Heterogeneous Structure in Blends of Rubber Polymers
Heterogeneous Structure in Blends of Rubber Polymers
复制标题
橡胶聚合物共混物中的非均相结构
DOI：
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发表时间：
1965
期刊：
影响因子：
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通讯作者：
D. N. Keyte
中科院分区：
文献类型：
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作者：
M. H. Walters;D. N. Keyte
摘要用相差显微镜对橡胶聚合物共混物进行了研究。从未观察到分子尺度上的混合，更均匀的共混物由一对互锁的“网络”组成，其网眼直径约为1微米。当聚合物的粘度相差很大时，混合就不那么完美了，在最坏的情况下，混合物由较硬的聚合物块嵌入较软的聚合物中组成。通过干燥混合溶液制备的共混物总是非常不均匀的。胶料的物理性质没有受到很大的影响，这种异质性的大小，虽然有证据表明，从电子显微镜表面复制品破裂表面往往遵循的聚合物之间的界面。采用多种技术研究了填料、氧化锌和蛋白质在共混物中的分布。结果发现，这些材料（可能还有许多其他复合成分）并不总是均匀分布在聚合物之间，这可能是预期的。
Abstract The phase contrast microscope has been used to examine blends of rubber polymers. Mixing on a molecular scale was never observed, the more homogeneous blends consisting of a pair of interlocking “networks” with a mesh diameter of about a micron. Blending was less perfect when the polymers were of widely different viscosities, and in the worst cases consisted of lumps of the stiffer polymer embedded in the softer polymer. Blends prepared by drying mixed solutions were always exceedingly heterogeneous. Physical properties of gum stocks were not greatly affected by the size of this heterogeneity, although there was evidence from electron microscope surface replicas that rupture surfaces tend to follow the interface between the polymers. The distribution of filler, zinc oxide and protein in blends was studied using a variety of techniques. It was found that these materials (and probably many other compounding ingredients) are not always evenly distributed between the polymers, and this may be expecte...