Effect of composition on the thermophysical properties of bulk polymerized polyurethanes prepared from hexamethylenedi-isocyanate

Yagfarova, T.A.; Cherkasova, L.A.; Apukhtina, N.P.; Yagfarov, M.Sh.; Teitel'baum, B.Ya.

doi:10.1016/0032-3950(74)90577-2

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1982

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“…The maintenance of the segregated structure in the melt provides conditions for prompt crystallization. In some cases, even quenching the samples in liquid nitrogen is not efficient enough for obtaining an amorphous material [8].…”

Section: !Yj20mentioning

confidence: 99%

TMA as a method of investigation of the phase structure of segmented polyurethanes

Teitel'baum

Yagfarova

1981

Journal of Thermal Analysis

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A complex of methodical approaches for investigating structural changes under the influence of temperature are presented on the basis of modern coxacepts of the domain structure of block copolymers. Effects oJ formation of structure due to phase segregation, crystallization processes and those of thermal homogenization have been considered in connection with the deformational properties of polymers. One and the same polymer appears to ha~e quite different phase structures and properties when obtained by altering its thermal conditions. Thermomechanical analysis is shown to be a most efficient technique for investigating the changes in the phase structure of a wide series of polyether(ester)urethanes and -urethaneureas.

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Section: !Yj20mentioning

confidence: 99%