Morphology of polystyrene/polystyrene-block-poly(methyl methacrylate)/poly(methyl methacrylate) composite particles
Morphology of polystyrene/polystyrene-block-poly(methyl methacrylate)/poly(methyl methacrylate) composite particles
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DOI：
10.1016/j.polymer.2004.11.057
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发表时间：
2005-02
期刊：
影响因子：
4.6
通讯作者：
M. Okubo;Naohiko Saito;R. Takekoh;Hiroshi Kobayashi
中科院分区：
文献类型：
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作者：
M. Okubo;Naohiko Saito;R. Takekoh;Hiroshi Kobayashi
以十二烷基硫酸钠（SDS）为分散液，通过释放甲苯的方法制备了聚苯乙烯/聚苯乙烯嵌段聚甲基丙烯酸甲酯/聚甲基丙烯酸甲酯（PS/PS-b-PMMA/PMMA）复合粒子。复合粒子的形态受甲苯的释放速率、PS-b-PMMA的分子量、液滴尺寸和聚合物组成的影响。用甲苯液滴制备了PS-b-PMMA和PS/PS-b-PMMA/PMMA的“洋葱状”多层复合粒子，其中PS和PMMA的质量相同。后者的多层复合颗粒的层厚度随着均聚物的量的增加而增加。PS-b-PMMA/PS复合粒子具有海岛结构，其中PMMA微区分散在PS基体中。另一方面，PS-b-PMMA/PMMA复合粒子具有由PMMA基体和PS微区组成的圆柱状结构。
Polystyrene/polystyrene-block-poly(methyl methacrylate)/poly(methyl methacrylate) (PS/PS-b-PMMA/PMMA) composite particles were prepared by releasing toluene from PS/PS-b-PMMA/PMMA/toluene droplets dispersed in a sodium dodecyl sulfate aqueous solution. The morphology of the composite particles was affected by release rate of toluene, the molecular weight of PS-b-PMMA, droplet size, and polymer composition. ‘Onion-like’ multilayered composite particles were prepared from toluene droplets of PS-b-PMMA and of PS/PS-b-PMMA/PMMA, in which the weights of PS and PMMA were the same. The layer thicknesses of the latter multilayered composite particles increased with an increase in the amount of the homopolymers. PS-b-PMMA/PS composite particles had a sea-islands structure, in which PMMA domains were dispersed in a PS matrix. On the other hand, PS-b-PMMA/PMMA composite particles had a cylinder-like structure consisting of a PMMA matrix and PS domains.