Fully ordered copolyhydrazides based upon bisacid A2 | Zendy

Lenk R. S. | Zendy

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Fully ordered copolyhydrazides based upon bisacid A2

Author(s) -

Lenk R. S.

Publication year - 1977

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.1977.070210901

Subject(s) - differential scanning calorimetry , formic acid , amorphous solid , glass transition , materials science , copolymer , polymer chemistry , ultimate tensile strength , polymer , chemical engineering , chemistry , composite material , crystallography , organic chemistry , thermodynamics , physics , engineering

The preparation of copolyhydrazides containing equimolar quantities of “bisacetyl A2” and terephthaloyl or isophthaloyl groups is described. The resulting copolymers were found to form clear colorless films which, when immersed in concentrated formic acid, softened but rehardened and turned white after subsequent immersion in water. The formic acid treatment did not bring about a morphological change from the amorphous to the crystalline state, but caused changes in the differential scanning calorimetry (DSC) traces which suggest that an α/β transformation had taken place. The possible nature of this transition is discussed. The results of tensile tests on cast film are given.

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