Improvement of wood polymer composite mechanical properties by direct fluorination

2015 ◽  
Vol 74 ◽  
pp. 61-66 ◽  
Author(s):  
K. Charlet ◽  
F. Saulnier ◽  
M. Dubois ◽  
A. Béakou
Keyword(s):  
Mechanical Properties ◽  
Polymer Composite ◽  
Direct Fluorination ◽  
Wood Polymer ◽  
Wood Polymer Composite

Performance of Wood-Polymer Composite Prepared by In Situ Synthesis of Terpolymer within Wood

2010 ◽  
Vol 34-35 ◽  
pp. 1165-1169 ◽  
Author(s):  
Yong Feng Li ◽  
Bao Gang Wang ◽  
Qi Liang Fu ◽  
Yi Xing Liu ◽  
Xiao Ying Dong
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Polymer Composite ◽  
Value Added ◽  
Untreated Wood ◽  
Modulus Of Rupture ◽  
Hydroxyl Group ◽  
Wood Polymer ◽  
Wood Polymer Composite

In order to improve the value-added applications of low-quality wood, a novel composite, wood-polymer composite, was fabricated by in-situ terpolymerization of MMA, VAc and St within wood porous structure. The structure of the composite and the reaction of monomers within wood were both analyzed by SEM and FTIR, and the mechanical properties were also evaluated. The SEM observation showed that the polymer mainly filled up wood pores, suggesting good polymerizating crafts. The FTIR results indicated that under the employed crafts, three monomers terpolymerized in wood porous structure, and grafted onto wood matrix through reaction of ester group from monomers and hydroxyl group from wood components, suggesting chemical combination between the two phases. The mechanical properties of the wood-polymer composite involving modulus of rupture, compressive strength, wearability and hardness were improved 69%, 68%, 36% and 210% over those of untreated wood, respectively. Such method seems to be an effective way to converting low-quality wood to high-quality wood.

Mechanical Properties of Barley Straw/HDPE Composites Produced with Extrusion Process

2021 ◽  
Vol 410 ◽  
pp. 593-598
Author(s):  
Anton M. Kuzmin ◽  
Nadir Ayrilmis ◽  
Vladimir N. Vodyakov
Keyword(s):  
Mechanical Properties ◽  
Polymer Composite ◽  
Physical And Mechanical Properties ◽  
Extrusion Process ◽  
Barley Straw ◽  
Processing Temperature ◽  
Screw Extruder ◽  
Wood Polymer ◽  
Twin Screw ◽  
Wood Polymer Composite

This paper is devoted to the study of the technological process for the production of tape from polyethylene and wood-polymer composite by extrusion. At the first stage, the wood-polymer composite granulate was obtained on a co-rotating twin-screw extruder. The tape was made on a Rheomex 19/25 PolyLab OS single-screw extruder with a barrel length L/D = 25. The processing temperature of the wood-polymer composite was in the range of 145 ... 160°C. The tensile strength and elasticity modulus in tension, water absorption per day and density were investigated for the developed wood-polymer composite and polyethylene. It has been found out that for the developed wood-polymer composite, the strength and elastic modulus along the stretch direction increase by 11% and 6%, respectively. Orientation stretching has a significant effect on the physical and mechanical properties of wood-polymer composites.

The effect of processing conditions on the mechanical properties and morphology of self-reinforced wood-polymer composite

2013 ◽  
Vol 34 (10) ◽  
pp. 1567-1574 ◽  
Author(s):  
Jianchen Cai ◽  
Mingyin Jia ◽  
Ping Xue ◽  
Yun Ding ◽  
Xiang Zhou
Keyword(s):  
Mechanical Properties ◽  
Polymer Composite ◽  
Processing Conditions ◽  
Wood Polymer ◽  
Wood Polymer Composite

Application of the modified hybrid rule of mixture (ROHM) and Halpin– Tsai equation for predicting mechanical properties of wood/hemp/polymer composites

