Surface enrichment in PS/PVME blends: 2. The effect of specific interactions in the bulk mixture
Surface enrichment in PS/PVME blends: 2. The effect of specific interactions in the bulk mixture
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PS/PVME 共混物中的表面富集：2. 本体混合物中特定相互作用的影响
DOI：
10.1016/0032-3861(93)90678-4
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发表时间：
1993
期刊：
影响因子：
4.6
通讯作者：
I. McEwen
中科院分区：
文献类型：
--
作者：
J. Cowie;B. Devlin;I. McEwen
苯乙烯共聚物的共混物的表面组成，含有氢键的共聚单体，与聚（乙烯基甲基醚）已估计使用红外反射光谱。表面富集的聚醚，它具有较低的表面能，是显着小于先前观察到的聚（乙烯基甲基醚）/聚苯乙烯均聚物共混物。这种影响的程度取决于所涉及的氢键的强度，并且这又可以与共混物可混性的程度相关，所述共混物可混性的程度由较低的临界相分离温度和混合热确定。研究结果证实，表面富集不仅取决于表面能的差异，但也对散装混合热力学。
The surface composition of blends of styrene copolymers, containing a hydrogen-bonding comonomer, with poly(vinyl methyl ether) has been estimated using infra-red reflectance spectroscopy. Surface enrichment by the polyether, which has the lower surface energy, is markedly less than that observed previously for poly(vinyl methyl ether)/polystyrene homopolymer blends. The extent of this effect depends on the strength of the hydrogen bond involved, and this in turn can be correlated with the degree of blend miscibility as determined by lower critical phase separation temperatures and heats of mixing. The findings confirm that surface enrichment depends not simply on surface energy differences but also on bulk mixing thermodynamics.