Phase structure, rheology and electrical conductivity of co-continuous polystyrene/polymethylmethacrylate blends filled with carbon black
Phase structure, rheology and electrical conductivity of co-continuous polystyrene/polymethylmethacrylate blends filled with carbon black
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DOI：
10.1016/j.compscitech.2015.10.003
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发表时间：
2015-11
影响因子：
9.1
通讯作者：
Selina L. Scherzer;E. Pavlova;Julian D. Esper;Z. Starý
中科院分区：
文献类型：
--
作者：
Selina L. Scherzer;E. Pavlova;Julian D. Esper;Z. Starý
本文研究了炭黑浓度对PS/PMMA共混物静态退火过程中的流变性、电导率和形态发展的影响。在所研究的共混物中，炭黑优先定位于PS中。熔融共混后，用来衡量共混物形态细度的比界面长度随共混物中炭黑含量的增加而线性增加。然而，在炭黑体积分数超过3vol.%的体系中，观察到在热处理过程中显著抑制了结构粗化，其中填充结构导致了明显的流动限制。共混物经退火后流动行为的最终变化是形态粗化和颗粒结构形成竞争的结果，并与炭黑的浓度有关。
In this work the effect of carbon black concentration on the rheology, electrical conductivity and morphology development of PS/PMMA co-continuous blends during quiescent annealing is investigated. In the blends studied carbon black is preferentially localized in the PS. The specific interfacial length, which is taken as a measure of fineness of blends morphology, increases linearly with the carbon black content in the blends after melt mixing. However, significant suppression of the structure coarsening during annealing is observed in systems with more than 3 vol.% of carbon black, in which the filler structures induce pronounced flow restrictions. The final change in the flow behaviour of the blend induced by annealing is a result of competition between morphology coarsening and particle structure formation and it depends on the concentration of carbon black.