Citation: Yan-lun Wang, Gang Zhang, Mei-lin Zhang, Yu Fan, Bao-ying Liu, Jie Yang. SYNTHESIS AND CHARACTERIZATION OF POLY(p-ARYLENE SULFIDE KETONE/SCHIFF BASE) COPOLYMERS[J]. Chinese Journal of Polymer Science, ;2012, 30(3): 370-377. doi: 10.1007/s10118-012-1124-4 shu

SYNTHESIS AND CHARACTERIZATION OF POLY(p-ARYLENE SULFIDE KETONE/SCHIFF BASE) COPOLYMERS

Received Date: 17 May 2011
Revised Date: 7 June 2011

Fund Project: This work was financially supported by the National High Technology Foundation of China (No. 2007AA03Z561).

Poly(p-arylene sulfide ketone/Schiff base) copolymers (PASK/SB) were prepared by solution polycondensation of 4,4'-diflurobenzophenone (DFBP) and N-phenyl(4,4'-diflurodiphenyl) ketimine (DFBI) with sodium sulfide in the presence of sodium hydroxide under normal pressure. Elemental analyses, FT-IR, NMR, DSC, TGA and XRD were used to characterize the resultant copolymers. It was found that the copolymers had good thermal properties with glass transition temperature (Tg) of 155.0-172.0℃, melting temperature (Tm) of 298-344℃, 5% weight loss temperatures (Td) of 471.0-501.5℃. These copolymers were almost amorphous with the content of DFBI beyond 30%. The polymer with 100% DFBI had excellent solubility, and it could dissolve in some solvents such as tetrahydrofuran (THF) and N-methyl-2-pyrrolidone (NMP). The processability of polymers was improved. Meantime the viscosity of PASK made from hydrolysis of PASK/SB (H-PASK/SB) was greatly improved from 0.135 dL/g to 0.605 dL/g.
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