TY - JOUR
T1 - Synthesis of Poly(aryl Ether Ketone)s from New Bisphenol Monomers
AU - Juan Xie, Wei-Ya Peng, Guang Li & Jian-Ming Jiang
JO - Journal of Fiber Bioengineering and Informatics
VL - 3
SP - 142
EP - 147
PY - 2010
DA - 2010/03
SN - 3
DO - http://doi.org/10.3993/jfbi
UR - https://global-sci.org/intro/article_detail/jfbi/4960.html
KW - Poly(aryl ether sulfone)
KW - fluoro-substituted phenyl
KW - solubility
KW - mechanical property
KW - dielectric property
AB - New bisphenol monomers, (4-fluoro)phenylhydroquinone and (3,4-bifluoro) phenylhydroquinone, were prepared in a two-step 
synthesis. Poly(aryl ether ketone)s were derived from these bisphenols via a nucleophilic aromatic substitution polycondensation 
with 4,4'-Difluorobenzophenone. The polycondensation proceeded quantitatively in N,N-dimethyl acetamide (DMAc) in the 
presence of anhydrous potassium carbonate and afforded the polymers with inherent viscosities of 0.50 and 0.92 dL/g. The glass 
transition temperatures were 151°C and 159°C respectively. The polymers also had high thermal decomposition temperatures and 
the temperatures of 5% weight loss were all above 527°C and the 10% weight loss were above 587°C in nitrogen atmosphere. 
There were no melting endotherms that were observed on DSC traces, which indicated that the copolymers were amorphous and 
the amorphous structures were further confirmed by wide-angle X-ray diffraction. The polymers' solubility was improved by the 
introduction of bulky pendant groups and all of them exhibited good solubility in some common solvents such as NMP, DMF, 
DMSO, CH2Cl2, THF, CHCl3 etc. Transparent, strong and flexible films were formed by the DMAc solutions of the polymers with 
tensile strengths of 98.3 MPa, 95.2 MPa, Young's moduli of 2.74 GPa, 3.06GPa and elongation at break of 27%and 32%. The 
dielectric constants at 1 MHz of the polymers were 2.82 and 2.75.