Phase equilibrium and interdiffusion in the oligo(3,3-bis(azidomethyl)oxetane)-oligo(3-methyl-3-azidomethyloxetane) system

Autor:	A. E. Chalykh, G. S. Kulagina, R. R. Khasbiullin, S. A. Pisarev, Yu. M. Mikhailov, Elmira R. Badamshina
Rok vydání:	2010
Předmět:	chemistry.chemical_classification Polymers and Plastics Phase equilibrium Diffusion Polymer Atmospheric temperature range Oxetane chemistry.chemical_compound Crystallography chemistry Polymer chemistry Materials Chemistry Binary system Azide Phase diagram
Zdroj:	Polymer Science Series A. 52:272-278
ISSN:	1555-6107 0965-545X
DOI:	10.1134/s0965545x10030089
Popis:	Intersolubility and interdiffusion in the oligo(3,3-bis(azidomethyl)oxetane)-oligo(3-methyl-3-azidomethyloxetane) binary system are studied. The components of the system differ in symmetric and non-symmetric positions of azide groups along the polymer chain, respectively. The chemical and conformational features ensure the ability of oligo(3,3-bis(azidomethyl)oxetane) to crystallize at temperatures of ∼50°C. The system of azidooxetane oligomers is characterized by a simple crystalline equilibrium crystal-melt. The generalized phase diagram of the binary system is constructed. The interdiffusion zones of oligomers are analyzed in detail in a wide temperature range, and a number of specific effects manifesting themselves during their intersolubility are observed. The concentration and temperature dependences of diffusion coefficients are examined, and the activation energies of diffusion are calculated.
Databáze:	OpenAIRE
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