2019 ◽  
Vol 106 ◽  
pp. 4-8
Author(s):  
CEZARY GOZDECKI
Keyword(s):  
Mechanical Properties ◽  
Mathematical Models ◽  
Polymer Composites ◽  
Young’S Modulus ◽  
Polymer Composite ◽  
Hybrid Composites ◽  
Young's Modulus ◽  
Wood Polymer ◽  
Wood Particles ◽  
Wood Polymer Composite

Application of the modified hybrid rule of mixture (ROHM) and Halpin–Tsai equation for predicting mechanical properties of wood/hemp/polymer composites. An object of investigations was hybrid wood-polymer composite containing HDPE, hemp fibers and wood particles. The degree of addition of hemp and wood particles ranged from 0 to 60% of filler. The usefulness of the mathematical models ROHM and Halpin-Tsai to predict the Young's modulus of composites was tested. Additionally, experimental research was carried out. It was found that the hemp content in the wood-polymer composite significantly influences the growth of the composite module. The usefulness of mathematical models for predicting the Young's modulus of hybrid composites was also confirmed.

Preparation and Property of Wood Polymer Composite with a Two-Step Method

2009 ◽  
Vol 79-82 ◽  
pp. 1527-1530
Author(s):  
Yong Feng Li ◽  
Yi Xing Liu ◽  
Hai Peng Yu ◽  
Wen Shuai Chen
Keyword(s):  
Mechanical Properties ◽  
Porous Structure ◽  
Polymer Composite ◽  
Cell Walls ◽  
Untreated Wood ◽  
Hydroxyl Group ◽  
Step Method ◽  
Wood Polymer ◽  
Wood Polymer Composite ◽  
Modified Wood

Wood as a porous structure has weak durability and unsatisfactory mechanical properties which limits its utilization. For this reason, the study presents a two-step method to prepare a new modified wood material—Wood Polymer Composite. Maleic anhydride(Man) firstly penetrates into the porous structure of wood, followed by a reaction with wood cell walls. Then, Styrene(St) with some Man and a few amount of initiator, AIBN, permeate through the whole wood and react with the above modified wood. The structural characterization of wood polymer composite with SEM and FTIR indicates that Man reacts successfully with the hydroxyl group of wood cell wall by its anhydride group, and further reacts fully with styrene as a free radical copolymerization form by its double bond; and thus the polymer fills in wood cell lumina as a solid form, which combines the wood cell walls without any evident crack. The testing results of properties show that the mechanical properties of wood polymer composite increase by about 50%-250% over those of unmodified wood, and its durability improve 1.9-4.89 times than untreated wood.

Mechanical Properties of Wood-Polymer Composite Prepared by In-Situ Polymerization of Methyl Methacryalte and Styrene

2012 ◽  
Vol 166-169 ◽  
pp. 2938-2941 ◽  
Author(s):  
Yong Feng Li ◽  
Ding Wang Gong ◽  
Xiao Ying Dong ◽  
Zhen Bo Liu
Keyword(s):  
Mechanical Properties ◽  
Polymer Composite ◽  
In Situ Polymerization ◽  
Untreated Wood ◽  
Modulus Of Rupture ◽  
Test Results ◽  
Wood Polymer ◽  
Wood Based Composite ◽  
Wood Polymer Composite

Fast-growing poplar wood, Populus ussuriensis Kom, was used to prepare novel wood-polymer composite by the in-situ polymerization of methyl methacrylate (MMA) and styrene (St). SEM observation and FTIR analysis indicated that the resulted polymer well filled up wood cell lumen and physically reinforce wood matrix. The test results also proved that the mechanical properties of wood including modulus of rupture, modulus of elasticity, compression strength and hardness of were improved by 68.28%, 110.27%, 62.43%, 357% over those of Untreated Wood, respectively. Such wood-based composite could be potentially used as reinforced material in construction fields.

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