Effect of Interfacial Tension on the Formation of the Gradient Morphology in Polymer Blends.
Effect of Interfacial Tension on the Formation of the Gradient Morphology in Polymer Blends.
复制标题
界面张力对聚合物共混物梯度形态形成的影响。
DOI：
10.1006/jcis.1998.5674
复制
发表时间：
1998
影响因子：
9.9
通讯作者：
Tanioka
中科院分区：
文献类型：
--
作者：
Xie;Xiao;Zhang;Tanioka
为了研究界面张力对聚合物共混物中梯度相形态形成的影响，本研究通过皂化反应制备了几种不同羟基含量的EVA。将不同羟基含量、不同极性的EVA与PP共混，得到一系列不同界面张力的PP/EVA共混物。通过调节EVA的皂化程度，可以使不同界面张力的PP/EVA共混物在共混过程中得到相同的初始液滴尺寸。结果表明，所有PP/EVA共混物与PP/EVAC共混物一样，在样品的垂直截面上都形成了梯度形态。使用计算机图像分析仪，测定了每种混合物中分散液滴尺寸和EVAC组分的垂直分布。结果表明，随着共混物界面张力的增大，样品表面附近的EVA液滴尺寸和EVA组分增大，即PP/EVA界面张力越大，共混物中的梯度越大。版权所有1998年学术出版社。
In order to investigate the effect of interfacial tension on the formation of gradient phase morphology in polymer blends, a saponification reaction was carried out in this study to obtain several kinds of EVA with different contents of -OH groups. These EVAs with different -OH contents, namely with different polarities, were then blended with PP, and thus a series of PP/EVA blends with different interfacial tensions was obtained. The same initial droplet size could be obtained for PP/EVA blends with different interfacial tensions during compounding through adjusting the degree of saponification of EVA. It was found that all these PP/EVA blends could form a gradient morphology in the vertical section of the samples as PP/EVAc blends. Using a computer image analyzer, the vertical distributions of the dispersed droplet size and the EVAc component in each blend were determined. The results showed that the EVA droplet size and the EVA component increased in the vicinity of the sample surface with increasing interfacial tension of the blends; i.e., the greater the interfacial tension between PP and EVA, the larger the gradient tendency in the blend. Copyright 1998 Academic Press.