Strain and stress evolution in organic glasses with different structures at non-uniform heating

Yakovlev N.O., Mekalina I.V., Kharitonov G.M., Khitrova O.I.
UDC
620.1:629.4.023.18
DOI
10.18577/2307-6046-2017-0-3-10-10
Article PDF (Russian) (866.64 KB)
How to cite
Yakovlev N.O., Mekalina I.V., Kharitonov G.M., Khitrova O.I. Strain and stress evolution in organic glasses with different structures at non-uniform heating // Proceedings of VIAM. 2017. No. 3. DOI: 10.18577/2307-6046-2017-0-3-10-10. URL: https://test.viam.ru/en/journal/2017/3/10
Keywords
organic glass, polymethylmethacrylate, relaxation behavior, rubber-like elastic strain.
Abstract

The strain and stress evolution characteristics of the organic glass with linear (SO-120, Tg=120°C) and copolymer rarely cross-linked structures (VОS-2, Tg=148°C) and oriented versions thereof – АО-120 (orientation degree 60 and 79%) and VОS-2АО (orientation degree 50%), accordingly, at a non-uniform heating across the thickness, were investigated. It was shown that the rubber-like elastic strain by heating, thermoelastic and residual temperature stress in organic glazing in a large extent depend on the modulus of elasticity and coefficient of linear expansion of the glass. The oriented glass tightness similar to the tightness of the elementary layers of glazing at non-uniform heating has a significant impact on the development of shrinkage strain in the layers. These deformations cause an increase in tensile stresses during cooling and residual temperature stress.

This work was performed as part of the comprehensive scientific areas 2.2. «Qualification and materials research» («The strategic directions of development of materials and technologies of their processing for the period till 2030») 

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