Electronic Resource
Bognor Regis [u.a.]
:
Wiley-Blackwell
Journal of Polymer Science Part A: Polymer Chemistry
35 (1997), S. 1703-1710
ISSN:
0887-624X
Keywords:
polyamide-imide
;
kinetic study
;
p-chlorophenol blocked isocyanates
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
To understand the kinetic of synthesis of polyamide-imide (PAI) via p-chlorophenol-(PCP) blocked 4,4′-diphenyl methane diisocyanate (MDI) with trimellitic anhydride (TMA), a series of reactions of blocked MDI with excess phthalic anhydride (PA) and benzoic acid are designed. PCP-blocked phenyl isocyanate (BPI) which also released isocyanate at higher temperatures was used as a model compound for BMDI. The dissociation constants of BPI and BMDI in the presence of excess PA or BA was measured by collecting the evolved CO2. The effect of the catalyst concentration and temperatures were combined by a Hostettler equation. © 1997 John Wiley & Sons, Inc. J Polym Sci A: Polym Chem 35: 1703-1710, 1997
Additional Material:
10 Ill.
Type of Medium:
Electronic Resource
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