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Effects of thermal treatment on the CO 2 sorption of triblockcopolymers derived from polyimide and poly(methylmethacrylate)
Author(s) -
Ando Shota,
Yoshida Akihiro,
Nagai Kazukiyo
Publication year - 2015
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.42208
Subject(s) - sorption , materials science , polyimide , copolymer , polymer chemistry , thermal decomposition , phase (matter) , methyl methacrylate , chemical engineering , poly(methyl methacrylate) , polymer , solubility , composite material , chemistry , adsorption , organic chemistry , layer (electronics) , engineering
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 CO 2 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 CO 2 sorption decreased with increased PMMA content rate. Infinite‐dilution CO 2 solubility depended on the Langmuir's site of each polymer because S H0 /S 0 of PI and Block(PI/PMMA) varied from 0.84 to 0.92 CO 2 affinity was increased by thermal treatment as indicated by the higher b and S 0 values of thermally treated films than those of nontreated films. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015 , 132 , 42208.