scholarly journals Saccaharum Cilliare Fiber Reinforced Polymer Composites

2008 ◽  
Vol 5 (4) ◽  
pp. 782-791 ◽  
Author(s):  
A. S. Singha ◽  
Vijay Kumar Thakur
Keyword(s):  
Mechanical Properties ◽  
Urea Formaldehyde ◽  
Thermal Studies ◽  
Natural Fibers ◽  
Fiber Reinforcement ◽  
Short Fiber ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Fiber Reinforced ◽  
Fiber Reinforced Materials

Renewable resources such as natural fibers in the field of fiber reinforced materials with their new range of applications represent an important basis in order to fulfill the ecological objective of creating eco-friendly materials. In views of enormous advantages a study on green composites usingSaccaharum cilliarefiber as a reinforcing material and urea-formaldehyde (UF) as a novel matrix has been made. First of all urea-formaldehyde resin synthesized was reinforced withSaccaharum cilliarefiber. Reinforcement of the fiber was accomplished in three different forms particle (200 micron) reinforcement, short fiber (3 mm.) reinforcement and long fiber (6 mm) reinforcement. Present work reveals that mechanical properties such as: tensile strength, compressive strength and wear resistance of urea -formaldehyde resin (UF) increases to a significant extent when reinforced withSaccaharum cilliarefiber which is found in outsized amount in the Himalayan Region. These mechanical properties mainly depend upon the dimensions of the fiber used. Analysis of results shows that particle reinforcement is more effective as compared to short and long fiber reinforcement. Morphological and thermal studies of these composites have also been carried out.

scholarly journals Study of Mechanical Properties of Waste Biomass Reinforced Urea-Resorcinol-Formaldehyde Composites

2011 ◽  
Vol 8 (4) ◽  
pp. 1478-1489 ◽  
Author(s):  
A. S. SINGHA ◽  
B. S. Kaith ◽  
Inderjeet Kaur ◽  
Ashwarya Jyoti Khanna
Keyword(s):  
Mechanical Properties ◽  
Mechanical Behavior ◽  
Urea Formaldehyde ◽  
Thermal Studies ◽  
Natural Fibers ◽  
Pine Needles ◽  
Formaldehyde Resin ◽  
Waste Biomass ◽  
Resorcinol Formaldehyde ◽  
High Performing

Natural fibers play an important role in developing high performing fully biodegradable composites which will be a key material to solve the current ecological and environmental problems. Due to enormous advantages of composites reinforced with natural fibers, a study on pine needles reinforced urea-resorcinol-formaldehyde composites has been made. Present investigation has revealed that urea-formaldehyde resin in 1.0: 2.5 ratio exhibits optimum mechanical behavior whereas in case urea-resorcinol- formaldehyde resin, the best mechanical behavior was shown by 1.0: 1.0: 2.5 ratios. However, reinforcing of this resin with pine-needles of 1 cm size and evaluation of their mechanical properties showed that mechanical properties increase with reinforcement. These results were further supported by theSEMand thermal studies.

Improving the Thickness-Swelling (TS) of Castor-Stalk Based Panel

2011 ◽  
Vol 183-185 ◽  
pp. 2095-2099
Author(s):  
Xiao Ping Li ◽  
Ding Guo Zhou ◽  
Si Qun Wang
Keyword(s):  
Mechanical Properties ◽  
Castor Oil ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
People’S Republic Of China ◽  
Formaldehyde Resin ◽  
People's Republic Of China ◽  
Thickness Swelling ◽  
Republic Of China

Castor-oil stalk is one kind of excellent woody materials, and the thickness swelling ( TS ) of the castor-oil stalk based panel with Urea- formaldehyde resin ( UF ) cannot meet the requirement of the Standard of People’s Republic of China. the TS of the panel was improved with wax emulsion.Results showed that the mechanical properties and the TS of the particle panels were improved as the wax emulsion loading increased. The TS of castor stalk based particle boards and fiber boards can meet the requirement of standard of PRC when 1.44 and 1.2 wt% wax emulsion, respectively, was added.

