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首页> 外文期刊>Journal of Applied Polymer Science >Pore Memory of Macroporous Styrene-Divinylbenzene Copolymers
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Pore Memory of Macroporous Styrene-Divinylbenzene Copolymers

机译：大孔苯乙烯-二乙烯基苯共聚物的孔记忆

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摘要

The variation of the pore structure of styrene-divinylbenzene (S-DVB) copolymer beads with the drying conditions was investigated. Macroporous S-DVB copolymer beads with various DVB contents were prepared in the presence of toluene-cyclohexanol mixtures as a diluent. It was found that the pores of 10~1-nm radius, corresponding to the interstices between the microspheres, collapse upon drying of the copolymers from toluene. The collapsed pores reexpand if the copolymers were dried from methanol. The collapse-reexpansion process of the pores was found to be reversible, indicating that the actual pore structure formed during the crosslinking copoly-merization is memorized by the copolymer network. The magnitude of the pore structure variation increased on worsening the polymer-diluent interactions during the gel formation process due to the simultaneous increase in crosslink density distribution.
机译：研究了苯乙烯-二乙烯基苯（S-DVB）共聚物微珠的孔结构随干燥条件的变化。在甲苯-环己醇混合物作为稀释剂的情况下，制备了具有各种DVB含量的大孔S-DVB共聚物珠。结果发现，当共聚物从甲苯中干燥时，对应于微球之间的间隙的半径为10-1nm的孔塌陷。如果将共聚物从甲醇中干燥，则塌陷的孔会重新膨胀。发现孔的塌陷-膨胀过程是可逆的，这表明在交联共聚期间形成的实际孔结构是通过共聚物网络记忆的。由于交联密度分布的同时增加，在凝胶形成过程中，随着聚合物-稀释剂相互作用的加剧，孔结构变化的幅度增加。

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