Evaluation of wet tensile shear strength and surface properties of finger-jointed acetylated beech (Fagus sylvatica L.) laminated veneer lumber. Slabohm, M., Stolze, H., & Militz, H. European Journal of Wood and Wood Products, 0(0):9, June, 2023.
Paper doi abstract bibtex Abstract Experiments on finger-jointing acetylated beech ( Fagus sylvatica L.) laminated veneer lumber (LVL) have been made. The specimens were examined on its wet tensile shear strength (TSS) using three adhesives, including phenol resorcinol formaldehyde (PRF), one-component polyurethane (PUR) (without primer), and melamine urea formaldehyde (MUF). Contact angles (CA) of uncured and drop-applied MUF, PRF, and PUR adhesives on freshly cut finger-joints were evaluated. Surface roughness was measured using a laser-scanning-microscope (LSM). Results showed that PRF bonded acetylated specimens had highest wet TSS, followed by specimens with PUR bonding. MUF performed poorly, which was most likely caused by its inadequate water resistance and changes in chemical reactions due to remaining acetic acid. Acetylated finger-joints had a topography similar to untreated joints. Moreover, CA were just barely lower for MUF and PRF on acetylated wood than on untreated references.
@article{slabohm_evaluation_2023,
title = {Evaluation of wet tensile shear strength and surface properties of finger-jointed acetylated beech ({Fagus} sylvatica {L}.) laminated veneer lumber},
volume = {0},
issn = {0018-3768, 1436-736X},
url = {https://link.springer.com/10.1007/s00107-023-01970-3},
doi = {10.1007/s00107-023-01970-3},
abstract = {Abstract
Experiments on finger-jointing acetylated beech (
Fagus sylvatica
L.) laminated veneer lumber (LVL) have been made. The specimens were examined on its wet tensile shear strength (TSS) using three adhesives, including phenol resorcinol formaldehyde (PRF), one-component polyurethane (PUR) (without primer), and melamine urea formaldehyde (MUF). Contact angles (CA) of uncured and drop-applied MUF, PRF, and PUR adhesives on freshly cut finger-joints were evaluated. Surface roughness was measured using a laser-scanning-microscope (LSM). Results showed that PRF bonded acetylated specimens had highest wet TSS, followed by specimens with PUR bonding. MUF performed poorly, which was most likely caused by its inadequate water resistance and changes in chemical reactions due to remaining acetic acid. Acetylated finger-joints had a topography similar to untreated joints. Moreover, CA were just barely lower for MUF and PRF on acetylated wood than on untreated references.},
language = {en},
number = {0},
urldate = {2023-06-26},
journal = {European Journal of Wood and Wood Products},
author = {Slabohm, Maik and Stolze, Hannes and Militz, Holger},
month = jun,
year = {2023},
pages = {9},
file = {Slabohm et al. - 2023 - Evaluation of wet tensile shear strength and surfa.pdf:C\:\\Users\\Eva\\Zotero\\storage\\BRR5ZSPB\\Slabohm et al. - 2023 - Evaluation of wet tensile shear strength and surfa.pdf:application/pdf},
}
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Contact angles (CA) of uncured and drop-applied MUF, PRF, and PUR adhesives on freshly cut finger-joints were evaluated. Surface roughness was measured using a laser-scanning-microscope (LSM). Results showed that PRF bonded acetylated specimens had highest wet TSS, followed by specimens with PUR bonding. MUF performed poorly, which was most likely caused by its inadequate water resistance and changes in chemical reactions due to remaining acetic acid. Acetylated finger-joints had a topography similar to untreated joints. 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The specimens were examined on its wet tensile shear strength (TSS) using three adhesives, including phenol resorcinol formaldehyde (PRF), one-component polyurethane (PUR) (without primer), and melamine urea formaldehyde (MUF). Contact angles (CA) of uncured and drop-applied MUF, PRF, and PUR adhesives on freshly cut finger-joints were evaluated. Surface roughness was measured using a laser-scanning-microscope (LSM). Results showed that PRF bonded acetylated specimens had highest wet TSS, followed by specimens with PUR bonding. MUF performed poorly, which was most likely caused by its inadequate water resistance and changes in chemical reactions due to remaining acetic acid. Acetylated finger-joints had a topography similar to untreated joints. 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