ISSN:
0360-6376
Keywords:
Physics
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
Notes:
A novel class of polypyridazinophthalazinediones has been synthesized by the solution cyclopolycondensation in m-cresol of dibenzoylphthalic acids with aromatic dihydrazines such as bis(4-hydrazinophenyl)methane and bis(4-hydrazinophenyl) sulfone. The polyheterocycles derived from 4,6-dibenzoylisophthalic acid, which had inherent viscosities of up to 0.5, were soluble in m-cresol and hot dichloroacetic acid, whereas the polymers from 2,5-dibenzoylterephthalic acid were practically insoluble in organic solvents. Thermogravimetric analyses showed that all the polymers underwent weight losses of 10% at 490-520°C in both air and nitrogen.
Additional Material:
2 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pol.1976.170141119
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