Effects of wheat straw fiber content and characteristics, and coupling agent concentration on the mechanical properties of wheat straw fiber-polypropylene composites

2009 ◽  
Vol 113 (2) ◽  
pp. 1000-1007 ◽  
Author(s):  
Ming-Zhu Pan ◽  
Ding-Guo Zhou ◽  
Mosto Bousmina ◽  
S. Y. Zhang
Keyword(s):  
Mechanical Properties ◽  
Wheat Straw ◽  
Coupling Agent ◽  
Fiber Content ◽  
Polypropylene Composites

Dynamic Mechanical Properties of Grafted Polypropylene Composites Reinforced with Acetylated Wheat Straw Fibers

2015 ◽  
Vol 1767 ◽  
pp. 139-143
Author(s):  
Ramón Sánchez ◽  
Jacobo Aguilar ◽  
Silvia Y. Martínez ◽  
Reyes J. Sanjuan ◽  
Gerardo A. Mejía ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Wheat Straw ◽  
Coupling Agent ◽  
Optical Microscope ◽  
Dynamic Mechanical Properties ◽  
Particle Sizes ◽  
Polypropylene Composites ◽  
Dynamic Mechanical ◽  
Twin Screw ◽  
Composite Pellets

ABSTRACTDynamic mechanical properties of polypropylene (PP) and grafted polypropylene (PP-g-MA) composites reinforced with acetylated wheat straw fibers (WSF) is reported in this work. The materials were prepared with different fiber particle sizes (40, 80 and 140 U.S. mesh) and at different fiber contents (5, 10 and 15 wt.%). The PP and PP-g-MA composites, where anhydride maleic (MA) was used as coupling agent, were obtained using a twin-screw extruder; whereas an injection-molding machine molded the composite pellets into testing specimens. To observe the morphology of the composites, micrographs were taken with an optical microscope. The Dynamic mechanical properties were analyzed using a torsional rheometer. The morphological analysis showed a high porous structure somehow similar to foamed materials. The storage modulus (G′) increased by increasing the fiber content, and decreased with fiber particle sizes for the PP composites. Meanwhile, the use of the coupling agent additive promoted a modulus increase due to higher fiber-polymer interaction, from better adhesion and chemical bonds formation between the fibers-coupling agent-PP.

Study on Ramie Fiber Reinforced Polypropylene Composites (RF-PP) and its Mechanical Properties

2008 ◽  
Vol 41-42 ◽  
pp. 313-316 ◽  
Author(s):  
Li Ping He ◽  
Yong Tian ◽  
Lu Lin Wang
Keyword(s):  
Mechanical Properties ◽  
Fiber Length ◽  
Fiber Content ◽  
Ramie Fiber ◽  
Fiber Reinforced ◽  
Polypropylene Composites ◽  
Environmental Friendly ◽  
Pp Composites ◽  
Pre Treatment ◽  
The Impact

Natural fiber reinforced polypropylene composites (NF/PP) have attracted a lot of attention because of their light weight, good mechanical properties, recyclable and environmental friendly features. This work has successfully fabricated ramie fiber reinforced polypropylene composites (RF/PP) with a hybrid method of melt-blending and injection molding. Different RF/PP eco-materials have been fabricated by varying the fiber length, fiber content and way of fiber pre-treatment. This paper studied the mechanical properties of the fabricated RF/PP composites in depth by investigating the mechanical behaviors of RF/PP and microstructures of the ruptured surfaces. The results show that the increases of fiber length and fiber content can improve the tensile strength, flexural strength and compression strength apparently, but result in negative influences on the impact strength and elongation behaviors of RF/PP composites. The optimal addition amount of ramie fiber is around 20 wt%. The pre-treatment of ramie fiber in 10%~15% NaOH is good to the mechanical properties of RF/PP. The fiber length can be varied in the range of 3-8 mm. It is expected that the fabricated RF/PP composites can be applied to automobile industry as environmental friendly eco-materials.

Effect of Coupling Agents on the Mechanical Properties of Wheat Straw Flour and Polyethylene Composites

2011 ◽  
Vol 383-390 ◽  
pp. 3145-3150 ◽  
Author(s):  
Hong Zhen Cai ◽  
Wei Ming Yi ◽  
Xue Yuan Bai
Keyword(s):  
Mechanical Properties ◽  
Wheat Straw ◽  
Coupling Agent ◽  
Coupling Agents ◽  
Polyethylene Composites

The possibility of using coupling agents for crosslinking composites of wheat straw flour and polyethylene was investigated. The wheat straw flour /polyethylene composites were produced by means of extrusion in order to determine the influence of coupling agent on the mechanical properties of the composites.

Effect of a Novel Coupling Agent, Polybutadiene Isocyanate, on Mechanical Properties of Wood-Fiber Polypropylene Composites

2008 ◽  
Vol 27 (16-17) ◽  
pp. 1679-1687 ◽  
Author(s):  
Amir Nourbakhsh ◽  
Bouhuslav V. Kokta ◽  
Alireza Ashori ◽  
Ahmad Jahan-Latibari
Keyword(s):  
Mechanical Properties ◽  
Coupling Agent ◽  
Wood Fiber ◽  
Polypropylene Composites

scholarly journals Mechanical Properties of Green Recycled Polypropylene Composites: Effect of Maleic Anhydride Grafted Polypropylene (MAPP) Coupling Agent

2013 ◽  
Vol 812 ◽  
pp. 187-191 ◽  
Author(s):  
Nur Izzati Zulkifli ◽  
Noorasikin Samat
Keyword(s):  
Mechanical Properties ◽  
Maleic Anhydride ◽  
Coupling Agent ◽  
Filler Content ◽  
Mechanical Analysis ◽  
Morphological Properties ◽  
Appreciable Change ◽  
Polypropylene Composites ◽  
Recycled Polypropylene ◽  
Tensile Impact

Recycled polypropylene/microcrystalline cellulose (rPP/MCC) composites were prepared by adding different loadings of maleic anhydride grafted polypropylene (MAPP) coupling agent. The tensile, impact and morphological properties of the composites were investigated. The obtained results show that the tensile and impact strengths of the composites were significantly enhanced with the addition of MAPP loading from 2 to 5 wt%, as compared with unfilled rPP/MCC composites. However, it was found that at low filler content, different amounts of MAPP resulted in no appreciable change in the tensile strength and modulus. Moreover, dynamic mechanical analysis (DMA) results indicated that, increasing the amount of MAPP loading from 2 to 5 wt% in rPP/MCC provide better stiffness of the composite compared to those neat rPP and neat PP. Field emission scanning microscopy (FESEM) has shown that the composite, with MAPP loading, promotes better fibermatrix interaction.

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