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采用新的过渡金属钯σ 键合炔酯单体络合物 [Pd(C≡CCH2 OOCCH3 ) 2 (PPh3 ) 2 ](PPA) ]作为催化剂 ,合成了主链含π 共轭结构、可溶的醋酸丙炔酯低聚物 (OPAT) ,其重均分子量为 4 50 0 ,聚合度约为 4 5.研究了这一新聚合反应的特征、动力学行为和产物的湿敏特性 .聚合反应的表观速率方程为 :Rp=kp[PAT]1.5[PPA]1.5,其中表观速率常数kp=6 58× 1 0 -4 L2 mol-2 s-1,表观活化能为 1 1 0 2kJ/mol.低聚物经无水三氯化铁掺杂后 ,在几乎全部湿度范围内 (RH % :1 1 %～ 96% )显示良好湿敏响应 .
A novel transition metal palladium σ-bonded acetylene ester monomer complex [Pd (C≡CCH2 OOCCH3) 2 (PPh3) 2] (PPA) was used as a catalyst to synthesize a The propynyl acetate oligomer (OPAT) has a weight average molecular weight of 4 50 0 and a degree of polymerization of about 4. The characteristics, kinetic behavior and moisture-sensitive properties of this new polymerization reaction were investigated. The apparent rate equation is: Rp = kp [PAT] 1.5 [PPA] 1.5, in which the apparent rate constant kp = 6 58 × 1 0 -4 L2 mol-2 s-1 and the apparent activation energy is 1 1 0 2 kJ / mol. The oligomers showed good hygroscopic response in almost the entire humidity range (1% ~ 96% RH) after doping with FeCl3.