Abstract
A novel approach for the preparation of hard elastic polymeric material based on ultra-high molecular weight polyethylene via the strategy of crazing of polymers has been proposed. This approach includes the process of deformation of the pristine films of ultra-high molecular weight polyethylene via environmental intercrystallite crazing mechanism and subsequent low-temperature spontaneous strain recovery upon stress relaxation. As a result, the material acquires new properties typical for hard elastic materials: restoration of the porous structure upon secondary loading in air up to ~20 vol. % with pore sizes in the nanometer range (up to 10 nm), high reversibility of deformation (50−85%), the effect of opening and closing pores upon cyclic loading. The mechanism of this phenomenon has been proposed and the areas of practical applications of such mechanoresponsive material have been indicated.
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