Bonding performance of melamine-urea–formaldehyde and phenol-resorcinol–formaldehyde adhesive glulams at elevated temperatures

Liu, Jian; Yue, Kong; Xu, Liqin; Wu, Jianpeng; Chen, Zhangjing; Wang, Lu; Liu, Weiqing; Lu, Weidong

doi:10.1016/j.ijadhadh.2019.102500

Cited by 56 publications

(18 citation statements)

References 19 publications

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“…This might be due to the occurrence of gelation during the analysis. At high frequency zone, G' of resin with CMCR was higher than the one with flour, indicating a better filler-reinforcing effect [24].…”

Section: Effect On the Viscosity And Viscoelastic Propertiesmentioning

confidence: 89%

“…Previously, Zhang et al reported that water-soluble carboxymethyl cellulose could significantly improve the initial viscosity, interface compatibility, and bond strength of starch adhesives [23]. Obviously, the incorporation of carboxylic acid was beneficial to the dispersion of cellulose in adhesives due to the electrostatic repulsion interaction [24]. Although cellulose fiber could be further separated from CR to prepare cellulose derivatives, this process increased the cost, and was also time-consuming.…”

Section: Introductionmentioning

confidence: 99%

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Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

et al. 2020

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In this study, corncob residue (CR) valorization was simply and efficiently realized via carboxymethylation, and its enhanced performance as fillers in urea-formaldehyde (UF) resin was investigated. The structures of corncob residue and carboxymethylated derivative were analyzed by nuclear magnetic resonance (NMR), Fourier-transform infrared spectroscopy (FTIR), and Raman techniques, respectively. The thermal stability, morphology, viscosity control, and adhesive strength were then investigated to evaluate its performance as fillers in UF resin composite. Similar to commercial flour, carboxymethylated CR could effectively disperse in UF resin. It also exhibited a better initial viscosity control between 30 and 50 °C. The adhesive test analysis showed that the shear strength of resin with carboxymethylated CR addition could reach 1.04 MPa, which was comparable to flour (0.99 MPa) and significantly higher than raw CR (0.45 MPa). Moreover, a low formaldehyde emission was observed.

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Section: Effect On the Viscosity And Viscoelastic Propertiesmentioning

confidence: 89%

Section: Introductionmentioning

confidence: 99%

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

et al. 2020

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“…Many researches point out that the addition of urea not only contributes to reduced economic costs of the FF adhesive, but also improves the curing and the bond strength of the blades (Tomita and Hse 1998;Fan et al 2011). However, its use is not indicated for outdoor applications due to its low resistance to moisture (Liu et al 2020). On the other hand, phenol-formaldehyde adhesives present high resistance to humidity, resistance to weathering, and good resistance in the glue line.…”

Section: Introductionmentioning

confidence: 99%

Influence of different sheet compositions and commercial adhesives on the performance of multilaminated plywood

Setter

Zidanes

Miranda

et al. 2021

Preprint

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The quality of plywood panels depends on factors such as the forest species and the adhesive used in their production, and understanding the interferences of these factors in the final properties of the plywood is of fundamental importance. The study aimed to develop multilaminate plywood panels with two forest species and two types of adhesive and to evaluate the influences of these factors (forest species and adhesive) on the physical and mechanical properties of the plywood. The panels were produced with sheets of parica and pine with two types of adhesives, urea-formaldehyde and phenol-formaldehyde, with a weight of 150 g/cm². Then, each set was pressed for 10 minutes under a specific pressure of 0.98 MPa at a temperature of 150 °C. Three panels were produced for each type of blade and adhesive, totaling four treatments. The plywood was evaluated for physical properties (humidity, bulk density, and water absorption) and mechanical properties (parallel and perpendicular static flexion and resistance to mechanical shear). The results showed that the forest species had a greater influence on physical and mechanical properties, with the best results being observed for plywood produced with pine. The panels with sheets of parica and phenol-formaldehyde adhesive showed less moisture. The apparent density of the panels should be considered as it positively influenced the mechanical properties and negatively impacted water absorption. It is concluded that the plywood produced can be used for internal and external applications. However, it is indicated for structural purposes as it did not meet the requirements of the NBR 31.000.001/2:2001.

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“…The main subjects of study now are the strength of industrial and engineering structures made of glulam [1,2] and detailed comparison of bonding performance of adhesive glulams [3]. Much study is devoted to glulam conditions in wet environment because this kind of environment is usually very harmful or even fatal for timber structures [4].…”

Section: Introductionmentioning

confidence: 99%

Aesthetic, functional and physical features of glulam in building architecture

Zhuravlev

Журавлева

2020

E3S Web Conf.

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The main purpose of this research is to prove the efficiency of glulam to meet various architectural needs. The three features of glulam such as: plasticity and aesthetic value, functional efficiency, supporting properties and resistance to extreme conditions, are compared with the same features of concrete and steel, the most widely used materials nowadays. The methods are based upon actual test results and practical experience in creating glulam constructions. The research shows that plasticity of glulam allows to create complex curved surfaces and its surface and texture clearly demonstrate the unique aesthetic features of the elements made of this material. Glulam can also be efficiently used to create various space morphotypes such as compact rooms, linear vertical and horizontal space, hall space, space with a complex spatial configuration. It is also proved that glulam strength expressed in Constructive Quality Ratio (CQR) surpasses steel and concrete in supporting ability and its durability also exceeds steel structures durability and is comparable to concrete.

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Bonding performance of melamine-urea–formaldehyde and phenol-resorcinol–formaldehyde adhesive glulams at elevated temperatures

Cited by 56 publications

References 19 publications

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

Structures, Properties and Potential Applications of Corncob Residue Modified by Carboxymethylation

Influence of different sheet compositions and commercial adhesives on the performance of multilaminated plywood

Aesthetic, functional and physical features of glulam in building architecture

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