The Relaxation Properties of Decking Boards Made from Wood-Polymer Composites (WPC)

Experiments on stress relaxation on the samples representing fragments of terraced boards have been carried out. Matrix polymer is polyvinyl chloride. Measurements conducted at different permanent deformations of compression from 2 to 5% and temperatures from 20 to 70oC. Found that under all conditions the relative relaxation takes small values, indicating the long-term conservation of the mechanical workability of the products. Nonlinear mechanical behavior is evident already at 3% strain. At temperatures from 20 to 35°C relaxation processes take place almost identically, without reduction in initial and final stress. At temperatures of 50 and 70oC both stresses are reduced. The master curve is plotted, which allows prediction the mechanical behavior for a long time.

A.A. ASKADSKII^{1, 2}, Doctor of Sciences (Chemistry), Head of Laboratory (This email address is being protected from spambots. You need JavaScript enabled to view it.);
K.S. PIMINOVA², Master (This email address is being protected from spambots. You need JavaScript enabled to view it.), A.V. MATSEEVICH2, Juniour Researcher (This email address is being protected from spambots. You need JavaScript enabled to view it.) 

1 National Research Moscow state university of civil engineering (26, Yaroslavskoe Highway, Moscow, 129337, Russian Federation) 
2 Institute of Organoelement Compounds Russian Academy of Sciences (28, Vavilova Street, Moscow, 119991, Russian Federation)

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