Effect of Maleic Anhydride Polypropylene Copolymer Addition on the Physical and Mechanical Properties of Polymeric Diphenylmethane Diisocyanate–Bonded Oriented Strand Board Panels

2009 ◽  
Vol 59 (10) ◽  
pp. 47-51
Author(s):  
Thomas C. Ruffing ◽  
Nicole R. Brown ◽  
Vikram Yadama ◽  
Jone S. Cionni ◽  
Timothy Takah ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Oriented Strand Board ◽  
Physical And Mechanical Properties ◽  
Diphenylmethane Diisocyanate ◽  
Polymeric Diphenylmethane Diisocyanate

Reactive maleic anhydride polyolefins (MAPOs) in oriented strand board. Part 2: Influence on physical and mechanical properties

Holzforschung ◽  
2011 ◽  
Vol 65 (1) ◽  
pp. 89-96 ◽  
Author(s):  
Sudip Chowdhury ◽  
Vikram Yadama
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Oriented Strand Board ◽  
Phenol Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Modulus Of Rupture ◽  
Moisture Resistance ◽  
Thickness Swelling ◽  
Water Vapor Transmission ◽  
Reduced Water

Abstract The use of reactive polyolefin and phenol formaldehyde (PF) resin blends to improve the moisture durability of oriented strand composite (OSC) panels was investigated. Test panels were hot pressed with adhesive blends consisting of varying proportions of PF and maleic anhydride polypropylene (MAPP) anionic emulsion, and their physical and mechanical properties were evaluated. The addition of MAPP did not significantly affect the modulus of elasticity (MOE) of the panels, but reduced the modulus of rupture in bending (MOR) for 12% moisture content (MC) and 24-h soak specimens. An increase in PF content significantly improved the MOE and MOR of specimens subjected to the environment. Adding MAPP reduced internal bond strength, particularly at higher PF levels. The addition of MAPP and raising PF levels significantly reduced water absorption and thickness swelling of the panels. At higher MAPP levels, the water vapor transmission in OSC as well as the permeance of the material, was reduced. Composite board equilibrated to lower MC with increasing MAPP content in the resin blend. The results indicate that increasing the PF content is the most effective method of improving both moisture resistance and the mechanical properties of OSC; addition of MAPP improves the moisture resistance of the panels, but significantly reduces their mechanical properties.

Effect of Maleic-Anhydride Grafting on the Physical and Mechanical Properties of Poly(L-lactic acid)/Starch Blends

2012 ◽  
Vol 298 (6) ◽  
pp. 624-633 ◽  
Author(s):  
Sung Wook Hwang ◽  
Jin Kie Shim ◽  
Susan Selke ◽  
Herlinda Soto-Valdez ◽  
Maria Rubino ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Maleic Anhydride ◽  
Physical And Mechanical Properties ◽  
Starch Blends

scholarly journals Effects of Resin Content on the Characteristics of Bamboo Oriented Strand Board Prepared from Strands of Betung, Ampel, and Their Mixtures

2021 ◽  
Vol 9 (3) ◽  
pp. 454-465
Author(s):  
Tengku Muhammad Renzy Hariz ◽  
Indra Agus Santosa ◽  
Muhammad Iqbal Maulana ◽  
Marwanto ◽  
Denni Prasetia ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Dimensional Stability ◽  
Oriented Strand Board ◽  
Physical And Mechanical Properties ◽  
Resin Content ◽  
Thickness Swelling ◽  
Higher Dimensional ◽  
Bambusa Vulgaris ◽  
Dendrocalamus Asper

The objectives of this research were to evaluate bamboo-oriented strand board (BOSB) characteristics made from betung (Dendrocalamus asper), ampel (Bambusa vulgaris), and their mixtures at two different contents (3% and 5%) of methylene diphenyl di-isocyanate (MDI) adhesives. The strands were steam-treated at 126°C for 1 h under the pressure of 0.14 MPa. Three-layered BOSBs with a target density of 0.7 g/cm3 were made with the size of 30 cm x 30 cm x 0.9 cm and a shelling ratio of 1:2:1 (face:core:back layers). The physical and mechanical properties of BOSB were evaluated following JIS A 5908 (2003) standard, and the results were compared with the CSA 0437.0 Grade O-1 standard. The results show that BOSB from the mixtures of betung and ampel bamboo strands has higher dimensional stability as shown by the decrease in water absorption and thickness swelling and higher mechanical properties than single BOSB. All BOSBs with 5% resin content have higher dimensional stability, MOE, and MOR than BOSB with 3% resin content. The physical and mechanical properties of all BOSB manufactured met the CSA 0437.0 Grade O-1 standard. This study proved that BOSBs from the mixture of betung and ampel strands have the potential to be developed due to having better physical and mechanical qualities than a single BOSB. Keywords: ampel (Bambusa vulgaris), bamboo oriented strand board, betung (Dendrocalamus asper), resin content, strand mixtures

Selected Physical and Mechanical Properties of Bamboo and Poplar Composite OSB with Different Hybrid Ratios

2012 ◽  
Vol 517 ◽  
pp. 87-95 ◽  
Author(s):  
Cheng Yong ◽  
Ming Jie Guan ◽  
Qi Sheng Zhang
Keyword(s):  
Mechanical Properties ◽  
Oriented Strand Board ◽  
Physical And Mechanical Properties ◽  
High Strength ◽  
Raw Material ◽  
Mixed Structure ◽  
The World ◽  
Utilization Ratio ◽  
Application Fields ◽  
Good Substitute

