International Journal of Adhesion and Adhesives最新文献

{"title":"Preheated composite resins versus luting cement: Degree of conversion, film thickness, color stability and bond strength to enamel and ceramic veneers","authors":"Carolina Carramilo Raposo ,&nbsp;Paulo Vitor Campos Ferreira ,&nbsp;Luanna Marinho Sereno Nery ,&nbsp;Bruno Martins Maciel ,&nbsp;Diego Machado Ardenghi ,&nbsp;José Bauer ,&nbsp;Darlon Martins Lima","doi":"10.1016/j.ijadhadh.2024.103895","DOIUrl":"10.1016/j.ijadhadh.2024.103895","url":null,"abstract":"<div><h3>Purpose</h3><div>The literature is scarce regarding the use of preheated composite resin for cementing dental ceramic veneers. The purpose of this study is to evaluate the effect of using preheated composite resins as cementing agents on the degree of conversion, film thickness, color stability and bond strength of dental ceramic veneers.</div></div><div><h3>Material and methods</h3><div>Three composite resins, Filtek Z100 (Z100), Opus Bulk Fill APS (Opus) and Viscalor Bulk (Viscalor) were preheated and compared with Opus Bulk Fill Flow APS (Opus Flow) and resin cement RelyX Veneer (RelyX). The properties of degree of conversion, film thickness, color stability and microshear bond strength were tested. Statistical analysis was performed using ANOVA and Holm-Sidak tests (α = 0.05).</div></div><div><h3>Results</h3><div>The Opus Flow showed a higher degree of conversion compared to Z100 and Viscalor (<em>P</em> &lt; 0.05), but similar to Opus and RelyX. The film thickness of all preheated resins was greater than the film thickness of the flow resin and the resin cement (<em>P</em> &lt; 0.001). In the enamel surface, the bond strength of Viscalor was superior to RelyX (<em>P</em> &lt; 0.001). In the ceramic surface, the bond strength of preheated resins was superior to the resin cement (<em>P</em> &lt; 0.05). Color stability was significantly influenced by the time factor (<em>P</em> &lt; 0.05), but there was no difference between the different materials (<em>P</em> &gt; 0.05). There was no difference between the storage time of 30 days and 6 months.</div></div><div><h3>Conclusions</h3><div>The preheated composite resins showed a degree of conversion and color stability similar to the resin cement, but its film thickness was greater than the resin cement and the flowable resin. Viscalor showed the highest bond strength to enamel.</div></div><div><h3>Clinical implications</h3><div>Although preheated resins present similar characteristics to resin cements and flowable composite resins, the film thickness of preheated composite resins is high, which can lead to failures in the adaptation of dental ceramic veneers or even the fracture of the dental ceramic veneer during its cementation.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"137 ","pages":"Article 103895"},"PeriodicalIF":3.2,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142748205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of a unique intra-orifice barrier on the sealability and optical properties of endodontically treated teeth: An in vitro study","authors":"Sumaya Basudan ,&nbsp;Rua Babaier ,&nbsp;Dema Alomran ,&nbsp;Sadeen Al-Harthi ,&nbsp;Latifah Al-Fihed ,&nbsp;Manar Al-Abdulkarim ,&nbsp;Nassr Al-Maflehi ,&nbsp;Nikolaos Silikas","doi":"10.1016/j.ijadhadh.2024.103891","DOIUrl":"10.1016/j.ijadhadh.2024.103891","url":null,"abstract":"","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"137 ","pages":"Article 103891"},"PeriodicalIF":3.2,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The effect of modified silica nanoparticles on the mechanical properties of UV-curable polyurethane acrylate adhesive","authors":"Farina Moghaddam,&nbsp;Abolfazl Tutunchi","doi":"10.1016/j.ijadhadh.2024.103899","DOIUrl":"10.1016/j.ijadhadh.2024.103899","url":null,"abstract":"<div><div>In this research, the effect of SiO₂ nanoparticles on the one-component urethane acrylate (UA) based ultraviolet (UV) curing adhesive bonds was studied. UV adhesives attracted attention due to their advantages such as fast curing, being colorless, and thin adhesive layer at the joint. However, one of the drawbacks associated with UV adhesives is their suboptimal mechanical properties. The aim of this work is to fabricate and characterize a nanocomposite adhesive by incorporating silica nanoparticles into the urethane acrylate adhesive. At first, fumed silica nanoparticles