Effect of maleated polypropylene as coupling agent for polypropylene composites reinforced with hemp strands

2006 ◽  
Vol 102 (1) ◽  
pp. 833-840 ◽  
Author(s):  
P. Mutjé ◽  
M. E. Vallejos ◽  
J. Gironès ◽  
F. Vilaseca ◽  
A. López ◽  
...  
Keyword(s):  
Coupling Agent ◽  
Polypropylene Composites ◽  
Maleated Polypropylene

Extruded Wood-Flour Polypropylene Composites: Effect of a Maleated Polypropylene Coupling Agent on Filler-Matrix Bonding and Properties

1990 ◽  
Vol 197 ◽  
Author(s):  
George E. Myers ◽  
Paul C. Kolosick ◽  
Ichwan S. Chahyadi ◽  
Camden A. Coberly ◽  
James A. Koutsky ◽  
...  
Keyword(s):  
Impact Energy ◽  
Coupling Agent ◽  
Wood Flour ◽  
Low Molecular Weight ◽  
Wood Veneer ◽  
Polypropylene Composites ◽  
Maleated Polypropylene ◽  
Bonding Area ◽  
Peel Force ◽  
Full Factorial

ABSTRACTFull factorial studies were conducted to determine the effects of a coupling agent (a low molecular weight maleated polypropylene (MAPP)) and other composition and processing variables on the mechanical properties of a wood-flour-filled polypropylene (PP) composite. Effects of MAPP on the bonding between PP and wood veneer were also examined. At less than 1 percent by weight, MAPP produced useful increases in strength and modulus properties of the composite, and this effect was somewhat enhanced by small-particle-size wood flour and multiple extrusions. However, MAPP caused small losses in notched impact energy. High extrusion temperature (190°C to 250°C) had little influence on strength, but it decreased notched impact energy. Peel force between PP and wood veneer was increased by pretreatment with MAPP for aspen, but not for birch, aspen being more porous than birch. The effectiveness of MAPP may therefore be related to its ability to penetrate the wood and form a strongly held hydrophobic layer that is attractive to the PP, thereby increasing both the effective bonding area and mechanical interlocking.

Simultaneous effects of coupling agent and flame retardant on empty fruit bunch fiber/polypropylene composites

2013 ◽  
Vol 32 (17) ◽  
pp. 1268-1284 ◽  
Author(s):  
Mohammad Dalour Hossen Beg ◽  
Siti Samahani ◽  
Md Forhad Mina ◽  
Rosli Mohammad Yunus
Keyword(s):  
Flame Retardant ◽  
Coupling Agent ◽  
Empty Fruit Bunch ◽  
Polypropylene Composites

scholarly journals Effect of Materials Content on Dimensional Stability, Nano Roughness and Interfaced Morphology for Virgin or Recycled Polypropylene Based Wood Composites

2021 ◽  
Author(s):  
Shamsul Haq
Keyword(s):  
Dimensional Stability ◽  
Coupling Agent ◽  
Processing Technique ◽  
Performance Ratio ◽  
Wood Composites ◽  
Polypropylene Composites ◽  
Price Performance ◽  
Environmental Footprints ◽  
Higher Dimensional ◽  
Recycled Plastics

The compositions of mango wood-polypropylene composites (WPCs) are formulated, with different compositions of virgin polypropylene (PP) or recycled PP, mango wood waste and a coupling agent. The compositions are fabricated via melt extrusion compounding pursued by injection hot molding. The tests of the prepared compositions are carried out for, water absorption, thickness swelling, surface properties at a nano-scale and interfaced morphology. Comparative study of WPCs composition has done on respective properties. All processing variable conditions are constant for different compositions. The recycled PP based wood composites with or without the coupling agent possessed superior properties in comparison to virgin PP based composites. FESEM images show that coupled composite is having the better bonding strength and smoothness along with a higher dimensional stability in comparison to none coupled composite. Future endeavor should be focused on optimizing the composition of reinforcement wood and recycled plastics matrix according to intended application. The quality of WPCs can also be improved with the co-ordination of latest development in technology and processing technique relevant to them. WPCs study supports “turning waste into something useful”. This provides the mileage in price performance ratio and also the product’s environmental footprints to be adjusted to suit the products application.

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.

MAgPP an Effective Coupling Agent in Rice Husk Flour Filled Polypropylene Composites

2007 ◽  
Vol 537-538 ◽  
pp. 137-144 ◽  
Author(s):  
György Czél ◽  
Zoltán Kanyok
Keyword(s):  
Rice Husk ◽  
Coupling Agent ◽  
Weak Coupling ◽  
Cellulosic Fibre ◽  
Effective Coupling ◽  
Polypropylene Composite ◽  
Filling Degree ◽  
Polypropylene Composites ◽  
Composite Systems ◽  
Rice Husk Flour

Different properties (tensile strength, elongation, modulus, impact strength) of rice husk (RH) reinforced polypropylene (PP) coupled by Maleic-Anhydride grafted Polypropylene (MAgPP) have been investigated. MAgPP is an effective coupling agent, not only in cellulosic-fibre filled polyolefine composites, but in rice husk flour filled polypropylene composite systems as well. It gives a utilizable construction polymer matrix composite (PMC) material even at a 40 wt.% RH filling degree. The strength and modulus increases by adding the rice husk but the elongation decreases in a non-monotonic way. Micrographs shows weak coupling in between RH and PP without MAgPP.

scholarly journals High-Yield Lignocellulosic Fibers from Date Palm Biomass as Reinforcement in Polypropylene Composites: Effect of Fiber Treatment on Composite Properties

Polymers ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1423
Author(s):  
Chihaoui Belgacem ◽  
Quim Tarres ◽  
Francesc Xavier Espinach ◽  
Pere Mutjé ◽  
Sami Boufi ◽  
...  
Keyword(s):  
Date Palm ◽  
Surface Composition ◽  
Alkali Treatment ◽  
Enzymatic Treatment ◽  
High Yield ◽  
Intrinsic Resistance ◽  
Chemical Surface ◽  
Polypropylene Composites ◽  
Maleated Polypropylene ◽  
Date Palm Fibers

In this work, date palm waste (DPW) stemming from the annual pruning of date palm was used as reinforcing filler in polypropylene (PP) matrix at 40% w/w. Three pre-treatment routes were performed for the DPW, namely (i) defibration, (ii) soft alkali treatment, and (iii) enzymatic treatment, to obtain date palm fibers (DPF) and to investigate the effect of each process on their chemical composition, which will ultimately affect the mechanical properties of the resulting composites. The enzymatic and alkali treatment, combined with maleated polypropylene (MAPP) as a coupling agent, resulted in a composite with higher strength and stiffness than the neat PP. The differences in the reinforcing effect were explained by the change in the morphology of DPF and their chemical surface composition according to the selected treatment of DPW. Enzymatic treatment maximized the tensile strength of the compound as a consequence of an improvement in the interfacial shear strength and the intrinsic resistance of the fibers.

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