Title: COMPOSITES OF RICE HUSK/WHEAT STRAW WITH PMDI RESIN AND POLYPROPYLENE
Page Range: p.619-625
Author(s): Frounchi M; Dadbin S; Jahanbakhsh J; Janat-Alipour M
File size:
Download the pdf (subscribers only)
Buy the pdf (non-subscribers)
Journal: Polymers and Polymer Composites
Issue Year: ppc
Volume: 15
Issue No: No.8
Abstract
Composites of wheat straw and, optionally, rice husk fibres with polymeric methylene diphenyl diisocyanate resin (pMDI) as a binder made by compression moulding (Type I particleboard) and composites of rice husk and polypropylene made by extrusion and injection moulding (Type II particleboard) were prepared and characterised by a range of methods. In Type I particleboard, the physical and mechanical properties improved with increasing binder content until an optimum level of binder content was reached. Particleboards made of wheat straw blended with 6% pMDI showed a maximum modulus of elasticity. Dimensional stability and water absorption of particle-boards made by combining wheat straw and rice husks were superior to those made only from wheat straw. In Type II particleboards, the nonpolar polypropylene had poor affinity with rice husk, resulting in poor interfacial adhesion and poor mechanical properties. The interfacial adhesion was improved by using trimethoxy(vinyl)silane as a coupling agent and maleic anhydride-grafted polypropylene (MAPP) as a compatibiliser. This allowed effective transfer of mechanical stress through boundary regions, as demonstrated by an improvement in the mechanical properties. The best impact strength result was achieved with a combination of 1.5 wt% silane and 5 wt% MAPP in all-rice husk composites. 17 refs.
Related reading
More journal reading and science coverage connected to this topic.
Curing residual strain monitoring of carbon fiber reinforced polymer composite using notched long-period fiber grating
Title: Curing residual strain monitoring of carbon fiber reinforced polymer composite using notched long-period fiber grating Page Range: p.27-34 Author(s): Ke-Ping Ma; Chao-Wei Wu;…
Mechanical properties of glass bead-modified polymer composite
Title: Mechanical properties of glass bead-modified polymer composite Page Range: p.35-44 Author(s): Tsung-Han Hsieh; Ming-Yuan Shen; Yau-Shian Huang; Qi-Qian He; Hsuan-Chih Chen File size:…
The effect of MBS toughening for mechanical properties of wood-plastic composites under environmental ageing
Title: The effect of MBS toughening for mechanical properties of wood-plastic composites under environmental ageing Page Range: p.45-58 Author(s): Chin-Hsing Chen; Chin-Lung Chiang; Wei-Jen…