Physical properties of Oriental beech impregnated and coated with some chemicals

Toker, Hilmi; Altay, Çağlar; Baysal, Ergün; Bircan, İlknur Babahan; Peker, Hüseyin

doi:10.1590/0104-1428.20230033

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ORIGINAL ARTICLE • Polímeros 33 (3) • 2023 • https://doi.org/10.1590/0104-1428.20230033 copy

Physical properties of Oriental beech impregnated and coated with some chemicals

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

In this research, oven-dry density, air-dry density, and water absorption levels of Oriental beech treated with flame-resistant chemicals (FRC) and coated with polyurethane/polyure (PU) and epoxy (EP) were evaluated. According to ISO 3129 standard, the experimental specimens were made from Oriental beech wood. Wood specimens were subjected to 3% aqueous solutions of boric acid, borax, a boric acid and borax mixture (1:1; weight: weight), ammonium sulphate, and polyurethane/polyurethane, and epoxy resins before being coated with these substances. Results showed that oven-dry and air-density values of PU coated wood were much higher than EP coated wood. Water absorption (WA) levels of PU coated of wood were lower than EP coated wood. While FRC treated and PU coated wood resulted in lower WA levels than only PU coated wood, FRC treated and EP coated wood resulted in higher WA levels than only EP coated wood.

Keywords:
coating; epoxy resin; impregnation; polyurethane/polyure resin; physical properties

Specimens’ dimensions	Test types	Number of specimens
20 mm × 20 mm x 20 mm	Oven dry density	110
20 mm × 20 mm x 20 mm	Air-dry density	110
20 mm × 20 mm x 20 mm	Water absorption	110

Chemicals	Retention (kg/m³)	Oven-dry density values (g/cm³)	Standard deviation	Homogeneity group
Control	-	0.65	0.01	D
PU	-	1.21	0.10	B
BA+PU	16.88	1.30	0.13	A
BX+PU	15.74	1.27	0.07	AB
AS+PU	14.67	1.26	0.17	AB
(BA+BX)+PU	13.96	1.32	0.07	A
EP	-	0.76	0.03	C
BA+EP	16.21	0.72	0.15	CD
BX+EP	16.07	0.76	0.04	C
AS+ EP	14.87	0.74	0.07	CD
(BA+BX)+ EP	16.05	0.76	0.05	C

Chemicals	Retention (kg/m³)	Air-dry density values (g/cm³)	Standard deviation	Homogeneity group
Control	-	0.69	0.01	D
PU	-	1.22	0.10	B
BA+ PU	16.88	1.32	0.13	A
BX+ PU	15.74	1.28	0.07	AB
AS+ PU	14.67	1.27	0.17	AB
(BA+BX)+PU	13.96	1.34	0.07	A
EP	-	0.78	0.03	C
BA+EP	16.21	0.71	0.06	CD
BX+EP	16.07	0.77	0.03	CD
AS+EP	14.87	0.76	0.07	CD
(BA+BX)+EP	16.05	0.77	0.04	CD

Chemicals	Water absorption levels (%)
Chemicals	After 1 hour	H.G	After 8 hours	H.G	After 24 hours	H.G	After 72 hours	H.G	After 120 hours	H.G	After 168 hours	H.G	After 336 hours	H.G
Control	25.53	A	52.00	A	65.72	A	76.03	A	81.17	A	88.41	A	100.59	A
PU	0.90	B	3.11	C	4.40	D	8.96	E	9.95	E	13.06	F	19.66	F
BA+PU	1.14	B	2.18	C	3.72	D	8.17	E	9.63	E	11.07	F	15.29	FG
BX+PU	0.50	B	1.81	C	2.35	D	5.42	E	5.89	E	6.22	F	10.96	G
AS+PU	0.39	B	1.58	C	3.26	D	6.92	E	8.12	E	12.38	F	18.34	FG
(BA+BX) +PU	0.78	B	1.78	C	3.73	D	6.49	E	8.65	E	11.21	F	15.39	FG
EP	3.46	B	9.34	BC	18.53	C	32.09	D	35.19	D	39.48	E	48.36	E
BA+EP	5.50	B	16.29	B	25.55	BC	39.17	CD	43.17	CD	47.21	D	52.50	DE
BX+EP	4.51	B	11.82	B	31.19	B	47.36	B	49.18	B	56.96	BC	62.68	C
AS+EP	4.27	B	12.37	B	27.42	B	49.55	B	55.56	B	63.95	B	72.17	B
(BA+BX) +EP)	4.92	B	13.45	B	26.38	B	43.09	BC	47.46	BC	52.87	CD	73.07	B

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