ISSN:
1022-1352
Keywords:
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Physics
Notes:
New poly(urea-imide)s having inherent viscosities of 0.26-0.57 dL/g were synthesized in two steps by ring-opening polyaddition of N,N′-dimethyl-N,N′-bis(aminophenyl)ureas to various aromatic tetracarboxylic dianhydrides giving poly(amic acid)s, followed by thermal cyclodehydration. All the poly(urea-imide)s showed amorphous patterns in the wide angle X-ray diffractograms. Most of the poly(urea-imide)s were soluble in organic solvents, especially phenolic solvents such as m-cresol and o-chlorophenol, and the polymers synthesized from the 3,4′-type diamine were more soluble than those from the 4,4′-type monomer. The glass transition temperatures and 10% weight loss temperatures under nitrogen of the poly(urea-imide)s were in the range of 218-263°C and 455-500°C, respectively.
Additional Material:
1 Ill.
Type of Medium:
Electronic Resource