were modified by γ-Methacryloxypropyltrimethoxysilane (MPS) and γ-Aminopropyltriethoxysilane (APTES)@methyl acrylate (MA) via sol-gel process and Michael addition reaction then introduced to the urethane acrylate adhesive. A notable betterment was observed within the shear strength of adhesive joints. The morphological and structural characteristics of silica/UA, functionalized silica-MPS/UA, and functionalized silica-APTES@MA/UA nanocomposite adhesives were assessed by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). The successful dispersion of functionalized silica nanoparticles into the UA adhesive led to the foundation of hardy interfacial adhesion with UA by easing the formation of cross-linking networks between the nanoparticles and UA after UV polymerization that was proved in results. In addition, SEM micrographs show a transition of fracture morphology from smooth to rough surfaces upon the addition of nanoparticles. In addition, an increase in nanoparticle concentration caused a reduction in the contact angle. The shear strength of the 1.5 wt% pristine silica/UA, 1.5 wt% functionalized silica-MPS/UA, and 1 wt% functionalized silica-APTES@MA/UA adhesive composite were 59.37 %, 84.63 %, and 46.51 % increased respectively, as compared to neat UA adhesive.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"137 ","pages":"Article 103899"},"PeriodicalIF":3.2,"publicationDate":"2024-11-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Influence of the bonding method on interlaminar fracture toughness for composite material non-symmetric configurations","authors":"J. Cañas,&nbsp;J. Justo,&nbsp;A. Blázquez,&nbsp;M.L. Velasco","doi":"10.1016/j.ijadhadh.2024.103898","DOIUrl":"10.1016/j.ijadhadh.2024.103898","url":null,"abstract":"<div><div>The DCB test is the most widely used method to assess the quality of composite bonded joints. However, in non-symmetric configurations, experimental testing has shown that cracks can propagate cohesively, adhesively, or migrate, leading to varying fracture toughness values. This study examines the influence of bonding methods (co-curing and secondary bonding) on fracture toughness in non-symmetric joints with unidirectional composite laminates. To achieve this, both an experimental campaign and numerical analysis were conducted. It is obtained that, as long as the thinner adherent is previously cured and the thickness ratio between adherents is less than 75 %, crack migration will occur, reducing the value of the energy necessary to make the crack propagate. Cohesive failure resulted in fracture toughness values about 100 % higher than those of adhesive failure. This fact raises questions about the applicability of the fracture toughness obtained from the DCB test to joints in real structures, as the strength and stiffness of the joint depend not only on the adhesive but also on the adherents. Results from the meso-mechanical analysis and experimental data allow for defining a cohesive law for the adhesive joint, suitable for implementation in macro-mechanical models.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"137 ","pages":"Article 103898"},"PeriodicalIF":3.2,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142722117","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A double-layered optically clear adhesive with enhanced resistance to waviness and impact, designed for use in high-end mobile display","authors":"Intae Son,&nbsp;Dasong Lee,&nbsp;Jueyoun Park,&nbsp;Won Seok Kim,&nbsp;Kang Woo Lee","doi":"10.1016/j.ijadhadh.2024.103897","DOIUrl":"10.1016/j.ijadhadh.2024.103897","url":null,"abstract":"<div><div>In high-tech display industries, excellent impact resistance and surface waviness implementation technologies have gained much attention as the products are being lightweight and thinned. In particular, as a black pixel defining layer is adopted instead of a polarizer used to prevent external light reflection, impact resistance performance and surface quality characteristics are problematic. Herein, we proposed the double-layered optically clear adhesive (OCA) structure consisting of urethane-acrylate type OCA and UV-curable acrylic OCA for simultaneously achieving impact resistance and surface quality performances. Urethane simultaneously contains the soft segment and the hard segment based on hydrogen bonding between urethane functional groups, indicating high