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Synthesis and characterization of 4,5-bis(4-fluorobenzoyl)1-methylcyclohexene and its polyethers

机译:4,5-双(4-氟苯甲酰基)1-甲基环己烯及其聚醚的合成与表征

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摘要

A new difluoride 4,5-bis(4-fluorobenzoyl)-1-methylcyclohexene (DFKK) has been prepared with fumaryl chloride, fluorobenzene, and 2-methyl-1,3-butadiene as starting materials through two steps of reactions. This DFKK monomer undergoes reaction with 2,2-(p-hydroxyphenyl)-iso-propane (BPA) in the presence of excess anhydrous potassium carbonate in sulfolane to give a high molecular weight reactive poly(ether ketone ketone) (PEKK) that is very soluble in solvents such as chloroform and N,N-dimethylformamide at room temperature, has glass transition temperature of 182degreesC, and is easily cast into flexible and bale ivory film with tensile strength of 64 MPa. The 5% weight loss temperature is 407degreesC. Ring-closing reaction of PEKK with hydrazine gives cyclized PEKK (CPEKK) with improved thermal stability and reduced solubility. (C) 2002 Wiley Periodicals. [References: 20]
机译:一种新的二氟化物4,5-双(4-氟苯甲酰基)-1-甲基环己烯(DFKK)以富马酰氯,氟苯和2-甲基-1,3-丁二烯为起始原料,通过两步反应制备。该DFKK单体在环丁砜中存在过量无水碳酸钾的情况下,与2,2-(对羟基苯基)-异丙烷(BPA)反应,得到高分子量的反应性聚醚醚酮(PEKK),即在室温下极易溶于氯仿和N,N-二甲基甲酰胺等溶剂中,玻璃化转变温度为182°C,并容易流延成柔性和大包象牙薄膜,拉伸强度为64 MPa。 5%失重温度为407℃。 PEKK与肼的闭环反应可得到具有改善的热稳定性和降低的溶解度的环化PEKK(CPEKK)。 (C)2002 Wiley期刊。 [参考:20]

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