On the surface free energy of PVC/EVA polymer blends: Comparison of different calculation methods
On the surface free energy of PVC/EVA polymer blends: Comparison of different calculation methods
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DOI：
10.1006/jcis.1998.5814
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发表时间：
1998-12-01
影响因子：
9.9
通讯作者：
Saramago, BJV
中科院分区：
文献类型：
--
作者：
Michalski, MC;Hardy, J;Saramago, BJV
采用货车Oss处理（Lifshitz和电子给体-电子受体表面自由能分量）和Owens-Wendt处理（色散和非色散表面自由能分量）计算了聚氯乙烯（PVC）+聚（乙烯-醋酸乙烯酯共聚物）（伊娃）共混物聚合物膜的表面自由能。表面自由能的结果被发现是很大程度上依赖于计算方法和用于接触角测量的标准液体的数量。非色散/施主-受主表面自由能分量和聚合物膜的总表面自由能总是较高时，使用的货车Oss处理相比，欧文斯-Wendt处理。相反，这两种方法导致类似的非极性/Lifshitz组件。所有的计算方法都在很好的协议PVC的表面自由能，但是，出现的共混物中的伊娃含量增加的方法之间的差异。固体表面自由能的计算似乎还没有一个确定的解。为了在计算这一重要的物理化学量时取得一致性，需要进一步发展现有的模型。(C)北京：科学出版社.
The surface free energy of polymeric films of polyvinylchloride (PVC) + poly(ethylene-co-vinylacetate) (EVA) blends was calculated using the van Oss treatment (Lifshitz and electron donor-electron acceptor components of surface free energy) and the Owens-Wendt treatment (dispersive and nondispersive components of surface free energy). Surface free energy results were found to be greatly dependent on the calculation method and on the number of standard liquids used for contact angle measurements. The nondispersive/donor-acceptor surface free energy component and the total surface free energy of polymeric films were always higher when the van Oss treatment was used compared to the Owens-Wendt treatment. Conversely, both methods led to similar apolar/Lifshitz components. All the calculation methods were in good agreement for the surface free energy of PVC; however, a discrepancy between the methods arose as EVA content in the blends increased. It seems that there is not yet a definite solution for the calculation of solid surface free energy. Further developments of existing models are needed in order to gain consistency when calculating this important physicochemical quantity. (C) 1998 Academic Press.