Relaxation properties of gradient polymer materials based on network poly(urethane-isocyanurates) produced via a modified method |
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| Authors: | M D Petunova A A Askadskii L M Goleneva G G Nikiforova L A Vasserman O V Kovriga V A Markov |
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| Institution: | 1.Nesmeyanov Institute of Organoelement Compounds,Russian Academy of Sciences,Moscow,Russia;2.Emanuel Institute of Biochemical Physics,Russian Academy of Sciences,Moscow,Russia |
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| Abstract: | The relaxation properties of gradient polymer materials produced via a modified method are studied through dynamic mechanical
analysis and through measurement and approximation of stress-relaxation curves in a wide temperature range under static conditions.
The physicomechanical properties of polymer materials produced via the new method are substantially improved, and the range
of properties is markedly widened. The investigated materials can possess any values of the elastic modulus, including those
inherent in the region of transition from the glassy state to the rubbery state; moreover, they demonstrate a quasi-elastic
behavior characteristic of glasses and rubbers. |
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