聚醚砜醚酮的合成与性能

Synthesis and Properties of Poly (ether sulfone ether ketone)

以4,4'-二羟基二苯砜和4,4'-二氟二苯酮为单体,通过溶液缩聚合成了聚醚砜醚酮(PESEK),其分子结构相当于聚醚砜(PES)与聚醚醚酮(PEEK)的交替共聚物.在共聚物分子中,存在砜基、醚基和酮基,整个结构单元形成了大共轭体系,聚合物属无定形聚合物,玻璃化转变温度(Tg)为198℃,介于PEEK和PES的Tg之间,其热稳定性和加工性能优于PES,而力学性能与PES接近.

Poly（ether sulfone ether ketone）（PESEK） was synthesized from 4,4＇-sulfonyldiphenol and 4,4＇difluorobenzophenone through nucleophilic polycondensation.The molecular structure of PESEK equals to alternating copolymer of PES and PEEK.The glass transition temperature of PESEK,belonging to amorphous polymer,is 198 ℃.Its thermal stability and melt flow are better than PES.The results show that PESEK owns good processing property.