二茂铁和α-羟基乙基二茂铁对MMA本体聚合的影响

Effect of Ferrocene and α-Hydroxy Ethyl Ferrocene on Methyl Methacrylate Polymerization

聚甲基丙烯酸甲酯(PMMA)一般由本体聚合或悬浮聚合制得。本体聚合具有生产工艺简单,投资少等优点,但本体聚合周期长,反应热排除困难而易产生自动加速效应导致爆聚,因此制约了本体法制备PMMA。研究微量二茂铁及其衍生物α-羟基乙基二茂铁对MMA本体聚合的影响,结果表明:微量二茂铁或α-羟基乙基二茂铁的加入,聚合时间与聚合温度显著降低,在室温下能实现快速聚合;80℃时,当二茂铁的添加量超过0.17%时,MMA无法爆聚,解决了本体法制备MMA的瓶颈,对工业化生产具有一定的指导意义。

The polymethyl methacrylate（PMMA） was generally from the bulk polymerization or suspension polymerization systems. Though the manufacture technique of bulk polymerization was simple and the investment was low, meanwhile the polymerization was time-consuming and the heat of reaction expeled very difficulty,which made the auto-acceleration action easy,even worse might cause explosive polymerization. It was discussed that the effect of ferrocene （Fe） and its derivative α-hydroxyl ethyl ferroeene on MMA bulk polymerization. The results showed that when Fc or α-hydroxyl ethyl ferroeene was selected as an additive, the time and temperature of polymerization obviously declined, and the polymerization of MMA could be realized in the room temperature. At 80 ℃ ,when the Fc dosage was more than 0. 17 % ,no explosive polymerization happened. These had a leading meaning to industrialization.