Bamboo has been known as a good substitute of engineered wood raw material in the world for its naturally oriented high strength. In this paper, we made the bamboo and poplar composite OSB (oriented strand board) with different hybrid ratios in order to understand the technical feasibility of this composite OSB and to expand the engineered utilization of bamboo. The physical and mechanical properties are tested and the effect of different hybrid ratios on physical and mechanical properties of the board was analyzed. Using this bamboo and wood mixed structure, not only are we to improve the properties of the board, but also to expand the application fields, moreover to enhance the utilization ratio of resources.

scholarly journals Properties of Eco-Friendly Particleboards Bonded with Lignosulfonate-Urea-Formaldehyde Adhesives and pMDI as a Crosslinker

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4875 ◽  
Author(s):  
Pavlo Bekhta ◽  
Gregory Noshchenko ◽  
Roman Réh ◽  
Lubos Kristak ◽  
Ján Sedliačik ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Urea Formaldehyde ◽  
Physical And Mechanical Properties ◽  
Diphenylmethane Diisocyanate ◽  
Thickness Swelling ◽  
Sodium Lignosulfonate ◽  
Formaldehyde Content ◽  
Uf Resin ◽  
Adhesive Compositions

The purpose of this study was to evaluate the feasibility of using magnesium and sodium lignosulfonates (LS) in the production of particleboards, used pure and in mixtures with urea-formaldehyde (UF) resin. Polymeric 4,4′-diphenylmethane diisocyanate (pMDI) was used as a crosslinker. In order to evaluate the effect of gradual replacement of UF by magnesium lignosulfonate (MgLS) or sodium lignosulfonate (NaLS) on the physical and mechanical properties, boards were manufactured in the laboratory with LS content varying from 0% to 100%. The effect of LS on the pH of lignosulfonate-urea-formaldehyde (LS-UF) adhesive compositions was also investigated. It was found that LS can be effectively used to adjust the pH of uncured and cured LS-UF formulations. Particleboards bonded with LS-UF adhesive formulations, comprising up to 30% LS, exhibited similar properties when compared to boards bonded with UF adhesive. The replacement of UF by both LS types substantially deteriorated the water absorption and thickness swelling of boards. In general, NaLS-UF-bonded boards had a lower formaldehyde content (FC) than MgLS-UF and UF-bonded boards as control. It was observed that in the process of manufacturing boards using LS adhesives, increasing the proportion of pMDI in the adhesive composition can significantly improve the mechanical properties of the boards. Overall, the boards fabricated using pure UF adhesives exhibited much better mechanical properties than boards bonded with LS adhesives. Markedly, the boards based on LS adhesives were characterised by a much lower FC than the UF-bonded boards. In the LS-bonded boards, the FC is lower by 91.1% and 56.9%, respectively, compared to the UF-bonded boards. The boards bonded with LS and pMDI had a close-to-zero FC and reached the super E0 emission class (≤1.5 mg/100 g) that allows for defining the laboratory-manufactured particleboards as eco-friendly composites.

Grafting of maleic anhydride on poly(L-lactic acid). Effects on physical and mechanical properties

2012 ◽  
Vol 31 (2) ◽  
pp. 333-344 ◽  
Author(s):  
Sung Wook Hwang ◽  
Sang Bong Lee ◽  
Chang Kee Lee ◽  
Jun Young Lee ◽  
Jin Kie Shim ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Lactic Acid ◽  
Maleic Anhydride ◽  
Physical And Mechanical Properties

Effect of Montmorillonite and Maleic Anhydride Grafted Polypropylene Content on Polypropylene/Wood Flour Composites

2011 ◽  
Vol 110-116 ◽  
pp. 596-599
Author(s):  
Hossein Khanjanzadeh ◽  
Taghi Tabarsa
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Wood Flour ◽  
Physical And Mechanical Properties ◽  
Hot Press ◽  
Absorption Properties ◽  
Melt Compounding ◽  
Mechanical Bending ◽  
Positive Effect ◽  
Physical Thickness

In this study the effect of nanoclay (0, 3 and 5 wt %) and grafted anhydride maleic with polypropylene (MAPP, 3 and 5 wt%) on physical and mechanical properties of polypropylene/wood flour nanocomposite was investigated. For manufacturing of these composites after melt compounding of the material they were converted to wood plastic granules in extruder and placed in hot press. The results showed that with increase of nanoclay physical (thickness swilling and water absorption) properties increases significantly but mechanical (bending and module of elasticity) properties increase up to 3 percent but after that gradually decreases. Also with incorporation of MAPP physical and mechanical properties of this nanocomposites improved and this positive effect was stronger for 5 percent MAPP than 3 one.

Physical and Mechanical Properties of Thermoplastic Natural Rubber (TPNR) Nanocomposites

2012 ◽  
Vol 576 ◽  
pp. 394-397 ◽  
Author(s):  
Noor Azlina Hassan ◽  
Hassan Norita ◽  
Sahrim Haji Ahmad ◽  
Rozaidi Rasid ◽  
Hazleen Anuar ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Maleic Anhydride ◽  
Natural Rubber ◽  
Physical And Mechanical Properties ◽  
Melt Blending ◽  
Mixing Parameters ◽  
Blending Method ◽  
Thermoplastic Natural Rubber ◽  
Internal Mixer

Thermoplastic natural rubber (TPNR) nanocomposites were prepared by melt blending method with the optimum mixing parameters (140oC, 100 rpm, 12 min) using internal mixer (Haake 600 P). The aim of this work is to study the effects of organo-montmorillonite (OMMT) on the physical and mechanical properties of TPNR with and without coupling agent (maleic anhydride grafted polyethylene, MA-PE). Significant improvement in tensile strength and modulus of TPNR nanocomposites were obtained with the presence of MA-PE.

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