Effects of accelerated and outdoor ageing on leachability and properties of compreg-laminated sesenduk wood

Mohammad Fitri K., . and Zaidon Ashaari, . and Lee S. H., . and Nabil Fikri L., . and Edi-Suhaimi Bakar, . Effects of accelerated and outdoor ageing on leachability and properties of compreg-laminated sesenduk wood. pp. 198-207. ISSN 0128-1283

This study evaluated the effects of accelerated and outdoor ageing on compreg-laminated sesenduk (Endospermum diadenum) wood and correlations between these two ageing methods were established. For outdoor ageing samples were exposed to tropical weather for 1 3 and 6 months. For accelerated ageing cyclic boil“dry treatment involving 1 2 5 and 10 cycles were employed. Results revealed that density and weight loss were observed after the ageing treatments. After 6 months of outdoor ageing water absorption of aged phenol formaldehyde and phenol formaldehyde urea-treated samples increased from 3.0 to 13.3 and from 4.1 to 26.6 respectively. Similar behaviour was also observed for samples which underwent 10 cycles of accelerated ageing. Samples subjected to outdoor ageing had thickness swelling higher than that of accelerated ageing (4.3“4.5 vs 2.4“3.7). Most of the samples lost 8.3 to 22.4 of initial modulus of rupture after 1 month of outdoor ageing. Treated samples retained 61.7 to 77.1 of its initial modulus of elasticity after 10 cycles of accelerated ageing while the untreated samples retained only 48.7. Emission of formaldehyde decreased with increased exposure times and cyclic boil“dry cycles. As confirmed by Pearsons correlation test there were good correlations (r 0.71“0.99) for properties of samples between accelerated ageing and outdoor ageing.

Full text available from: Official URL: https://www.frim.gov.my/v1/jtfsonline/jtfs/v29n2/1...

Abstract

This study evaluated the effects of accelerated and outdoor ageing on compreg-laminated sesenduk (Endospermum diadenum) wood and correlations between these two ageing methods were established. For outdoor ageing samples were exposed to tropical weather for 1 3 and 6 months. For accelerated ageing cyclic boil“dry treatment involving 1 2 5 and 10 cycles were employed. Results revealed that density and weight loss were observed after the ageing treatments. After 6 months of outdoor ageing water absorption of aged phenol formaldehyde and phenol formaldehyde urea-treated samples increased from 3.0 to 13.3 and from 4.1 to 26.6 respectively. Similar behaviour was also observed for samples which underwent 10 cycles of accelerated ageing. Samples subjected to outdoor ageing had thickness swelling higher than that of accelerated ageing (4.3“4.5 vs 2.4“3.7). Most of the samples lost 8.3 to 22.4 of initial modulus of rupture after 1 month of outdoor ageing. Treated samples retained 61.7 to 77.1 of its initial modulus of elasticity after 10 cycles of accelerated ageing while the untreated samples retained only 48.7. Emission of formaldehyde decreased with increased exposure times and cyclic boil“dry cycles. As confirmed by Pearsons correlation test there were good correlations (r 0.71“0.99) for properties of samples between accelerated ageing and outdoor ageing.

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Item Type:	Article
AGROVOC Term:	Ageing
AGROVOC Term:	Laminated wood
AGROVOC Term:	Weather conditions
AGROVOC Term:	Fabrication
AGROVOC Term:	Wood density
AGROVOC Term:	Weight losses
AGROVOC Term:	Absorption
AGROVOC Term:	Formaldehyde
AGROVOC Term:	Thickness
AGROVOC Term:	Swelling
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	28 Apr 2025 03:24
URI:	http://webagris.upm.edu.my/id/eprint/23232

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