In:
Die Makromolekulare Chemie, Wiley, Vol. 194, No. 8 ( 1993-08), p. 2295-2307
Abstract:
Low‐molecular‐weight poly(imide‐amide)s (PIA) obtained by polycondensation at 180°C of 4,4′ ‐methylenedi(phenyl isocyanate), trimellitic acid anhydride and benzoic acid were studied by 1 H and 13 C NMR. Complementary 1 H and 13 C information was used to determine the distribution of II, IA, AA sequences and to show that the repartition of imide (I) and amide (A) groups along the chains is random. According to the composition of the monomer mixture, a slight deficiency of I is reproducibly observed. Non‐reacted benzoic acid is found, and unexpected traces of urea and amic acid groups are present in the PIA chains.
Type of Medium:
Online Resource
ISSN:
0025-116X
,
0025-116X
DOI:
10.1002/macp.02.v194:8
DOI:
10.1002/macp.1993.021940814
Language:
English
Publisher:
Wiley
Publication Date:
1993
detail.hit.zdb_id:
1475026-0
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