Release Time:2019-03-10  Hits:

Indexed by: Journal Article

Date of Publication: 2002-06-06

Journal: JOURNAL OF APPLIED POLYMER SCIENCE

Included Journals: EI、SCIE、Scopus

Volume: 84

Issue: 10

Page Number: 1866-1871

ISSN: 0021-8995

Key Words: 4,5-bis(4-fluorobenzoyl)-1-methylcyclohexene; reactive; poly(aryl ether ketone); ring-closing reaction

Abstract: 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.