EFFECT OF CELL WALL MODIFICATION OF STYRENE WOOD POLYMER WITH MALEIC ANHYDRIDE AND GLYCIDYL METHACRYLATE ON THERMAL STABILITY, MECHANICAL BEHAVIOR AND BIOLOGICAL RESISTANCE OF COMPOSITE

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HEYDARI F.; GHORBANI M.; ZABIHZADEH S.M.

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Journal: IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES Year:2017 | Volume:7 | Issue:4 Page(s): 601-614

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Title

EFFECT OF CELL WALL MODIFICATION OF STYRENE WOOD POLYMER WITH MALEIC ANHYDRIDE AND GLYCIDYL METHACRYLATE ON THERMAL STABILITY, MECHANICAL BEHAVIOR AND BIOLOGICAL RESISTANCE OF COMPOSITE

Author(s)

HEYDARI F. | GHORBANI M. | ZABIHZADEH S.M. | Issue Writer Certificate

Keywords

WOOD–POLYMERQ1

MECHANICAL PROPERTIESQ2

GLYCIDYL METHACRYLATEQ1

MALEIC ANHYDRIDEQ2

DECAY RESISTANCEQ2

Abstract

This research investigated the effect of MALEIC ANHYDRIDE and GLYCIDYL METHACRYLATE on thermal and mechanical behaviors and natural durability of wood polymer made from hornbeam and styrene monomer. Samples of mechanical and biological tests were prepared in five levels; control, modified with MALEIC ANHYDRIDE (MA), styrene (ST), MALEIC ANHYDRIDE/styrene (MA-ST) and MALEIC ANHYDRIDE/styrene/glycidyl methacrylate (MA-ST-GMA), according to ASTM D143 and EN113 standards, respectively. Impregnation was performed by vacuum- pressure method using experimental cylinder. Samples treated by MA were heated in oven for 4 hours at 120oC. After the impregnation with styrene monomer, polymerization was performed in oven at 90oC for 24 hours, and subsequently at 103±2oC for the same period. Bulking of modified wood with MA, the presence of ST in the cell cavities, and interaction between polymer and cell wall through modification with MA and GMA were confirmed by scanning electron microscopy. Formation of network structure due to the reactions between ST, GMA, MA and wood resulted in an improved thermal stability of composite. Weight gain was increased from 24.69% to 42.83 and 44.42 in MA-ST and MA-ST-GMA samples, respectively, due to modification in styrene samples. The lowest porosity (21%) was observed in MA-ST-GMA samples. The highest improvement of MECHANICAL PROPERTIES was measured in MA-ST-GMA samples compared with the control. MA with double bonds and carboxylate group showed a high reactivity with wood and polymer. In addition, difunctional GMA monomer caused better adhesion of polymer to cell wall through the reaction by hydroxyl group or MA and styrene monomer. A significant improvement in the MECHANICAL PROPERTIES of modified levels can attributed to interaction of polymer complex with modified cell walls and uniform distribution of polymer in cell lumens. Cell wall modification with MA and presence of GMA prevented the development of fungi mycelium through reduction and blocking of hydroxyl groups, changing the hollocellulose structure, and the presence of polymer in wood as a hard physical barrier.

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APA: Copy

HEYDARI, F., GHORBANI, M., & ZABIHZADEH, S.M.. (2017). EFFECT OF CELL WALL MODIFICATION OF STYRENE WOOD POLYMER WITH MALEIC ANHYDRIDE AND GLYCIDYL METHACRYLATE ON THERMAL STABILITY, MECHANICAL BEHAVIOR AND BIOLOGICAL RESISTANCE OF COMPOSITE. IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES, 7(4), 601-614. SID. https://sid.ir/paper/184339/en

Vancouver: Copy

HEYDARI F., GHORBANI M., ZABIHZADEH S.M.. EFFECT OF CELL WALL MODIFICATION OF STYRENE WOOD POLYMER WITH MALEIC ANHYDRIDE AND GLYCIDYL METHACRYLATE ON THERMAL STABILITY, MECHANICAL BEHAVIOR AND BIOLOGICAL RESISTANCE OF COMPOSITE. IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES[Internet]. 2017;7(4):601-614. Available from: https://sid.ir/paper/184339/en

IEEE: Copy

F. HEYDARI, M. GHORBANI, and S.M. ZABIHZADEH, “EFFECT OF CELL WALL MODIFICATION OF STYRENE WOOD POLYMER WITH MALEIC ANHYDRIDE AND GLYCIDYL METHACRYLATE ON THERMAL STABILITY, MECHANICAL BEHAVIOR AND BIOLOGICAL RESISTANCE OF COMPOSITE,” IRANIAN JOURNAL OF WOOD AND PAPER INDUSTRIES, vol. 7, no. 4, pp. 601–614, 2017, [Online]. Available: https://sid.ir/paper/184339/en

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