New aromatic polyamides and polyimides having an adamantane bulky group

Title
New aromatic polyamides and polyimides having an adamantane bulky group
Authors
이영무
Keywords
Gas separation; Adamantane; Aromatic polyamides; Aromatic polyimides
Issue Date
2015-07
Publisher
Elsevier
Citation
MATERIALS TODAY COMMUNICATIONS, v. 5, Page. 23-31
Abstract
This paper reports the synthesis and characterization of a new rigid diamine monomer, having a spiro carbon moiety and an adamantane bulky group in its structure; namely spiro-(adamantane-2,91(2',7'-diamino)-fluorene) (SADAF). After its synthesis, using a straightforward methodology, a novel family of aromatic polyimides (PIs) and polyamides (PAs) has been attained by reaction of SADAF with three aromatic dianhydrides and two diacid chlorides, respectively. Two of the polyimides were obtained through the formation of the corresponding polyamic acid and subsequent thermal cycloimidization, whereas the other one, the polyimide from SADAF and 2,2-bis(3,4-dicarboxyphenyl) hexafluoropropane dianhydride (6FDA), could be synthesized by chemical imidization from the polyamic precursor. Regarding polyamides, two new ones, made from SADAF and isophthaloyl chloride (IPC) and the diacid chloride of 2,2-bis(4-carboxyphenyl) hexafluoropropane (6FC) could be obtained. All the polymers showed high Tg, above 350 degrees C, and excellent thermal resistance, with onset degradation temperatures higher than 450 degrees C. Polymers formed by the combination of SADAF with 6FDA and 6FC were prepared as dense films with good mechanical properties and their permselectivity properties were measured. (C) 2015 Elsevier Ltd. All rights reserved.
URI
http://www.sciencedirect.com/science/article/pii/S2352492815300362http://hdl.handle.net/20.500.11754/26225
ISSN
2352-4928
DOI
http://dx.doi.org/10.1016/j.mtcomm.2015.10.001
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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