离子液体对PMMA绿色增塑性能

Ionic Liquid as A Green Plasticizer for PMMA

合成了离子液体[bm im]PF6,通过其与MMA的在位聚合用作PMMA的增塑剂,用DSC和TG等方法测定了增塑前后聚合物的玻璃化转变温度和热稳定性。结果表明,当离子液体[bm im]PF6的体积分数从0增至到60%时,聚合物的玻璃化转变温度(Tg)由105℃降至室温(20℃)以下,且几乎呈线性下降趋势,相应的热质量损失从4.19%降至0.16%,说明离子液体能够显著地降低PMMA的Tg,提高塑料的热稳定性能。

Ionic liquid [ bmim] PF6 （1-butyl-3-methylimidazolium hexafluorophosphate） was synthesized and characterized. It was used as a plasticizer for poly（ methyl methacrylate） by means of in situ radical polymerization. The glass transition temperature and the thermal stability of the PMMA samples were determined by virtue of DSC and TG. The glass transition temperature of the polymers displayed an almost linear decrease from 105℃ to below room temperature（20℃） with the increase of the ionic liquid content from 0 to 60% （ volume fraction） , and the corresponding mass loss of PMMA decreased from 4. 19% to 0. 16%. All of these indicated that the [ bmim] PF6 as a plasticizer was able to reduce the glass transition temperature of PMMA and improved its thermal stability remarkably.