| Abstract: | The authors have studied the kinetics of "bleeding" during the heating of oriented and non-oriented plexiglas with accrued operating times of up to 16,000 h. They show that bleeding of the products of degradation of macromolecules from plexiglas is accompanied by a decrease in the volume of the polymer, which causes tensile stresses in the surface layers and may lead to surface cracking."Lenin Komsomol" Riga Red Banner Institute of Civil Aviation Engineers. Translated from Mekhanika Polimerov, No. 2, pp. 346–348, March–April, 1974. |
