New approach to the mechanical rejuvenation of polymer glasses based on the formation of extended ductile time period

Voznyak, А.V. and Возняк, Андрій Васильович and Voznyak, Yu.V. and Возняк, Юрій Васильович and Voznyak, A. O. and Возняк, А. О. (2017) New approach to the mechanical rejuvenation of polymer glasses based on the formation of extended ductile time period. Обладнання та технології харчових виробництв (1(34)). pp. 54-65. ISSN 2079-4827

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Abstract

For example polluted (PLA) have shown the possibility of mechanical rejuvenation of polymer glasses at high temperatures and shear strain. It is established that plasticization in terms of mechanical rejuvenation is associated with the formation of the structure of the PLA of the shear bands. The mechanisms of interaction between shear bands and crazv in the structure of glassy PLA in the process of its deformation. It is shown that shear bands are responsible for the nucleation of a large number of crazv, and also contribute to the inhibition of their further development by blunting of the ends crazv, change of direction, blocking, and inhibition of their development. As a result, there is a sliding nature of plastic flow PLA (observed the formation of a neck). The regularities of the forma-tion and evolution of structures of polymer glasses at different levels of structural organization as a result of the mechanical process of rejuvenation. The results obtained will provide a common approach to the initiation of processes of mechanical rejuvenation in polymer glasses with the aim of improving mechanical properties, in particular, formation of extended plasticity.

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