- Synthesis and characterization of 4,5-bis(4-fluorobenzoyl)1-methylcyclohexene and its polyethers
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- 论文类型： 期刊论文
- 发表时间： 2002-06-06
- 发表刊物： JOURNAL OF APPLIED POLYMER SCIENCE
- 收录刊物： Scopus、SCIE、EI
- 卷号： 84
- 期号： 10
- 页面范围： 1866-1871
- ISSN号： 0021-8995
- 关键字： 4,5-bis(4-fluorobenzoyl)-1-methylcyclohexene; reactive; poly(aryl ether ketone); ring-closing reaction
- 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.
