磺化聚芳醚腈砜酮热、氧化及水解稳定性能研究

Research on thermostability,oxidative and hydrolysis resistance for sulfonated poly(phthalazinone ether nitrile sulfone ketone)

将自制二氮杂萘酮类双酚(DHPZ),与自制的磺化4,4′-二氯二苯砜(SDCS)、商用2,6-二氯苯腈(DCBN)及4,4′-二氟二苯酮(DFK)进行高温缩合共聚合反应,合成了一系列磺化度可任意调控的新型磺化聚芳醚腈砜酮(SPPENSKs)共聚物.采用热失重分析仪(TGA)分析得到磺化度0.80的SPPENSK的5%热失重温度为455.0℃.把此系列聚合物溶解在N-甲基吡咯烷酮(NMP)中,刮制成膜,研究了SPPENSKs膜的热稳定性、水解稳定性、抗氧化等性质以及离子交换容量IEC等.研究结果表明新型磺化聚合物膜有良好的耐热稳定性、水解稳定性及抗氧化稳定性等.SPPENSK-80膜的IEC为1.32 mmol/g,高于Nafion1135的IEC(0.91 mmol/g).

Sulfonated poly（phthalazinone ether nitrite sulfone ketone）s （SPPENSKs） with sulfonated groups prepared by direct polycondensation of sulfonated 4,4＇-dichlorodiphenylsulfone（SDCS）, 4, 4＇-difluorobenzophenone （DFK）, 2,6-dichlorobenzonitrile （DCBN）, 4-（4-hydroxyphenyl）-1（2H）- phthalazinone （DHPZ） at high temperature was utilized to investigate their physiochemical properties. The thermo-stability of SPPENSK-80 was detected by TGA. The 5% weight loss temperature is 455.0 ℃. The membranes of polymers were cast successfully using N-methylpyrrolidone as solvent. The hydrolysis resistance, oxidative resistance and IEC of the membranes were studied. The results indicate that membranes of SPPENSKs have good thermo-stability, hydrolysis resistance and oxidative resistance, etc.. The IEC of SPPENSK-80 is 1.32 mmol/g, which is higher than that of Nafion1135 （0.91 mmol/g）.