In:
Journal of Polymer Science: Polymer Chemistry Edition, Wiley, Vol. 21, No. 5 ( 1983-05), p. 1241-1249
Kurzfassung:
New polyphthalimidine‐forming monomers, 5,5′‐(oxydi‐ p ‐phenylenedicarbonyl)bis(3‐benzylidenephthalide) and the 6,6′‐derivative, were synthesized by the Friedel–Crafts reaction of diphenyl ether with 5‐ and 6‐chloroformyl‐3‐benzylidenephthalide, respectively. The direct polycondensation of these bisphthalides with both aliphatic and aromatic diamines in o ‐phenylphenol at 200–250°C afforded polyphthalimidines having inherent viscosities of 0.2–1.2 dL/g in almost quantitative yields. Syntheses of aliphatic polyphthalimidines with higher inherent viscosities were also achieved by a two‐step procedure involving ring‐opening polyaddition and subsequent thermal cyclodehydration. All the polymers were amorphous and readily soluble in N ‐methyl‐2‐pyrrolidone (NMP), m ‐cresol, nitrobenzene, pyridine, and chloroform. Tough and flexible films could be cast from NMP solutions of the polymers. Glass transition temperatures of the polyphthalimidines were in the range of 158–246°C. The thermogravimetry of the aromatic polymers showed 10% weight loss in air and nitrogen at 445–515 and 500–520°C, respectively. The crosslinking reaction of some benzylidenependant polyphthalimidines took place at 300°C through double‐bond addition to afford cured polymers with improved thermal stability.
Materialart:
Online-Ressource
ISSN:
0360-6376
,
1542-9369
DOI:
10.1002/pol.17.v21:5
DOI:
10.1002/pol.1983.170210501
Sprache:
Englisch
Verlag:
Wiley
Publikationsdatum:
1983
ZDB Id:
3004641-5
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