Description of the structure of branched polyphenylquinoxaline macromolecular coil within the framework of fractal theory

Козлов, Г. В.; Долбин, И. В.; Заиков, Г. Е.

doi:10.1002/app.22939

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“…It was also used as catalyst carriers, pervaporation and other functional membranes. A lot of work has been done to develop various PQs and expand their applications [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

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

Zhang

2011

AMR

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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 (Tg) 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.

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“…It was also used as catalyst carriers, pervaporation and other functional membranes. A lot of work has been done to develop various PQs and expand their applications [1][2][3].…”

Section: Introductionmentioning

confidence: 99%