3种新型聚苯基醚喹噁啉的合成

Synthesis of Three Novel Poly(aryl ether quinoxaline) s

用4,4'-二氟代二苯甲酰与双酚A的溶液缩聚制得聚醚苯偶酰(PEB),经邻苯二胺改性后,通过两步法得到聚苯基醚喹噁啉(PEQ-1)。在PEB的改性反应中加入质量分数分别为1.0%和1.3%的3,3',4,4'-四胺基二苯醚,可有效增加聚苯基醚喹噁啉的相对分子质量,得到PEQ-2和PEQ-3(总收率≥90%),其质均相对分子质量分别为7.492×104和1.486×105。并用IR、NMR等对这些聚合物进行了表征。该法操作简便,具有潜在的应用价值。

Novel poly（aryl ether quinoxaline）s （PEQs） were prepared via a new two-step procedure. First, poly （ether benzil） （PEB） was synthesized by the polycondensation of 4, 4＇-difluorobenzil and 4,4＇- isopropylidenediphenol. Then, PEQ-1 was synthesized through chemical modification of PEB by 1,2- diaminobenzene. The mass average relative molecular mass of the PEQs could be adjusted easily as 7.492 ×10^4 and 1. 486 × 10^5 by the addition of 1.0% and 1.3% mass fraction of 4,4＇-oxydibenzene-1,2- diamine, respectively. The total yield of this two-step method is above 90%. The polymers were characterized by IR, NMR and other measurements. The method is simple and has a potential application value.