耗散颗粒动力学模拟
混溶性
材料科学
介观物理学
分子动力学
聚合物混合物
溶解度参数
聚对苯二甲酸乙二醇酯
热力学
粒子(生态学)
聚乙烯
聚苯乙烯
聚合物
高分子化学
复合材料
计算化学
共聚物
化学
物理
海洋学
量子力学
地质学
作者
Yizheng Fu,Liqiong Liao,Luxia Yang,Yanhua Lan,Linyu Mei,Yaqing Liu,Shuangqi Hu
标识
DOI:10.1080/08927022.2012.738294
摘要
Abstract The miscibility of polyethylene terephthalate (PET)/polylactide (PLA) blends is studied through atomistic molecular dynamics (MD) and mesoscale dissipative particle dynamics (DPD) simulation. Five PET/PLA blends (with the weight ratio at 90/10, 70/30, 50/50, 30/70 and 10/90) as well as pure PET and PLA are examined. The solubility parameter values obtained by using the MD simulation are in good agreement with the reference data. The Flory–Huggins parameters, χ, which are computed for different blends and determined from the cohesive energy densities, with the radial distribution functions g(r) of the inter-molecular atoms, suggest that PET is completely miscible with PLA over the entire composition range. This is further proved by the mesoscopic morphologies of PET/PLA blends. All the simulation results are qualitatively consistent with the experimental results, and demonstrate that the modelling strategies in this study may serve as a powerful tool for predicting miscibility and mesoscopic morphology of polymer blends. Keywords: blendmiscibilitymolecular simulationPETPLA Acknowledgements The authors are very grateful for the financial support from the National “973” Project, Shanxi Province Science Foundation for Youths, China (Grant No. 2010021023-5), and excellent Innovation Programme for graduate students of Shanxi Province and Youth Science Foundation of North University of China.
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