scholarly journals Grewia optivaFiber Reinforced Novel, Low Cost Polymer Composites

2009 ◽  
Vol 6 (1) ◽  
pp. 71-76 ◽  
Author(s):  
A. S. Singha ◽  
Vijay Kumar Thakur
Keyword(s):  
Polymer Composites ◽  
Low Cost ◽  
Urea Formaldehyde ◽  
Thermal Studies ◽  
Fiber Reinforcement ◽  
Formaldehyde Resin ◽  
Fiber Analysis ◽  
The Matrix ◽  
Grewia Optiva ◽  
Analysis Of Results

In this research article, the assessment of properties of compression moldedGrewia optivafiber reinforced Urea-Formaldehyde (UF) matrix based polymer composites is reported. Reinforcing of the UF resin withGrewia optivafiber was accomplished in the particle, short and long fiber reinforcement. Present work reveals that mechanical properties such as: tensile strength, compressive strength and wear resistance of urea - formaldehyde resin increases to a significant extent when reinforced withGrewia optivafiber. Analysis of results shows that particle reinforcement is more effective as compared to short and long fiber reinforcement. Morphological and Thermal studies of the matrix and fibre reinforced biocomposites have also been carried out

STUDY OF THE INFLUENCE OF STABILIZERS ON THE PROPERTIES OF CARBAMIDE FOR-MALDEHYDE BINDER AND FC PLYWOOD

2020 ◽  
Vol 10 (1) ◽  
pp. 136-143
Author(s):  
A. Fedotov ◽  
Tat'yana Vahnina ◽  
Andrey Titunin ◽  
Aleksandr Sviridov
Keyword(s):  
Mechanical Properties ◽  
Bending Strength ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Strength Reduction ◽  
Cohesive Strength ◽  
Urea Formaldehyde Resin ◽  
Strength Characteristics ◽  
Formaldehyde Resin ◽  
Glycerol Mono

The problem of stabilizing the properties of the urea-formaldehyde binder during storage is relevant for both glued products and resins. Changing the performance of the resin during storage makes it difficult to apply a binder and leads to a deterioration in the physical and mechanical properties of plywood. The effect of glycerol, mono- and triethanolamine, as well as a mixture of glycerol and monoethanolamine on the nominal viscosity of the resin after 56 days of storage, has been studied. The use of glycerol and monoethanolamine (including in the complex) reduces the nominal viscosity of the resin by 13.5-24.8%. The use of triethanolamine as a stabilizer makes it possible to reduce the nominal viscosity by 35% in comparison with the index of an unstabilized oligomer. Mechanical properties of FC plywood based on the stabilized and unstabilized binder has been studied. It was found that glycerol additive (or glycerol in combination with monoethanolamine) significantly reduces strength characteristics of plywood, which makes it irrational to use these stabilizers. The addition of 0.2% triethanolamine to CFS allows a 35% reduction in the nominal viscosity of the resin, while the cohesive strength of the binder decreases by 1.5%. The result is within the framework of the dispersion of the indicator, i.e. strength reduction is negligible. The static bending strength of plywood with a stabilized triethanolamine binder is more important than that of control specimens without the addition of stabilizers. The results of the study enable to recommend the addition of triethanolamine in an amount of 0.2% by weight of urea-formaldehyde resin as a rational stabilizer

scholarly journals AVALIAÇÃO DO POTENCIAL DE USO DE ESPÉCIES DE PÍNUS TROPICAIS E EUCALIPTO NA PRODUÇÃO DE PAINÉIS COMPENSADOS UREICOS

