stearic acid wood composite

Preparation and cell morphology of ethylenevinyl acetate ...9 May 2014 ... ABSTRACT. The main objective of this study is to obtain ethylene-vinyl acetate copolymer (EVA)/wood-flour foams with low density (< 0.2 g/cm<sup>3</sup>) using chemical blowing agent. stearic acid was used as a compatibilizer to improve not only the compatibility between wood-flour and EVA but also the compatibility between moisture and EVA in this study. The effects of wood-flour content on the density and mechanical properties of EVA/wood-flour foams were studied.

Effects of a new compatibilizer system on the flexural properties of ...20 2004 ... Treatment of wood flour with a commercial paper wet-strength agent Kymene 557H (simply called Kymene) before the mixing of PE and the wood flour increased the modulus of rupture (MOR) and the modulus of elasticity (MOE) of the resulting woodPE composites. Addition of stearic acid in the mixing of PE and the woodKymene mixture further increased the MOR and MOE. stearic anhydride was even more effective than stearic acid in the increase of the MOR&nbsp;...

Treated Tropical Wood Sawdust-Polypropylene Polymer Composite ...27 Sep 2011 ... ing of wood flour with stearic acid and the treatment of wood with sodium hydroxide [11-13]. Kuruvila and Sabu have studied the effect of chemical treatments with alkali, permanganate, isocyanate and peroxide on the tensile properties of short sisal fiber-reinforced polyethylene composites. They reported a considerable improvement of the tensile properties of composites [14]. Also from the previous research, the mechanical properties of natu- ral fibers reinforced&nbsp;...

Wood Fiber Derived From scrap Pallets Used In Polypropylene ...properties of polypropylene (PP) composites combined with either wood flour or wood fiber. wood flour is the most common wood-derived filler used in the plastics industry. Moving from a particulate filler like wood flour to a reinforcing fiber results in property enhancements. In this study, the use of fiber derived from wood pallets and shipping crates as a filler for PP resulted in tensile and flexural strength improvements compared with wood-flour-filled PP. The addition of stearic acid to&nbsp;...

Baerlocher: Stearic AcidCommercial stearic acid is made by separation and hydrogenation of fats and is usually a mixture of stearic acid (C-18) and palmitic acid (C-16). It is solid at room temperature, has a fatty character and is one of the most common saturated fatty acids found in nature. stearic acid is used in the manufacturing of candles, surfactants and fatty alcohols. Furthermore, it finds various applications in the rubber, lubricant and textile industry as well as in the production of EBS waxes, fatty amines&nbsp;...

Reinforcing high density polyethylene with cellulosic fibers. I: The ...High density polyethylene (HDPE) was reinforced with 0-40 wt% of wood flour. (aspen). The effects of: stearic acid, mineral oil, maleated polyethylene wax, and sodium silicate on the tensile and impact strength of the composite were stud- ied. The comparison of tensile properties of the composites showed that the addition of maleated polyethylene wax produced a significant increase in tensile strength, with the increase in filler concentration, while the tensile modulus remained&nbsp;...

because of the poor interfacial adhesion between hydrophilic wood ...8 Jun 2005 ... were made by adding PMDI to wood followed by PE, On top of already very high. MOR of the wood-PE-PMDI composites, stearic acid further increased the MOR. A combination of PMDI and stearic acid resulted in much higher MOR and MOE than MAPE, one of the most effective compatibilizers for wood-PE composites. More importantly, the PMDI-stearic acid compatibilizer system is cost-competitive to MAPE. PMDI is readily available and stearic acid is inexpensive,&nbsp;...

Improvement of chemical stability and durability of ...Electronic Supplementary Information. Improvement of chemical stability and durability of superhydrophobic wood surface via filming TiO2 coated CaCO3 micro-/nano-composite particles. Zhen

A novel method for manufacturing of wood flour/PP composites with ...For parts of work, PP, untreated wood flour, fire retardant, stearic acid and. MAPP were blended in an internal mixer. And for other part of work, PP, treated wood flour, stearic acid and MAPP were blended in an internal mixer. The barrel temperature was 175 oC and the screw speed was 60 rpm. After mixing, the bulky composites were granulated by chipper. Flexural and tensile specimens were molded by an injection machine. The temperatures of the barrels increased from. 145, 150&nbsp;...

Influence of stearic acid treatment of filler particles on the structure ...27 Oct 1999 ... Abstract. In this study, ternary-phase polypropylene (PP) composites containing an ethyleneoctene copolymer (EOR) and calcium carbonate (CaCO3) were investigated. Particular consideration was given to the influence of stearic acid treatment of the filler on the phase morphology and mechanical properties of the composites. In composites containing an uncoated filler, a separate dispersion of the elastomer and filler particles in the PP matrix was observed.

evaluation of coupling mechanisms in wood plastic compositesZinc disassociates from the stearate groups leaving the free stearic acid groups to bond with the MA moieties of the MAPP. This warranted the study of ternary blends to determine if the MAPP/wood polymer interaction or the MAPP/ZnSt interaction would be favored. These studies showed significant favoring of the MAPP/ZnSt interaction over that of the MAPP/wood polymer interactions. The ZnSt successfully inhibits the ability of MAPP to effectively couple with wood, thus decreasing&nbsp;...

Effects of a new compatibilizer system on the flexural properties of ...wood flour increased the modulus of rupture (MOR) and the modulus of elasticity (MOE) of the resulting woodPE com- posites. Addition of stearic acid in the mixing of PE and the woodKymene mixture further increased the MOR and. MOE. stearic anhydride was even more effective than stearic acid in the increase of the MOR and MOE. Compared to woodPE composites without a compatibilizer, the stearic anhydrideKymene compatibilizer system increased the. MOR by about&nbsp;...

Morphology and Thermo Mechanical Properties of Wood ...30 May 2012 ... stearic acid (Stark N.M., 1999; Raj R.G. & Kokta B.V., 1991). However, polymers functionalized with maleic anhydride (Kazayawoko et al., 1999; Bledzki A. K. & Faruk O.,. 2002). The functional groups of these polymers were shown to interact strongly or even react chemically with the surface of wood (Lu et al., 2005; Kazayawoko et al. 1997), while the long alkyl chains diffuse into the matrix making stress transfer possible. The aim of this work is to develop composite&nbsp;...

Study on poly(lactic acid)/natural fibers composites25 Apr 2012 ... ABSTRACT: Recently, the natural fibers-reinforced com- posites have attracted substantial attention as a potential structural material for low cost applications. The composites of poly(lactic acid) (PLA) with three kinds of natural fibers, such as bamboo fibers, wood fibers, and coconut fibers. (CTFs), were prepared by solution-casting technique. The natural fibers were modified by aluminum acid ester cou- pling agent and stearic acid to improve compatibility. To.

Surface modification of spruce wood flour and effects on the ...22 Sep 2010 ... Abstract. Poly (lactic acid) (PLA), a biodegradable aliphatic semicrystalline polyester was filled with 40 wt% spruce wood flour (WF), to produce composite materials. Hydrothermal treatment, as well as maleic anhydride, vinyltrimethoxysilane, and stearic acid surface treatments were applied. The influence of surface modifications for WF was tested in terms of thermal, mechanical, and viscoelastic properties. The recorded results show that in both, the untreated and&nbsp;...

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