shock absorption performance. In addition, due to this unique structure, it exhibited a high modulus in the compression direction, thereby realizing excellent surface waviness. The UV-curable acrylate OCA can implement basic properties of adhesives such as tacky, adhesion, and inkstep cover capability, while at the same time securing indentation resistance with high modulus after UV curing. Optimization of impact resistance performance and surface waviness according to the thickness and laminating order of the proposed double-layered OCA was performed, and as a result, the double-layered OCA in panel/urethane-acrylate type OCA 100 μm/UV-curable acrylic OCA 25 μm/window structure showed the improved surface quality of 0.22 Kc value improved by 56.8 % and impact resistance of 5.1 cm improved by 100 % compared to the conventional OCA.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"137 ","pages":"Article 103897"},"PeriodicalIF":3.2,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706116","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of radiation therapy regimen on the dislodgement resistance of endodontic sealers: A micro push-out test","authors":"Marcos Testa Magoga ,&nbsp;Rafaela Lourdes de Sousa ,&nbsp;Luiz Carlos Lima Dias-Junior ,&nbsp;Rayssa Sabino-Silva ,&nbsp;Mariana Comparotto Minamisako ,&nbsp;Paulo Marcelo Rodrigues ,&nbsp;Vicente Ribeiro Netto ,&nbsp;Ricardo Machado ,&nbsp;Cleonice da Silveira Teixeira ,&nbsp;Lucas da Fonseca Roberti Garcia","doi":"10.1016/j.ijadhadh.2024.103894","DOIUrl":"10.1016/j.ijadhadh.2024.103894","url":null,"abstract":"<div><h3>Purpose</h3><div>This study aimed to assess the impact of the radiation therapy regimen on the dislodgement resistance of endodontic sealers of different bases through a micro push-out test.</div></div><div><h3>Materials and methods</h3><div>Dentin slices were obtained from the cervical and middle root thirds of bovine incisors and distributed into three groups, according to the radiation therapy regimen (<em>n</em> = 30): non-irradiated; 50 Gy; and 70 Gy. Three 1.0 mm diameter root canal-like cavities were made in each dentin slice. Each cavity was filled with the following sealers: AH Plus Jet (epoxy resin), BioRoot RCS (bioceramic) and Endofill (zinc oxide). After 7 days, a micro push-out test was performed in a Universal Testing Machine. Failures were analyzed using a stereomicroscope. Statistical analysis included the application of Three-Way Analysis of Variance (ANOVA) followed by Bonferroni's post-hoc test (<em>α</em> = 5 %).</div></div><div><h3>Results</h3><div>Non-irradiated specimens filled with AH Plus Jet and BioRoot RCS had higher bond strength than the irradiated ones, regardless of the radiation therapy regimen (p &lt; 0.001). There were no differences between specimens irradiated with 50 Gy and 70 Gy for AH Plus Jet and BioRoot RCS (p &gt; 0.05). There were no differences among non-irradiated and irradiated specimens for Endofill at the cervical third (p = 0.406). Cohesive failure was the most frequent before irradiation. After irradiation, mixed failure was the most frequent.</div></div><div><h3>Conclusion</h3><div>Radiation therapy reduced the bond strength of both epoxy resin and bioceramic sealers. The zinc oxide-based sealer exhibited the lowest dislodgement resistance, making it a less suitable option for patients undergoing radiotherapy.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103894"},"PeriodicalIF":3.2,"publicationDate":"2024-11-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706192","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effect of deproteinization with calcium hypochlorite on bond strength and hybrid layer formation of universal adhesives systems to eroded dentin","authors":"Gabriela Mariana Castro-Núñez ,&nbsp;Aslhey Luz Alzamora-Perez ,&nbsp;Maria Alejandra Gavidia-Herrera ,&nbsp;Ana Lourdes Machaca-Apaza ,&nbsp;Dannittsa Sibell Vargas-Cotacallapa ,&nbsp;João Felipe Besegato ,&nbsp;Milton Carlos Kuga ,&nbsp;Wilfredo Gustavo Escalante-Otárola","doi":"10.1016/j.ijadhadh.2024.103892","DOIUrl":"10.1016/j.ijadhadh.2024.103892","url":null,"abstract":"<div><h3>Purpose</h3><div>To evaluate the microtensile bond strength and hybrid layer formation of universal adhesive systems applied to eroded dentin deproteinized with calcium hypochlorite.