FLORESTA ◽  
2012 ◽  
Vol 42 (2) ◽  
pp. 277 ◽  
Author(s):  
Setsuo Iwakiri ◽  
Felipe Gustavo Sanches ◽  
Daniele Cristina Potulski ◽  
Janice Bernardo Silva ◽  
Mário De Andrade ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Pinus Taeda ◽  
Urea Formaldehyde ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Eucalyptus Species ◽  
Pressing Time ◽  
Potential Use

Esta pesquisa teve como objetivo avaliar a qualidade dos painéis compensados multilaminados produzidos a partir de lâminas de madeira de cinco espécies de pínus tropicais e nove espécies de eucalipto. Foram produzidos em laboratório painéis compensados com cinco lâminas de 2,0 mm de espessura, coladas com resina ureia-formaldeído (UF), com gramatura de 360 g/m². Os painéis foram prensados com pressão específica de 10 kgf/cm², temperatura de 110 ºC e tempo de prensagem de 7 min. Foram avaliadas as propriedades de resistência da linha de cola aos esforços de cisalhamento (RLC), teste seco e úmido e flexão estática (MOE e MOR) paralela e perpendicular. Entre as espécies de pínus tropicais, o P. oocarpa e P. tecunumannii foram as que apresentaram melhor desempenho. Já para as espécies de eucalipto, os melhores resultados foram obtidos para E. saligna, E. viminalis e E. dunnii. Todas as espécies de pínus tropicais e de eucalipto avaliadas neste estudo apresentaram resultados de propriedades mecânicas estatisticamente iguais ou superiores em relação à espécie referencial – Pinus taeda. Os resultados obtidos indicam a viabilidade de uso de lâminas dessas espécies para fabricação de painéis compensados para uso interior.Palavras-chave: Lâminas de madeira; compensados; pínus tropicais; eucalipto. AbstractEvaluation of potential use of species of tropical pine and eucalyptus for UF plywood manufacture. This research was developed in order to evaluate the quality of plywood manufactured from veneers of five species of tropical pine and nine species of eucalyptus. The plywood was manufactured with five veneers of 2.0 mm thickness, using urea-formaldehyde resin with amount of glue spread of 360 g/m². The boards were pressed at pressure of 10 kgf/cm², temperatures of 110 ºC and pressing time of 8 minutes. It was evaluated the properties of glue line shear strength (RLC) and static bending (MOE and MOR), parallel and perpendicular. Among tropical pine species, P. oocarpa and P. tecunumannii presented the best results in relation to mechanical properties of the boards. For the eucalyptus species  best results were obtained by E. saligna, E. viminalis and E. dunnii. All the  tropical pine and eucalyptus species evaluated in this research presented boards mechanical properties statistically equal or greater when compared to referential species - Pinus taeda. The results revealed the feasible use of such species veneers for plywood manufactures to internal applications.Keywords: Veneers; plywood; tropical pine; eucalyptus.

Influence of Shungite Modificator on Technological Properties of Polymeric Glue Based on Urea-Formaldehyde Resin

2020 ◽  
Vol 992 ◽  
pp. 434-438
Author(s):  
Nikolai Gennadievich Panov ◽  
Sergey Borisovich Vasilyev ◽  
Gennady Nikolaevich Kolesnikov
Keyword(s):  
Mechanical Properties ◽  
Urea Formaldehyde ◽  
Wood Particle ◽  
Urea Formaldehyde Resin ◽  
Formaldehyde Resin ◽  
Technological Properties

Previously it has been experimentally established that modification of polymeric glue on the basis of urea-formaldehyde resin by adding shungite powder leads to improvement of physical-mechanical properties of wood-particle boards. The goal of the investigation was to establish the influence of the shungite powder, consisting of particles in the size from 50 to 100 nanometers, on such technological properties of glue, as duration of gelatinization and viscosity. It was established: the shortest duration of gelatinization for glues was achieved with shungite addition of 10%; the lowest viscosity depends on the composition of the glue and was achieved with shungite addition from 5 to 10%.

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