ISSN:
0887-624X
Keywords:
nickel
;
coupling polymerization
;
aromatic dichloride
;
polyamide
;
poly[(2,5-dimethyl-1,4-piperazinediyl) (4,4′-biphenyldicarbonyl)]
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
Four aryl dichlorides containing secondary amide structural units as monomers were synthesized from substituted piperazines and chlorobenzoyl chlorides. Polyamides were prepared by the nickel-catalyzed coupling polymerization of these monomers. Polymerizations were carried out in N-methyl-2-pyrrolidinone (NMP) in the presence of nickel chloride, zinc, triphenylphosphine, and bipyridine, and resulted in polyamides with inherent viscosities up to 0.38 dL/g under mild conditions. The structure of polymer was determined by IR and 13C-NMR spectroscopies. The polyamide, poly[4,4′-biphenyldicarbonyl (2,5-dimethylpiperazine)] 6d, was readily soluble in dipolar aprotic solvents and chloroform. Thermogravimetry of polyamides, poly[(4,4′-biphenyldicarbonyl piperazine)]s 6, showed 10% weight loss at around 425 and 450°C in air and under nitrogen, respectively. © 1992 John Wiley & Sons, Inc.
Additional Material:
4 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pola.1992.080300808
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