</div></div><div><h3>Material and methods</h3><div>Two hundred bovine teeth were sectioned, preconditioned with acid, and exposed to a 15-day acid and abrasive challenge. Specimens were divided into five groups (n = 40): deproteinization with calcium hypochlorite at 1 %, 2.5 %, and 5 % concentrations, and two controls (distilled water or 2.5 % sodium hypochlorite). Each group of 20 specimens was treated with either Solare Universal Bond or Scotchbond Universal adhesive systems and light-cured with LED. Bond strength was tested using microtensile tests. Adhesive interfaces were analyzed for failure modes and hybrid layer formation using scanning electron microscopy, and EDX analysis was used to determine elemental composition.</div></div><div><h3>Results</h3><div>Calcium hypochlorite (1 % and 2.5 %) significantly improved bond strength with both adhesives compared to controls (p &lt; 0.05). Solare Universal Bond showed mainly adhesive fractures, while Scotchbond Universal had more mixed fractures. The 1 % and 2.5 % calcium hypochlorite treatments enhanced hybrid layer extension with Solare Universal Bond (p &lt; 0.05), and matched distilled water with Scotchbond Universal (p &lt; 0.05). Sodium hypochlorite resulted in a thinner hybrid layer (p &lt; 0.05). EDX analysis showed a decrease in Silicon with higher deproteinization concentrations.</div></div><div><h3>Conclusion</h3><div>The bonding effects of deproteinizing eroded dentin with calcium hypochlorite depend on the concentration and adhesive system used. Deproteinization with 5 % calcium hypochlorite improved both bond strength and hybrid layer formation for Solare Universal Bond, while 1 % and 2.5 % concentrations enhanced bond strength for Scotchbond Universal without impacting hybrid layer thickness, which did not adversely affect bond strength.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103892"},"PeriodicalIF":3.2,"publicationDate":"2024-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706191","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Multi-layer continuum model for adhesive FM 300-2 in end-notched flexure carbon laminate","authors":"O. Rodera,&nbsp;N. Pournoori,&nbsp;P. Hakala,&nbsp;M. Kanerva,&nbsp;J. Jokinen","doi":"10.1016/j.ijadhadh.2024.103884","DOIUrl":"10.1016/j.ijadhadh.2024.103884","url":null,"abstract":"<div><div>The current investigation analyses the un-stable crack initiation of an adhesively bonded End Notched Flexure (ENF) specimen by means of a continuum damage formulation, based on the Bazant’s crack model, to reproduce accurately the load response and the fracture process zone of the adhesive. The specimen consisted of carbon fibre reinforced polymer adherends and two sheets of FM 300-2 adhesive films. The need of this implementation arose from experimental observations of normal transverse damage mechanisms at the bondline during the crack initiation. The damage model was based on a multi-layer configuration of the adhesive meso-structure that accounted for two damage activation functions in the normal and shear transverse directions. The results demonstrated the capability of the model to predict closely the force drop in the load–displacement curve of the ENF test. Different multi-layer configurations were studied following proper meso-structure simplification of the adhesive to use elastic and damage-capable layers in a correct order and thicknesses. The rise of the modelled shear strength allowed for keeping enough stored strain energy contributed to the low triaxiality stress in the bondline. Finally, the results demonstrated a significant influence of the layers modelling the knitted carrier to the local mechanisms of tensile fracture because of the normal transverse deformations. Unclassified. Based on Foreground information under EDA Contract No B.PRJ.RT.670 covering the Ad Hoc Project entitled “PATCHBOND II”.