聚乙烯醇
乙烯醇
聚合物混合物
分子动力学
材料科学
聚合物
马来酸酐
高分子化学
质量分数
弗洛里-哈金斯解理论
乙醚
化学工程
化学
有机化学
复合材料
共聚物
计算化学
工程类
作者
Sean Moolman,M. Meunier,Philip Labuschagne,P.-A. Truter
出处
期刊:Polymer
[Elsevier]
日期:2005-06-17
卷期号:46 (16): 6192-6200
被引量:33
标识
DOI:10.1016/j.polymer.2005.03.121
摘要
The CSIR has developed a novel oxygen barrier technology for plastics packaging based on interpolymer complex formation between PVOH (polyvinyl alcohol) and PMVE-MA (poly(methyl vinyl ether-co-maleic acid)). As interpolymer complexation interactions are strongly dependent on stoichiometric ratios, the estimation of the optimum blend ratio is an important component of blend design. This study used molecular dynamics modelling to predict the ratio of optimum interaction for PVOH:PMVE-MA blends. Amorphous cells were constructed containing blends of short-chain repeat units of PVOH and PMVE-MA. The oligomers were equilibrated using both NVT and NPT dynamics and the cohesive energy densities (CED's) of the models were computed. From the CED's, energies of mixing and Flory–Huggins Chi Parameter (χ) values were estimated. The χ-values were negative for all blends, indicating favorable interaction between the two polymers. The minimum χ-values were found around 0.6–0.7 mass fraction of PMVE-MA, which agrees well with experimental viscosity results (this work), which indicated optimum interaction around 0.7 mass fraction PMVE-MA. These results confirm that molecular dynamics can be used as a tool for investigating interpolymer complexation phenomena.
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