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1.研究了丙烯酸第三丁酯在氢化钠、四氢锂铝和四氢硼钠等碱金属氢化物及其络合物引发下,在不同溶剂中和不同温度下的负离子聚合反应。 2.以氢化钠和四氢锂铝为引发剂,在己烷和甲苯溶剂中得到结晶性全同构型聚合物;在四氢呋喃中得到非晶态聚合物。 3.四氢硼钠在己烷和甲苯溶剂中,不易引发丙烯酸第三丁酯的聚合反应,但在吡啶和四氢呋喃中能引发聚合,亦得到非晶态聚合物。 4.丙烯酸第三丁酯以碱金属氢化物及其络合物引发的聚合反应,可能主要是按负氢离子转移至单体的β-碳原子的机构进行的。
1. Anionic polymerization of tert-butyl acrylate in different solvents and at different temperatures was investigated in the presence of alkali metal hydrides such as sodium hydride, lithium aluminum tetrahydrate and sodium tetraborohydride and their complexes. 2. With sodium hydride and lithium aluminum hydride as initiator in hexane and toluene solvent to obtain a crystalline isotactic polymer; obtained in tetrahydrofuran amorphous polymer. 3. Sodium borohydride in hexane and toluene solvent, not easy to trigger the polymerization of tert-butyl acrylate, but in pyridine and tetrahydrofuran can initiate polymerization, also get amorphous polymer. 4. Polymerization of tributyl acrylate with an alkali metal hydride and its complex may predominately occur as a mechanism for the negative hydrogen ion transfer to the β-carbon atom of the monomer.