含间苯基聚醚酮醚酮酮的合成和性能研究

SYNTHESIS AND PROPERTIES OF POLY(ARYL ETHER KETONE\=ETHER KETONE KETONE)CONTAINING META\|PHENYL LINKS

自英国ＩＣＩ公司开发聚醚醚酮（ＰＥＥＫ）并于八十年代初期商品化以来［１］，聚芳醚酮作为一类新型结构的高性能特种工程塑料得到了惊人的发展，不同结构的聚芳醚酮相继出现．Ｊａｎｓｏｎ［２］等以对苯二甲酰氯（ＴＰＣ）和４，４′二苯氧基二苯酮（ＤＰＢＰ）为单...

A series of poly(aryl ether ketone ether ketone ketone)containing meta\|phenyl link were prepared by low temperature solution polycondensation of 4,4\|diphenoxybenzophenone (DPBP),terephthaloyl chloride(TPC) and isophthaloyl chloride(IPC) in 1 ,2\|dichloroethane and in the presence of AlCl\-3 and NMP.DSC,TGA and wide\|angle X\|ray scattering,etc.were used to study the general properties of the polymers.With the increase of IPC content,the T\-g and crystallinity decreased,the T\-m decreased at first,and then disappeared.But for all meta\|linked polymer,T\-m appeared once more.And this kind of polymer exhibited good chemical resistance. The structures of crystal polymer have a close resemblance to that of poly(ether ketone ketone). The cell dimensions of copolymer containing 30% IPC were calculated to be a=0\^7781 nm,b=0\^6022 nm,and c=1\^012 nm. The kinetics of thermal degradation of it was also studied by dynamic thermogravimetry in nitrogen.The resutls calculated from the kinetic models based on rand om initiation followed by rapid disproportionation and termination were in good agreement with the experimental data.The overall activation energy for degradation was found to be 440\^1 kJmol\+\{-1\}.\=