Synthesis and properties of novel organosoluble aromatic poly(ether ketone)s containing pendant methyl groups and sulfone linkages

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Institute of Chemistry, Jiangxi Normal University, Nanchang, 330027, China ^{[1
]}

不详 ^{[2
]}

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Journal of Applied Polymer Science | 2008年 / 107卷 / 01期

关键词：

Several novel aromatic poly(ether ketone)s containing pendant methyl groups and sulfone linkages with inherent viscosities of 0.62-0.65 dL/g were prepared from 2-methyldiphenylether and 3-methyldiphenylether with 4,4′-bis(4- hloroformylphenoxy)diphenylsulfone and 4,4′-bis (3-chloroformylphenoxy) diphenylsulfone by electrophilic Friedel-Crafts acylation in the presence of N,N-dimethylformamide with anhydrous AlCl3 as a catalyst in 1,2-dichloroethane. These polymers, having weight-average molecular weights in the range of 57,000-71,000, were all amorphous and showed high glass-transition temperatures ranging from 160.5 to 167°C, excellent thermal stability at temperatures over 450°C in air or nitrogen, high char yields of 52-57% in nitrogen, and good solubility in CHCl3 and polar solvents such as N,N-dimethylformamide, dimethyl sulfoxide, and N-methyl-2-pyrrolidone at room temperature. All the polymers formed transparent, strong, and flexible films, with tensile strengths of 84.6-90.4 MPa, Young's moduli of 2.33-2.71 GPa, and elongations at break of 26.1-27.4%. © 2007 Wiley Periodicals, Inc;

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页码：683 / 687