tailieunhanh - Properties of particleboard produced with liquefaction-modified phenol-formaldehyde adhesive

Pinus densiflora wood flour was liquefied in the presence of phenol, using sulfuric acid as a catalyst. Liquefaction-modified phenol-formaldehyde (LPF) resins were synthesized as particleboard binder. The physical characteristics of the laboratory-synthesized control PF resin and the LPF resins are described. | Research Article Turk J Agric For 34 (2010) 303-308 © TÜBİTAK doi: Properties of particleboard produced with liquefaction-modified phenol-formaldehyde adhesive Jung-Uk LEE, Yong-Sung OH* Department of Forest Resources, College of Natural Resources, Yeungnam University, Gyeongsan 712-749, KOREA Received: Abstract: Pinus densiflora wood flour was liquefied in the presence of phenol, using sulfuric acid as a catalyst. Liquefaction-modified phenol-formaldehyde (LPF) resins were synthesized as particleboard binder. The physical characteristics of the laboratory-synthesized control PF resin and the LPF resins are described. Laboratory particleboard (PB) was made using Korean hybrid poplar (Populus alba × glandulosa) particles with the control PF resin and LPF resins. The physical strength and dimensional stability of the PBs were tested according to ASTM D 1037-99 and KS F 3104 standard procedures. PB test results show that the physical and mechanical strength properties differed significantly according to resin type; however, all PBs made in this study exceeded the minimum strength requirement of the Korean Standard KS F 3104 for PB type . Key words: Particleboard, hybrid poplar, adhesive, resin Introduction Currently, there is renewed interest in the development of abundant, renewable, biomass resources for the production of polymeric materials. According to the Food and Agriculture Organization of the United Nations, yearly growth of world forests is approximately 7-9 billion m3 of biomass (FAO 1966). Lignocellulosic biomass, such as wood and bark, can be liquefied easily in a variety of organic solvents using acid catalysts to produce homogeneous liquefaction materials (Alma et al. 2001; Lee and Liu 2003). These liquefied wood solutions consist of many carbohydrate- and lignin-derived components with useful applications. Liquefied wood solutions have been used successfully as wood adhesives (Lee and Liu .

• Nông nghiệp
• Pinus densiflora wood
• Liquefaction modified phenol formaldehyde
• Oriented strand board
• Hybrid poplar
• Physical characteristics
• Organic manures
• Organic manures on physical
• Physical and chemical characteristics
• Chemical characteristics of mango
• Ambient storage conditions
• Physical fitness
• Small tea plantations
• Back strength
• Indigenous garo tea plucking women
• Maize shelling
• Psycho physical characteristics
• Developed pedal
• Operated rotary maize sheller
• Pedal operated rotary maize
• Physical status
• Vietnamese people's morphology
• Physical indexes
• Evaluate morphological
• Physical health
• Physical and morphometric characteristics
• Morphometric characteristics
• Khillar breed of cattle
• Muzzle color was mostly black
• Standard error for correlation coefficients
• Polymer modified jute fibre
• Reinforcing agent controlling
• The physical and mechanical characteristics
• Cement mortar
• Water absorption
• Some physical results of single electron transitor
• Single electron transistor
• Current voltage characteristics
• Current voltage characteristics of SET
• Metallic and semiconducting SET
• Horsegram (Macrotyloma uniflorum (Lam) Verdc )
• Food legumes
• Functional characteristics
• Physical properties
• Swelling index
• 1 methyl cyclopropane
• Fruit firmness retention
• Physical characteristics in banana
• Response of 1 MCP
• 1 MCP on physiological
• Conformity index
• Homogeneity index
• Lung cancer
• Esophageal cancer
• Physical characteristics between two AAA
• Morphological characteristics
• Chemical characteristics
• Soil classification
• Land capability
• Water holding capacity
• Characteristics curve
• Greenhouse growing media
• Soil moisture characteristics curve
• Physical activity
• Self determination theory
• Motivational profile
• Favorable characteristics compared
• Physical activity level
• Carbohydrate polymers
• Physical chemical characteristics
• Gas chromatography
• Novel alginate based hydrogel
• Solid phase microextraction
• BMC Musculoskeletal Disorders
• Pain catastrophizing
• Fear of movement
• Psychological characteristics
• Tobacco streak virus
• Dilution end point
• Thermal inactivation point
• Black gram necrosis inciting tobacco streak virus
• Elephant foot yam
• Papad preparation
• Nutritional composition
• Oraganoleptic evaluation
• Small millet varieties
• Physical characteristics of grains
• Sensory characteristics of porridge
• Best variety screening
• Screening of small millet varieties
• Agricultural science
• Physicochemical characteristics of honey
• Chemical composition
• Geographical origins
• Michael broadbent's wine tasting
• Wine tasting
• Origins of taste characteristics
• Main regional characteristics
• Appropriate order of tasting
• Physical hazards
• báo cáo khoa học
• báo cáo y học
• công trình nghiên cứu về y học
• tài liệu về y học
• cách trình bày báo cáo
• báo cáo hóa học
• công trình nghiên cứu về hóa học
• tài liệu về hóa học
• Physical and chemical characteristics of soil
• Vegetation along river
• Alluvial ground
• Accretion land
• Thảm thực vật ven sông
• Đất bồi tụ lâu năm
• Mangifera indica L
• Inflorescences characteristics
• Agro climatic conditions
• Morpho physical characters
• Germplasm on inflorescence characters
• BMC Veterinary Research
• Biological characteristics
• Physical and chemical factors
• Weakly acidic
• DNA virus