耐热高透明聚醚砜醚酮酮的合成和表征

Synthesis of Heat-resistant and Transparent Poly(Ether Sulfone Ether Ketone Ketone)

以芳醚单体4,4′-二苯氧基二苯砜(DPODPS)与1,4-环己二甲酰氯(CHDC),在以路易斯酸无水三氯化铝(AlCl3)为催化剂下进行亲电取代缩合聚合,制备了一种大分子主链含环己基和砜基的聚醚砜醚酮酮(PESEKK)树脂。结果表明,PESEKK树脂为非晶态结构,玻璃化转变温度(Tg)为204℃,热分解温度(Td)为440℃,具有优异的热性能;树脂可溶解于二甲基亚砜、N-甲基吡咯烷酮、氯仿等有机溶剂中,并可涂膜制得高透明薄膜,薄膜紫外光透过截止波长为350 nm,在可见光范围内透过率大于80%;薄膜拉伸强度为72 MPa,弹性模量为1.89 GPa,力学性能较好。

A kind of heat-resistant and transparent poly(ether sulfone ether ketone ketone)(PESEKK)containing cyclohexyl and sulfonyl was prepared by electrophilic substitution condensation polymerization from 4,4′-diphenoxy diphenylsulfone(DPODPS)and cyclohexyl-1,4-dicarboxylchloride(CHDC)with AlCl3 as the catalyst.The experimental results show that the PESEKK resin is amorphous with good thermal properties.The glass transition temperature(Tg)and thermal decomposition temperature(Td)are 204 and 440℃,respectively.The resin can be dissolved in dimethyl sulfoxide(DMSO),N-methyl pyrrolidone(NMP),chloroform(CDCl3)and other organic solvents,and can be coated to prepare highly transparent film.The cut-off wavelength of ultraviolet light transmission of the film is 350 nm and the transmittance is more than 80%in the visible light range.The film has good mechanical properties with a tensile strength of 72 MPa and a tensile modulus of 1.89 GPa.