NUCLEOPHILIC DISPLACEMENT POLYMERIZATION OF N , N ′-BIS( p -CHLOROBENZYLIDINE)-4,4′ - DIAMINODIPHENYL METHANE WITH SODIUM SULFIDE

Mohanty, Amar K.; Misra, Manjusri; Misra, Basanta K.

doi:10.1016/s0014-3057(96)00293-5

Cited by 5 publications

(1 citation statement)

References 15 publications

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“…The calculated result should have seven groups of peaks and the ratio of corresponding integral curves was 2:2:2:2:2:2:1. Because the entanglement of the macromolecular chains and high viscosity of the solution limited molecule oscillation [15] , the chemical shifts of 2, 3, 4 and 5 were so approximate that the weak split signals were shielded. Combining with the FT-IR results, it can be concluded that these seven groups of peaks were ascribed to the construction units of 1, 2, 3, 4, 5, 6 and 7.…”

Section: Chain Structure Of Copolymersmentioning

confidence: 99%

Synthesis and characterization of poly(p-arylene sulfide ketone/Schiff base) copolymers

Wang

Zhang

et al. 2012

Chin J Polym Sci

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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 (T g ) of 155.0−172.0°C, melting temperature (T m ) of 298−344°C, 5% weight loss temperatures (T d ) of 471.0−501.5°C. 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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Section: Chain Structure Of Copolymersmentioning

confidence: 99%