Hydrothermal aging of one-component polyurethane adhesive filled with milled carbon fibres in the form of thin films and wood bondline

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26310%2F26%3A0198397" target="_blank" >RIV/00216305:26310/26:0198397 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.tandfonline.com/doi/full/10.1080/17480272.2025.2539411" target="_blank" >https://www.tandfonline.com/doi/full/10.1080/17480272.2025.2539411</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1080/17480272.2025.2539411" target="_blank" >10.1080/17480272.2025.2539411</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Hydrothermal aging of one-component polyurethane adhesive filled with milled carbon fibres in the form of thin films and wood bondline

Popis výsledku v původním jazyce

The deterioration of the properties of wood-glued joints exposed to different environments with variable parameters, such as humidity and temperature, is caused by structural changes. The aim of this study was to evaluate the influence of cold (A3) and boiling (A5) water on the structure of a commercial-type one-component polyurethane adhesive filled with milled carbon fibers (MCF) in the form of thin films and wood bondline. The structure and stiffness of the films, neat and filled with 1, 3, 5, and 7% MCF, was studied by Attenuated Total Reflectance Infrared Spectroscopy (ATR), Temperature-Modulated Differential Scanning Calorimetry, Wide-Angle X-ray Scattering, and Dynamic Mechanical Analysis. The adhesive structure of the wood bondline (neat and filled with 5% MCF) was measured on the shear fracture surfaces of beech-glued joints using ATR. The adhesive structure was a mixed phase and largely amorphous. The adhesive was not cured completely in either thin films or wood bondline. After A3, slight post-curing of adhesive occurred. Hard domains of adhesive were degraded after A5 and dissociated structure improved the adhesive film stiffness above 70°C. Compared with the films, the bondline structure differed in a higher degree of original curing and a much lower degree of degradation after A5.

Název v anglickém jazyce

Hydrothermal aging of one-component polyurethane adhesive filled with milled carbon fibres in the form of thin films and wood bondline

Popis výsledku anglicky

The deterioration of the properties of wood-glued joints exposed to different environments with variable parameters, such as humidity and temperature, is caused by structural changes. The aim of this study was to evaluate the influence of cold (A3) and boiling (A5) water on the structure of a commercial-type one-component polyurethane adhesive filled with milled carbon fibers (MCF) in the form of thin films and wood bondline. The structure and stiffness of the films, neat and filled with 1, 3, 5, and 7% MCF, was studied by Attenuated Total Reflectance Infrared Spectroscopy (ATR), Temperature-Modulated Differential Scanning Calorimetry, Wide-Angle X-ray Scattering, and Dynamic Mechanical Analysis. The adhesive structure of the wood bondline (neat and filled with 5% MCF) was measured on the shear fracture surfaces of beech-glued joints using ATR. The adhesive structure was a mixed phase and largely amorphous. The adhesive was not cured completely in either thin films or wood bondline. After A3, slight post-curing of adhesive occurred. Hard domains of adhesive were degraded after A5 and dissociated structure improved the adhesive film stiffness above 70°C. Compared with the films, the bondline structure differed in a higher degree of original curing and a much lower degree of degradation after A5.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

—

Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Wood material science & engineering

ISSN

1748-0272

e-ISSN

1748-0280

Svazek periodika

—

Číslo periodika v rámci svazku

01.08.2025

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

1-14

Kód UT WoS článku

001541804800001

EID výsledku v databázi Scopus

2-s2.0-105012427339