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首页> 外文期刊>Journal of Applied Polymer Science >Microhardness of styrene/butadiene block copolymer systems: Influence of molecular architecture
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Microhardness of styrene/butadiene block copolymer systems: Influence of molecular architecture

机译：苯乙烯/丁二烯嵌段共聚物体系的显微硬度：分子结构的影响

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摘要

The influence of molecular architecture on the mechanical properties of styrene/butadiene block copolymers was investigated by means of the microhardness technique. It was found that the microhardness of the styrene/butadiene block copolymers is dictated by the nature of microphase separated morphology. In contrast to polymer blends and random copolymers, in which the microhardness generally follows the additivity rule, the behavior of the investigated block copolymers was found to significantly deviate depending on their molecular architecture. The glass-transition temperature of the polystyrene phase (Tg-PS), which practically remained constant and that of the polybutadiene phase (Tg-PB), which varied with the change in the block copolymer architecture, apparently do not influence the microhardness values of the block copolymers. (C) 2003 Wiley Periodicals, Inc. [References: 30]
机译：通过显微硬度技术研究了分子结构对苯乙烯/丁二烯嵌段共聚物力学性能的影响。发现苯乙烯/丁二烯嵌段共聚物的显微硬度由微相分离形态的性质决定。与聚合物共混物和无规共聚物不同，后者的显微硬度通常遵循可加性规则，发现所研究的嵌段共聚物的行为明显不同，具体取决于其分子结构。聚苯乙烯相（Tg-PS）的玻璃化温度实际上保持恒定，而聚丁二烯相（Tg-PB）的玻璃化温度随嵌段共聚物结构的变化而变化，显然不会影响其的显微硬度值。嵌段共聚物。 （C）2003 Wiley Periodicals，Inc. [参考：30]

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