中国塑料2017，Vol.31Issue(8)：24-29,6.DOI:10.19491/j.issn.1001-9278.2017.08.004
改性硅分子筛在PLA中的扩链和阻燃性能研究
Study on Chain Extension and Flame Retardancy of Poly(lactic acid)with Modified Silica Molecular Sieves
摘要
Abstract
In this paper,mesoporous silica molecular sieve,SBA-15,was surface modified by reacting with a silicon coupling agent,and then its structure was characterized by Fouriertransform infrared spectroscopy,X-ray powder diffraction and scanning electron microscopy.The results indicated that the framework structure of molecular sieve was well maintained and the amino groups were grafted on the molecular sieve through covalent bonding.When 0.5 wt ％ of modified silica molecular sieve was added into poly(lactic acid) (PLA),the complex viscosity and storage modulus of PLA increased significantly.This suggests that the molecular sieve performed an effective chain extension for PLA.Moreover,the chain-extended PLA exhibits a decrease in cold crystallization temperature,indicating a better crystallization capability.Furthermore,its release rates of carbon oxygen and heat were also reduced as a result of the enhancement of flame retardancy.关键词
聚乳酸/反应阻燃/介孔硅分子筛/扩链/改性Key words
poly(lactic acid)/reactive flame retardant/mescporous silica molecular sieve/chain extension/modification分类
化学化工引用本文复制引用
孟鑫,陈伟杰,公维光,辛忠,蒋泽文,彭景,盛艳..改性硅分子筛在PLA中的扩链和阻燃性能研究[J].中国塑料,2017,31(8):24-29,6.基金项目
国家自然科学基金(21576086) （21576086）
