Ageing of VKU-39 Carbon Plastic under Moderately Warm and Tropical Climate Conditions. 1. Changes of Strength Indicators. - Startsev, O. V.; Skirta, A. A.; Startsev, V. O.; Valevin, E. O.; Kogan, A. M. (Polymer Science, Series D. Glues & Sealing Materials, 2025)