光引发剂D-1173关键中间体异丁酰苯的合成改进

2-羟基异丁酰苯(D-1173)是一种典型的自由基型光引发剂,被广泛应用于紫外光固化体系中,而异丁酰苯则是制备D-1173的关键中间体。以苯甲腈和2-氯丙烷为原料,通过Grignard反应合成了异丁酰苯,并对该反应工艺进行了优化。优化后的工艺条件如下:异丙基氯化镁的合成条件为2-氯丙烷与镁物质的量之比为1.0:1.1,四氢呋喃为溶剂,反应温度为40℃,反应时间为2 h,碘为引发剂;异丁酰苯的合成条件为苯甲腈与异丙基氯化镁物质的量之比为1.0:1.1,反应温度为0℃,反应时间为2 h,溴化亚铜为催化剂,用量为1%(摩尔分数,以苯甲腈计)。相比于Friedel-Crafts酰基化工艺,本工艺避免了三氯化铝的使用,减少三废排放,对环境友好,具有较好的工业应用价值。

Kinetic Treatment for Copolymerization of Styrene or Methyl Methacrylate with N-phenylmaleimide

Shirota's kinetic model and our kinetic model were used to treat the kinetic data of styrene (St) and N-phenylmaleimide (PMI) copolymerization in which charge-transfer complex (CTC) was formed. The results obtained by Shirota's kinetic model were disagreed with the experiments and the experimental phenomena could not be explained. The kinetic data of all feed fractions can be treated with our kinetic model, and the experimental phenomena can be explained from the propagation constants and reactivity ratios. Our kinetic model is also suitable for the kinetic data of methyl methacrylate (MMA) and PMI copolymerization in which CTC can not be formed.