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"137 ","pages":"Article 103884"},"PeriodicalIF":3.2,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142705064","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A comprehensive review of the utilization of alternative binding properties in the construction of asphalt pavements","authors":"Rashida Ferdaus,&nbsp;Khairil Azman Masri,&nbsp;Kamrul Hasan,&nbsp;Ramadhansyah Putra Jaya","doi":"10.1016/j.ijadhadh.2024.103893","DOIUrl":"10.1016/j.ijadhadh.2024.103893","url":null,"abstract":"<div><div>Asphalt pavement construction has traditionally relied on conventional binders; however, growing concerns over environmental sustainability and performance have catalyzed a shift towards exploring alternative binders. This paper presents a thorough review of the burgeoning impact of alternative binders in asphalt pavement construction. Investigated alternative binder properties include polymers, waste cooking oil (WCO), waste engine oil (WEO), resin, and others, all of which show promise as modified asphalt binders. The review underscores the potential of alternative binders to transform asphalt pavement construction, offering sustainable, cost-effective, and high-performance solutions. Benefits include reduced reliance on fossil fuels, enhanced durability, improved rutting resistance, and a diminished environmental footprint. Moreover, the paper emphasizes the necessity for ongoing research and collaboration among researchers, practitioners, and policymakers to fully relalize the advantages of alternative binder properties in fostering greener and more resilient transportation infrastructure. This research signals a pivotal shift towards environmentally conscious practices in pavement construction, focusing on sustainable solutions to meet contemporary infrastructure demands while minimizing ecological impacts.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"137 ","pages":"Article 103893"},"PeriodicalIF":3.2,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706115","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Synthesis, characterisation, and thermal degradation kinetics of lignin-based polyurethane wood adhesives","authors":"Fabio Hernández-Ramos ,&nbsp;Bruno Esteves ,&nbsp;Luísa Carvalho ,&nbsp;Jalel Labidi ,&nbsp;Xabier Erdocia","doi":"10.1016/j.ijadhadh.2024.103889","DOIUrl":"10.1016/j.ijadhadh.2024.103889","url":null,"abstract":"<div><div>Polyurethane adhesives are widely employed in a range of industrial applications due to their exceptional bonding strength, flexibility, and chemical resistance. These materials play a crucial role in wood bonding technologies, where their versatility and durability make them ideal for creating strong, long-lasting joints. In this work, Four different polyurethane wood adhesives were synthesised using ligno-based bio-polyols obtained through microwave assisted liquefaction reaction of two wood species (hardwood and softwood) using polyethylene glycol and glycerol as solvents. The reaction conditions used for the synthesis of bio-polyols were optimised in a previous work. The synthesis of polyurethanes was carried out by one-shot method using Tetrahydrofuran (THF) as solvent and MDI as diisocyanate employing different NCO:OH ratios (2.0:1, 2.5:1, and 3.0:1). The chemical structure of polyurethanes was determined through ATR-FTIR and the shear strength was analysed using Automated Bonding Evaluation System (ABES) employing beech veneer strips. Through ABES it was concluded that an NCO:OH ratio of 2.5:1 was the formulation that showed the best shear strength for a pressing time of 120 s. Employing this ratio and the same synthesis procedure, two new polyurethanes were synthesised with the bio-polyols obtained using crude glycerol instead commercial glycerol. Finally, a study of thermal degradation kinetics employing the Ozawa–Flynn–Wall (OFW) and Kissinger–Akahira–Sunose (KAS) isoconversional methods of the polyurethanes synthesised with an NCO:OH ratio of 2.5:1 was carried out. On the one hand, the E_a of each system were estimated for the different α ratios, obtaining slightly higher values for the adhesives produced using commercial glycerol than crude glycerol. In addition, the pre-exponential factor was determined, enabling an estimation of the lifetime of the polymers. This study highlights demonstrated that crude glycerol could replace commercial glycerol without compromising adhesive properties. The findings revealed that the lignin source significantly influences the adhesive's characteristics and stability, while addressing challenges in achieving industrial viability remains essential for broader application.</div></div>","PeriodicalId":13732,"journal":{"name":"International Journal of Adhesion and Adhesives","volume":"136 ","pages":"Article 103889"},"PeriodicalIF":3.2,"publicationDate":"2024-11-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142706193","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}