Properties of novel poly (aryl ether quinoxaline)s (PEQs)
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摘要: 使用4,4-二氟代二苯甲酰与双酚A的溶液缩聚得聚醚苯偶酰(PEB),再用邻苯二胺及少量4,4-二苯醚-1,2 二胺(OBDA)对PEB改性,两步法合成得到3种新型聚苯基醚喹噁啉(PEQs).实验表明这些PEQs聚合物能在多种常规有机溶剂中溶解(如DMF、THF等);采用四氢呋喃溶解PEQs,将其涂布成膜,发现该膜在可见光区具有良好的透光性(450 nm处的透光率高达85%);此外,它们还具有较高的玻璃化转变温度(Tg210 ℃)、良好的热性能、优异的耐酸碱性和较好的力学性能,具有潜在应用前景.Abstract: Novel poly(aryl ether quinoxaline)s (PEQs) were prepared via a new two-step procedure. Firstly, poly (ether benzil) (PEB) was synthesized by the polycondensation of 4,4-difluorobenzil and 4,4-isopropylidenediphenol. Then, PEQs were synthesized through chemical modification of PEB by 1,2-diaminobenzene and a small amount of 4,4-oxydibenzene-1,2-diamine(OBDA). The polymers were characterized by IR, NMR, TMA and other measurements. Experiments show that these PEQs can be dissolved in common organic solvents, such as DMF and THF; these PEQs were dissolved in THF to get films which had good transmittance in the visible region (the transmittance was up to 85% at 450 nm). In addition, they also had higher glass transition temperatures (Tg210 ℃), good thermal and mechanical properties, as well as excellent resistance to strong acid and alkali. They are expected to be useful functional materials.
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Key words:
- poly(aryl ether quinoxaline) /
- materical performance /
- ultraviolet aging
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