Synthesis and Characterization of Poly(Aryl Ether Quinoxaline)s with Controlled Molecular Weight

Abstract:

Novel poly(aryl ether quinoxaline)s (PEQs) were prepared via a two-step procedure. First, poly (ether benzil) (PEB) was synthesized by the polycondensation of 4,4’-difluorobenzil and 4,4’-isopropylidenediphenol.Then, PEB was reacted with 1,2-diaminobenzene and 4,4'-oxydibenzene-1,2-diamine to give the PEQs. The molecular weight of the PEQs could be adjusted easily by varying the molar ratio of 1,2-diaminobenzene to 4,4'-oxydibenzene-1,2-diamine. The PEQs exhibited good solubility in common organic solvents such as NMP, DMAc, DMF, cyclohexanone and chloroform. In addition, the PEQs also had high glass transition (T_g) temperatures and good thermal properties, with an initial thermal decomposition temperature above 475 oC and glass transition temperatures above 210 oC. They also exhibited excellent resistance to strong acid and alkali.

• Periodical: Advanced Materials Research (Volumes 391-392)
• Pages: 826-829
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.391-392.826
• Online since: December 2011
• Authors: Song Ya Zhang, Zhong Xiao Li, Jia Ling Pu
• Keywords: Poly(aryl ether quinoxaline), Poly(ether benzil), Solubility

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DOI: 10.1016/s0379-6779(97)80206-8