Influence of aggressive media on mechanical properties of wood-polymer composites

T V Zhdanova,A A Askadskii,E S Afanasiev,T A Matseevic,E M Chaika

doi:10.35164/0554-2901-2020-7-8-16-20

Abstract

Mechanical properties of two samples of decking boards were measured after exposure in rain and chlorinated water, in ice, and in a mixture of gasoline and water in diﬀerent concentrations from 1 to 7%. Samples consisting of 60% wood flour, 30% polyvinyl chloride and 10% additives were used for measurements. Additives are flame retardants, stabilizers, modifiers and dyes. The mineral filler CaCO3 was used as modifiers. For sample №1, the CaCO3 content was 42% and the wood content was 18%. For sample №2, the CaCO3 content was 24% and the wood content was 36%. As a result of measurements after exposure for 150 days, it was found that the specific impact strength increases by 120%, the bending strength decreases by 60%, and the Shore D hardness decreases by a maximum of 10%. Consequently, decking boards can be confidently used for a long time, since a number of properties almost do not change, but even increase, and some decrease in strength remains within acceptable values.

Highlights

Проведены измерения механических свойств двух образцов террасных досок после экспозиции в дождевой и хлорированной воде, во льду и в смеси бензина с водой в разных концентрациях от 1 до 7%
Mechanical properties of two samples of decking boards were measured after exposure in rain and chlorinated water, in ice, and in a mixture of gasoline and water in different concentrations from 1 to 7%
As a result of measurements after exposure for 150 days, it was found that the specific impact strength increases by 120%, the bending strength decreases by 60%, and the Shore D hardness decreases by a maximum of 10%

Summary

Introduction

Проведены измерения механических свойств двух образцов террасных досок после экспозиции в дождевой и хлорированной воде, во льду и в смеси бензина с водой в разных концентрациях от 1 до 7%.

Results

Conclusion