Index Catalog // ScholarsArchive@OSU

Development and characterization of new formaldehyde-free soy flour-based adhesives for making interior plywood

Creator:: Huang, Jian
Abstract:: Formaldehyde-based adhesives such as urea-formaldehyde (UF) and phenol-formaldehyde (PF) adhesives dominate the current wood adhesive market. However, these adhesives are derived from petrochemicals and carcinogenic formaldehyde. In this study, we developed two formaldehyde-free adhesives based on abundant, renewable, and inexpensive soy flour (SF). The first adhesive was mainly composed of...
Resource Type:: Masters Thesis
Full Text:: Adhesives for Making Interior Plywood Abstract approved: Kaichang Li Formaldehyde-based adhesives

The effects of extractives and compatibilizers on the flexural properties of natural fiber-thermoplastic composites

Creator:: Saputra, Hartono A.
Abstract:: Natural fibers such as wood, flax, and hemp are frequently used as fillers in natural fiber-plastic composites (NFPCs). At present, wood fiber is the most commonly used filler in the production of wood-plastic composites (WPCs). The advantages of these fibers compared to conventional inorganic fibers such as glass fiber is...
Resource Type:: Masters Thesis
Full Text:: chapter of this thesis investigated the effect of extractives in wood flour on the mechanical properties

Cellulose reinforced high density polyethylene

Creator:: Palaniyandi, Velmurugan
Abstract:: High density polyethylene (HDPE) is a ubiquitous material with versatile properties. It is produced and used in greater volume than any other thermoplastic. HDPE is often filled with a variety of materials for various applications. Glass fiber and wood flour are two common fillers for HDPE. Recently there has been...
Resource Type:: Masters Thesis

Hygro-mechanical response of clear softwood specimens to compression under cyclic climate

Creator:: Guo, Ning
Abstract:: Hygro-mechanical effect is a general term applied to all phenomena that involves interaction between moisture content and mechanical characteristics of hygroscopic materials by analogy to thermo-mechanical effects. The hygromechanical effects include (but are not limited to) free shrinkage/swelling, effect of moisture on elastic modulus, strength, creep, failure mechanisms, and mechano...
Resource Type:: Masters Thesis
Full Text:: Title: Hygro-mechanical Response of Clear Softwood Specimens to Compression under Cyclic Climate

Improving wood strength and stiffness through viscoelastic thermal compression

Creator:: O'Connor, John P.
Abstract:: The objective of this research project was to increase the density, strength, and stiffness of two low to medium-density diffuse-porous hardwood species. Wood used in this study was processed using a method of wood densification known as “Viscoelastic Thermal Compression” (VTC). The VTC process is a three phase treatment which...
Resource Type:: Masters Thesis
Full Text:: ). The VTC process is a three phase treatment which incorporates saturated steam treatment, mechanical

Characterization of load transfer in wood-based composites

Creator:: Schwarzkopf, Matthew John
Abstract:: The mechanical performance of composite materials is determined by the mechanical properties of their individual components and the effective load transfer between these components. Binders are commonly used to bond composite components together and to provide effective load transfer between them. In wood-based composites the binder-component load transfer occurs at...
Resource Type:: Dissertation
Full Text:: : ________________________________________________________________________ Lech Muszyński The mechanical performance of composite materials is determined by the

Developing Design Model for Cellulose Nanocomposites

Creator:: Shir Mohammadi, Meisam
Abstract:: Today nano scale materials are being used for wide range of applications. One promising topic in nano scale materials is using them for reinforcement of different polymeric materials to reach desirable stiffness properties. The stiffness of these materials is mostly found experimentally because the nanocomposite community lacks a decent analytical...
Resource Type:: Dissertation
Full Text:: . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103 5.2.2 Nanocomposite Fabrication . . . . . . . . . . . . . . . . . . . . . 104 5.2.3 Mechanical

Interfacial shear strength of wood-plastic composites

Creator:: Rogers, James F.
Abstract:: This study examined the relationship of interfacial shear strength (IFSS) and bending strength (MOR) of several different wood-plastic composites (WPC's). Plastics utilized were high-density polyethylene (HDPE) and polypropylene (PP). Pine and oak were used as the wood species. Compatibilizers used included maleicanhydride polyethylene (MAPE), polymeric methylene diphenyl diisocyanate (PMDI), KymeneTM,...
Resource Type:: Masters Thesis
Full Text:: Polymers used in WPC's 7 1.3.3 WPC Formulation, Manufacture, and Use 7 1.3.4 Physical and Mechanical

Numerical modeling and experiments on wood-strand composites

Creator:: Le, Edward A.
Abstract:: In wood-based composites, the glue-line (interface) between wood-strands affects the stress transfer from one member to the next. The glue-line properties determine the rate of load transfer between phases and these properties depend on wood species, surface preparation, glue properties, glue penetration into wood cells, and moisture content of the...
Resource Type:: Dissertation

Functional decreases in hydraulic and mechanical properties of field-grown transgenic poplar trees caused by modification of the lignin synthesis pathway through downregulation of the 4-coumarate:coenzyme A ligase gene

Creator:: Voelker, Steven L.
Abstract:: Society uses massive quantities of wood fiber in production of paper, and demand for fiber is projected to increase further as production of biofuels from fermentation of plant cellulosic materials increases. Because these end uses generally require the costly step of removing of lignin, wood with reduced or more easily...
Resource Type:: Dissertation
Full Text:: Mechanical Properties of Field-grown Transgenic Poplar Trees Caused by Modification of the Lignin Synthesis

