wood composites based on crosslinked polypropylene

Improvement of Mechanical Properties of Wood-Plastic Composite ...wood-plastic composites, John Wiley & Sons Inc, New Jersey (2007). 5. F.L. Robert, E.N. Lawrence. Mechanical Properties of Polymers and composites (2nd edition), Marcel Dekker, New York (1993). 6. M. Bengtsson, K. OksmanSilane crosslinked wood plastic composites: Processing and properties. composites Science and Technology, 66 (13) (2006), pp. 2177-2186. 7. H.Z. Liu, F. Yao, Y.J. Xu, Q.L. WuA novel wood flour-filled composite based on microfibrillar high-density ...

Properties and Characterization of Filled Poly(Propylene ...17 Feb 2005 ... Summary: The silane-grafting and water-crosslinking of poly(propylene) (PP) and its composites with calcium carbonate are described. Particular consideration is made on the properties and

Some Exploitation Properties of Wood Plastic Composites Based on ...Three types of birch wood plywood by-products: plywood sanding dust (PSD), plywood sawdust (PSWD) and refined plywood scrap fibres (RPSF) and polypropylene composites exploitation properties (tensile, flexural modulus), microhardness water resistance and fluidity of composite melts, were evaluated. These investigations showed possibility of usage as excellent reinforcements for polypropylene presented by-products. For example tensile modulus increase up to 5 times, but ...

Mechanical characterization of polypropylenewood flour composites20 Feb 2003 ... Abstract. The mechanical performance of different wood flour/polypropylene (PP) composites with interface modifications was compared. wood flour was incorporated into the matrix after esterification with maleic anhydride (MAN) or without any modification but with the addition of a compatibilizing agent [maleic anhydridepolypropylene copolymer (PPMAN)] to modify the polymerfiller interaction. composites were prepared by injection molding with different ...

Toughening of wood plastic composite based on X-PPwood plastic composite(WPC) based on crosslinked polypropylene(X-PP)/wood flour was explored. The peroxide/silane was used as crosslinking system. The sauna incubation under moisture saturated oven was applied to accelerate the competition of the siloxy/moisture networking reaction. There were three parts of the research work; design of experiment, toughening of WPC and the effect of peroxide, silane and PP copolymer on properties of the WPC, respectively.

Evaluation of Kraft lignin as natural compatibilizer in wood flour ...8 Oct 2015 ... Abstract. This study investigated the effect of Kraft lignin as natural compatibilizer on the water absorption, thermal, mechanical, and interfacial properties of poplar wood flour (WF)/polypropylene (PP) composites. Varying contents (0.5, 1, 2, 4, and 8 wt%) of lignin were added to WF and PP by direct mixing, then the composites were prepared by two-screw extrusion and compression moulding. Results showed that lignin incorporation reduced the water absorption and ...

Recycling of polypropylene-based eco-composites - Srebrenkoska ...17 Sep 2008 ... BACKGROUND: Renewable resources and recyclable thermoplastic polymers provide an attractive eco-friendly quality as well as environmental sustainability to the resulting natural fibre-reinforced composites. The properties of polypropylene (PP)-based composites reinforced with rice hulls or kenaf fibres were investigated with respect to their recyclability. Rice hulls from rice processing plants and natural lignocellulosic kenaf fibres from the bast of the plant ...

Influence of type and concentration of maleic anhydride grafted ...26 Apr 2005 ... Abstract. Surface treatments of natural fibers in polymer-wood composites (PWC) are still one of the most interesting subjects for research among technologists, especially with inclusion of other property modifiers in the composites. This work investigated the effects of incorporating different types and contents of maleic anhydride grafted polypropylene (MAPP) and impact modifiers, as property promoters, on the mechanical properties of PP/wood sawdust composites.

Green Composites Based on Blends of Polypropylene with ... - MDPI26 Aug 2017 ... Abstract: Green composites from polypropylene and lignin-based natural material were manufactured using a melt extrusion process. The lignin-based material used was the so called. liquid wood. The PP/Liquid wood blends were extruded with liquid wood content varying from 20 wt % to 80 wt %. The blends were thoroughly characterized by flexural, impact, and dynamic mechanical testing. The addition of the Liquid wood resulted in a great improvement in ...

Effects of silane on the properties of wood-plastic composites with ...18 Aug 2010 ... Adding wood to the PE-PP blends, increased premature cross-linking but also increased gel contents. However, the gel contents of the composites were still low. The PP component did not appear to cross-link well and our gels were almost entirely HDPE. Fourier Transfer Infrared (FTIR) spectra provided additional evidence that TMSPM is grafted and cross-linked in unfilled PE-PP blends. Unfortunately, the spectra of wood composites proved difficult to interpret ...

Green Composites Based on Blends of Polypropylene with ... - MDPI26 Aug 2017 ... Green composites from polypropylene and lignin-based natural material were manufactured using a melt extrusion process. The lignin-based material used was the so called liquid wood. The PP/Liquid wood blends were extruded with liquid wood content varying from 20 wt % to 80 wt %. The blends were thoroughly characterized by flexural, impact, and dynamic mechanical testing. The addition of the Liquid wood resulted in a great improvement in terms of both ...

Improving foam ability of polypropylene by crosslinking - Liu - 2011 ...20 May 2011 ... In this study, silane crosslinked polypropylene (PP) was prepared by grafting of silane onto the backbone of PP in a melt process using a twin-screw extruder and then crosslinking in warm water; an attempt was made to improve the melt strength of PP. In the present work, benzoyl peroxide was used as initiator, silane as a monomer, styrene as assisted crosslinking agent. PP foam board with well-distributed and fine blowing hole was prepared by compression ...

Influence of Ionizing Radiation on the Mechanical Properties of a ...The focus of this study was to examine the potential benefits of irradiating polyethylene (PE)-based wood-plastic composites (WPCs) in order to enhance the mechanical properties of the WPC. The PE-based WPCs ... Biomaterials, 4 (4) (1983), pp. 267-275. [5]. M. Bengtsson, K. Oksman, N.M. StarkProfile Extrusion and Mechanical Properties of crosslinked woodThermoplastic composites. Polymer composites, 27 (2) (2006), pp. 184-194. [6]: Berejka, A., Cleland M., 2011. Industrial ...

Effects of Matrix Modification on the Mechanical Properties of Wood ...14 Dec 2017 ... crosslinking agents for polyolefin, owing to their high free-radical reactivity, for strength enhancement. Therefore, to confer superior mechanical properties of composites based on PP matrix modification, these monomers can be used to restrain the degree of PP degradation and to obtain moderate MAH grafting efficiency. This study is, thus far, the first to explore the effect of PP matrix modification on the mechanical properties of woodpolypropylene composites, ...