节点文献
聚乳酸玻璃化转变行为的分子模拟
Molecular Dynamic Simulation on the Glass Transition Properties of PLA
【摘要】 采用等温等压(NPT)正则系综,用分子动力学方法研究了聚乳酸的玻璃化转变行为,获得了玻璃化转变温度。在230~440K范围内,通过模拟体系的密度、比体积及相关径向分布函数等参数,最终确定了聚乳酸的玻璃化温度,模拟计算的结果与实验值吻合。
【Abstract】 The glass transition temperature(Tg) of polylactic acid(PLA) is determined by isothermal-isobaric molecular dynamic simulation(NPT-MD).The software package discover in materials studio with the condensed-phase optimized molecular potential for atomistic simulation study(COMPASS) is used for the simulation.The state parameters of density(ρ),specific volume(Vspecific) and radial distribution function(rdf) are obtained by NPT-MD at the temperature range of 230~440K and the Tg values are determined.The results of molecular dynamic simulation(MDS) agree very well with experimental values.
【关键词】 分子动力学;
玻璃化转变;
聚乳酸;
径向分布函数;
【Key words】 molecular dynamic simulation; glass transition temperature; polylactic acid; radial distribution function;
【Key words】 molecular dynamic simulation; glass transition temperature; polylactic acid; radial distribution function;
【基金】 国家自然科学基金(20603030);鲁东大学创新团队基金(08-CXA001)
- 【文献出处】 材料导报 ,Materials Review , 编辑部邮箱 ,2009年S1期
- 【分类号】O631.2
- 【被引频次】10
- 【下载频次】453