主要组分的含量及所制备的聚苯乙烯微球的形貌和粒径 ,发现随着溶剂回收利用次数的增加 ,聚苯乙烯微球的粒径略有增加 ,分散系数ε逐渐变大 (D1=3 0 2 μm ,ε1=0 0 2 ;D2 =3 17μm ,ε2 =0 0 3;D3 =3 2 5 μm ,ε3 =0 0 5 )。因此 ,用分散聚合反应制备粒径约为 3 0 μm的单分散 (ε≤ 0 0 5 )聚苯乙烯微球 ,溶剂可直接反复利用 3次 ;当聚苯乙烯微球的分散系数ε>0 0 5时 ,已不符合单分散性 ,溶剂须提纯后方可再使用。Monodisperse(dispersion coefficient ε≤0.05) polystyrene microspheres were prepared by dispersion polymerization in ethyl alcohol using polyvinylpyrrolidone(PVP) as a steric stabilizer and 2,2′-azo- bisizobutyronitrile as an initiator. Three batches of 3.0 μm monodisperse polystyrene microspheres were prepared with ethyl alcohol which has been used three times in recycling. The products were characterized by SEM and size analysis. The concentrations of reactants in three batches were examined by gas chromatography. The size of polystyrene microspheres and the dispersion coefficient were ε increased slightly with the times of solvent recycling(D 1=3.02 μm, ε 1=0.02; D 2=3.17 μm,ε 2=0.03; D 3=3.25 μm, ε 3=0.05). But if the dispersion coefficient ε of polystyrene microspheres is beyond 0.05, the ethyl alcohol used must be purified in second batch.

关 键 词：分散聚合 溶剂回收利用 微米级单分散聚苯乙烯微球 可行性 

分 类 号：O631[理学—高分子化学]