Effects of thermal treatment on the CO2 sorption of triblockcopolymers derived from polyimide and poly(methylmethacrylate)
Effects of thermal treatment on the CO2 sorption of triblockcopolymers derived from polyimide and poly(methylmethacrylate)
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DOI：
10.1002/app.42208
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发表时间：
2015-07
影响因子：
3
通讯作者：
Shota Ando;A. Yoshida;K. Nagai
中科院分区：
文献类型：
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作者：
Shota Ando;A. Yoshida;K. Nagai
以4，4-（六氟异亚丙基）二邻苯二甲酸酐-2，3，5，6-四甲基-1，4-苯二胺（6FDA-TeMPD）和聚甲基丙烯酸甲酯（PMMA）为原料，合成了ABA型三嵌段共聚物。通过测定不同含量比例和PMMA块的热分解对CO2吸附性能的影响来表征膜。热重分析结果表明，热不稳定块可以完全分解下，以前报道的热条件。SEM结果表明，微凸体是由PMMA嵌段含量引起的微相分离。在Block（28/72）和Block（10/90）上检测到许多尺寸约为10 - 50 nm的孔。所有薄膜的吸附等温线均符合双模式吸附模型，且CO2吸附量随PMMA含量的增加而降低。无限稀释CO2的溶解度取决于每个聚合物的朗缪尔位点，因为PI和块（PI/PMMA）的SH0/S0从0.84变化到0.92 CO2的亲和力增加热处理所示的热处理膜的较高的B和S0值比未处理的膜。© 2015威利期刊公司. J.应用聚合物sci. 2015，132，42208。
ABA-type triblock copolymers were synthesized using 4,4-(hexafluoroisopropylidene) diphthalic anhydride-2,3,5,6-tetramethyl-1,4-phenylenediamine (6FDA-TeMPD) and poly(methyl methacrylate) (PMMA). The films were characterized by determining the effects of different content ratios and thermal decomposition of PMMA block on CO2 sorption properties. TGA results showed that a thermal labile block can be completely decomposed under a previously reported thermal condition. SEM results presented that the asperity was micro-phase separation caused by the PMMA block content rate. Numerous pores with sizes of approximately 10 to 50 nm were detected on Block(28/72) and Block(10/90). The isotherms of all films fitted the dual-mode sorption model, and CO2 sorption decreased with increased PMMA content rate. Infinite-dilution CO2 solubility depended on the Langmuir's site of each polymer because SH0/S0 of PI and Block(PI/PMMA) varied from 0.84 to 0.92 CO2 affinity was increased by thermal treatment as indicated by the higher b and S0 values of thermally treated films than those of nontreated films. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42208.