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- W2027424503 abstract "A bis(ether anhydride) monomer, 1,1-bis[4-(3,4-dicarboxyphenoxy)phenyl]cyclohexane dianhydride (IV-A), was synthesized from the nitro displacement of 4-nitrophthalodinitrile by the phenoxide ion of 1,1-bis(4-hydroxyphenyl)cyclohexane (I-A), followed by alkaline hydrolysis of the intermediate bis(ether dinitrile) and dehydration of the resulting bis(ether acid). A novel series of organosoluble poly(ether imide)s (VIa–i)(PEIs) bearing cyclohexylidene cardo groups was prepared from the bis(ether anhydride) IV-A with various aromatic diamines Va–i via a conventional two-stage process. The PEIs had inherent viscosities in the range of 0.48–1.02 dL/g and afforded flexible and tough films by solution-casting because of their good solubilities in organic solvents. Most PEIs showed yield points in the range of 89–102 MPa at stress-strain curves and had tensile strengths of 78–103 MPa, elongations at breaks of 8–62%, and initial moduli of 1.8–2.2 GPa. The glass-transition temperatures (Tg's) of these PEIs were recorded between 200–234 °C. Decomposition temperatures of 10% weight loss all occurred above 490 °C in both air and nitrogen atmospheres, and their residues were more than 43% at 800 °C in nitrogen atmosphere. The cyclohexane cardo-based PEIs exhibited relatively higher Tg's, better solubilities in organic solvents, and better tensile properties as compared with the corresponding Ultem® PEI system. © 2001 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 39: 788–799, 2001" @default.
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- W2027424503 date "2001-01-01" @default.
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- W2027424503 title "Syntheses and properties of organosoluble poly(ether imide)s from 1,1-bis[4-(3,4-dicarboxyphenoxy)phenyl]cyclohexane dianhydride and aromatic diamines" @default.
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- W2027424503 doi "https://doi.org/10.1002/1099-0518(20010315)39:6<788::aid-pola1052>3.0.co;2-0" @default.
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