Impact assessment of storage time on the properties of prepregs and mechanical properties of skis
https://doi.org/10.21266/2079-4304.2023.242.189-203
Abstract
The article presents the topical question regarding the application of modern polymer composites to create new demanded products on their basis. The technology of the described composites consists in impregnation of reinforcing fibrous glass material, which is achieved by uniform distribution of polymeric epoxy binder on the fibrous base. The article analyzes two objects of research, which are prepregs and plastic skis. The impact assessment of time and storage conditions of prepregs on its technological properties based on the developed binder has been evaluated. Prepregs with different periods of storage were used for the bonding of experimental skis, their mechanical properties were analyzed. To assess the properties of prepregs, we used methods that include the study of changes in unit weight, binder content, volatile product content and degree of polymerization. The properties were studied throughout the experiment – over 90 days. Ski properties were evaluated according to GOST 30199–94, GOST 17043–90 and GOST 30045–93 by the following indicators: ski weight, ski slope, position of the ski center of gravity, rigidity and bending strength, residual deflection, rigidity of the front and rear parts of the ski, fatigue under cyclic loading. The main characteristics of the skis were studied immediately after bonding. It was found that the indicators selected to confirm the manufacturability of prepregs allowed to adequately assess their «survivability». Based on the results of the work, conclusions were made about the use of prepregs for their intended purpose while observing the storage conditions without compromising the quality of modern plastic skis.
About the Authors
E. I. Hapankova
State scientific institution «Institute of physical organic chemistry of The National academy of sciences of Belarus»
Belarus
Belarus
HAPANKOVA Alena I. – researcher of the Laboratory of Membrane Processes
220072. Surganov str. 13. Minsk
I. A. Latyshevich
State scientific institution «Institute of physical organic chemistry of The National academy of sciences of Belarus»
Belarus
Belarus
LATYSHEVICH Iryna A. – researcher of the Laboratory of Membrane Processes
220072. Surganov str. 13
N. G. Kozlov
State scientific institution «Institute of physical organic chemistry of The National academy of sciences of Belarus»
Belarus
Belarus
KOZLOV Nikolay G. – DSc (Chemistry), Leading Researcher of the Laboratory of Membrane Processes
220072. Surganov str. 13. Minsk
A. V. Bildyukevich
State scientific institution «Institute of physical organic chemistry of The National academy of sciences of Belarus»
Belarus
Belarus
BILDYUKEVICH Alexander V. ‒ DSc (Chemistry), academician, Leading Researcher, Head of a theme group of chemistry of nitrogen-containing organic substances
220072. Surganov str. 13. Minsk
References
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Review
For citations:
Hapankova E.I., Latyshevich I.A., Kozlov N.G., Bildyukevich A.V. Impact assessment of storage time on the properties of prepregs and mechanical properties of skis. Izvestia Sankt-Peterburgskoj lesotehniceskoj akademii. 2023;(242):189-203. (In Russ.) https://doi.org/10.21266/2079-4304.2023.242.189-203
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