Wood structure as related to drying problems

Creator:: West, W. I. (William Irvin), 1916-, Western Dry Kiln Clubs, and Western Dry Kiln Clubs. Meeting (7th : 1955 : Klamath Falls, Or.)
Resource Type:: Conference Proceeding

How kiln schedules affect strength

Creator:: Wengert, Eugene M., Western Dry Kiln Association, and Western Dry Kiln Association. Meeting (38th : 1987)
Resource Type:: Conference Proceeding

Investigation of Styrene-Free Unsaturated Polyester Resins for Fiber-Reinforced Composites

Creator:: Wu, Yili
Abstract:: Most of existing commercial unsaturated polyester (UPE) resins are typically composed of a UPE and a high amount of highly volatile, flammable, and toxic styrene. The emission of hazardous styrene in the handling of the UPE resins and the preparation and use of fiber-reinforced UPE composites poses severe hazards to...
Resource Type:: Dissertation
Full Text:: mechanical analyses. Mechanical properties such as flexural and tensile properties of the composites were

Morphological characterization of wood plastic composite (WPC) with advanced imaging tools : developing methodologies for reliable phase and internal damage characterization

Creator:: Wang, Yi
Abstract:: Wood plastic composites (WPCs) are composite materials made from thermoplastic polymers, wood flour, and a small amount of process- and property-enhancing additives; they are principally used in the automotive industry and as secondary building materials. Although the WPC market is expected to keep growing, it is still relatively small when...
Resource Type:: Masters Thesis
Full Text:: mechanical property loss in these degradation treatments. Thesis Structure and Units This thesis is

Direct coupling of imaging to morphology-based numerical modeling as a tool for mechanics analysis of wood plastic composites

Creator:: Lin, Xiang
Abstract:: Polymeric composites reinforced with bio-materials have advantages over composites with synthetic reinforcements. Bio-based composites use low-cost and renewable reinforcements, have nonabrasive properties for machining, have improved damping characteristics, and have potential for energy recycling. However, the limited use of bio-based composites is because their mechanical properties are typically much lower...
Resource Type:: Masters Thesis
Full Text:: overall mechanical property enhancements were with ponderosa pine particles. Another important factor

Optimizing the performance of gypsum wall board in wood frame shear walls

Creator:: Goodall, Scott I.
Abstract:: The overall goal of this project was to design a wood frame shear wall that could withstand greater displacement before damage occurred to the Gypsum Wall Board (GWB). More specifically, the objectives of the study were: (1) to evaluate damage to the GWB in alternative shear wall designs at 1%,...
Resource Type:: Masters Thesis
Full Text:: Variation in Mechanical Property Results ......................................................... 171

Chemical modification of wood : dimensional stabilization of viscoelastic thermal compressed wood

Creator:: Gabrielli, Christopher P.
Abstract:: The tendency of wood to shrink and swell with changing moisture content remains as one of the most significant challenges to using wood in its many applications. Viscoelastic Thermal Compression (VTC) has been shown to significantly increase the density, strength and stiffness of wood. However, dimensional stability is still a...
Resource Type:: Masters Thesis
Full Text:: dynamic heat, steam, and mechanical compression treatment to densify wood. This process takes advantage

Modeling changes in flexural properties of softwood beams during fungal decomposition

Creator:: Mitsuhashi Gonzalez, June M.
Abstract:: Moisture intrusion in residential structures can lead to substantial fungal decay and this damage costs billions in repair/replacement costs. The extent of damage and the rate at which it occurs are primarily dependent on the wood moisture content and temperature in the structure. Determining the risk of decay for various...
Resource Type:: Dissertation
Full Text:: evidence showing that fungi cause dramatic losses in the mechanical and flexural properties of wood at

Copper compounds for durable composites : effects on material properties

Creator:: Vidrine, Cheney L.
Abstract:: The effects of incorporation of selected biocides on physical and mechanical properties of aspen strandboard were assessed using five copper-based preservatives or zinc borate at three retention levels. Tebuconazole or 4,5-dichloro-2-N-octyl-4-isothiazolin-3-one (DCOI) were added as co-biocides to selective copper-based treatments. Mold box tests showed that only panels treated with DCOI...
Resource Type:: Masters Thesis
Full Text:: on physical and mechanical properties of aspen strandboard were assessed using five copper-based

The effect of elevated temperature on mechanical behavior of structural wood and wood-based composites

Creator:: Sinha, Arijit
Abstract:: Engineers, in practice, are often faced with the challenge of evaluating a fire-damaged structure and developing a rehabilitation and retrofit plan. In order to decide on a rehabilitation and retrofit plan, information on thermal degradation of building materials and connections are vital. A critical knowledge gap exists in terms of...
Resource Type:: Dissertation
Full Text:: 10, 2010. Title: The Effect of Elevated Temperature on Mechanical Behavior of Structural Wood

Behavior of Cross-Laminated Timber Diaphragm Panel-to-Panel Connections with Self-Tapping Screws

Creator:: Sullivan, Kyle
Abstract:: The goal of this project is to contribute to the development of design values for cross-laminated timber (CLT) diaphragms in the seismic load-resisting system for buildings. Monotonic and cyclic tests to determine strength and stiffness characteristics of 2.44 m (8 ft) long shear connections with common self-tapping screws were performed....
Resource Type:: Masters Thesis
Full Text:: ) plywood splines, 52.5mm (2.06 in) 3-ply CLT, and vertical self-tapping screws in shear produced

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