聚芳硫醚砜(PASS)研究进展

Research Progress in Poly( arylene sulfide sulfone)

作为聚苯硫醚(PPS)的结构改性物,聚芳硫醚砜(PASS)具有优异的机械性能、耐高温性、尺寸稳定性、耐腐蚀、阻燃和优良的电性能等。由于PASS本身具有的优势,使其在环保、军工、电气、机械、航空等领域具有很好的应用前景。目前国内PASS的合成技术日趋成熟并有望在近年内实现工业化生产。总结了近年来国内尤其是四川大学在PASS基本特性、改性和应用等方面的研究进展:(1)针对PASS在NMP溶液中的不稳定现象,发现并研究了PASS/NMP的结晶溶剂化物,对其形成的过程、结构及结晶行为进行了系统的研究。(2)通过复配助剂以及PPS的引入很好地改善了PASS的熔体稳定性和流动性,改善了其熔融加工性,并对PASS/PPS共混体系进行了深入研究。合理控制加工工艺,成功地制备了性能优良的PASS/连续纤维复合材料。(3)探究氧化处理后PASS分离膜的耐溶剂性,通过配方和工艺的改进制备出一系列不同孔径和结构的PASS耐腐蚀分离膜,通过引入改性纳米二氧化钛成功地制备了抗污染PASS分离膜。这些研究为PASS的产业化应用打下了坚实的基础。

As a chemical structurally modified substance of polyphenylene sulfide （ PPS）, Poly （ arylene sulfide sulfone） （PASS） exhibits outstanding mechanical properties, heat resistance, dimensional stability, corrosion resistance, flame retar- dancy and electrical properties, etc. Because of the superiority, PASS has a good application prospect in the fields of environ- mental protection, military industry, electrical industry, machinery and aviation. This review introduced the physical proper- ties, melt modification and membrane preparation of PASS： （1） PASS/NMP crystal-solvate was discovered from the unstable phenomenon. And its formation, structure and crystallization behavior was studied systematically; （2） With the addition of PPS and compounding processing aids, the melt stability and fluidity of PASS were improved dramatically, which made it suit- able for melt processing. The morphology of blends of PASS/PPS was studied at the same time, and the continuous fiber rein- forced PASS composites were successfully prepared. （3） The solvent resistance of post-oxidated PASS membrane was explored. By adding various additives, PASS membranes with different pore size and cross-section morphology were prepared. Also anti- fouling PASS/TiO2 hybrid membranes were made via introducing PAA modified TiO2nano-particles.