2015 (1) 2

https://doi.org/10.15407/polymerj.37.01.011

Thermal characteristics and phase structure of thermostable polyimide/polyurethane film materials

О.P. Grigoryeva1, А.М. Fainleib1, О.M. Starostenko1, Т.А. Shantalii1, K.G. Gusakova1, V.V. Davidenko1, J.M. Saiter2, B. Youssef 2,3

1Institute of Macromolecular Chemistry NAS of Ukraine

48, Kharkivs’ke shose, Kyiv, 02160, Ukraine

2AMME-LECAP International Lab EA 4528 Universitе de Rouen

76801 St. Et. du Rouvray, France

3INSA de Rouen, BP 08 Av. de l’Universitе

76801, St. Etienne du Rouvray, France

Polym. J., 2015, 37, no. 1: 11-19.

Section: Structure and properties.

Language: Russian.

Abstract:

Novel thermostable materials based on polyimide (PI), and linear segmented polyurethane (PU) have been synthesized and studied. The film samples were obtained by in situ imidizationof polyamic acid (PAA) in the presence of 5 – 95 % wt. of PU. Using FTIR spectroscopy, TGA and DSC techniques the effect of composition on chemical structure and thermal properties as well as thermal-oxidative stability of the resulting PI/PU film materials has been investigated. Non-additive changes of thermal characteristics and thermal-oxidative stability with varying PI/PU ratio has been establish. Formation of the mixed microphases with varying component content during synthesis procedure has been found using DSC measurements. The microphase component ratio has been calculated using Fox and Couchman equations.

Key words: thermostable polyimide/polyurethane film materials, segmented polyurethane, thermal oxidative degradation, microphase structure.

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