Study of dynamic mechanical properties and morphological behaviours of fly ash reinforced polypropylene composites

2011 ◽  
Vol 19 (4) ◽  
pp. 338-344 ◽  
Author(s):  
Dilip C. D. Nath ◽  
Sri Bandyopadhyay ◽  
John Rider ◽  
Aibing Yu ◽  
Darryl Blackburn ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Dynamic Mechanical Properties ◽  
Polypropylene Composites ◽  
Dynamic Mechanical

Dynamic mechanical properties of short sisal fibre reinforced polypropylene composites

2003 ◽  
Vol 34 (3) ◽  
pp. 275-290 ◽  
Author(s):  
P.V. Joseph ◽  
G. Mathew ◽  
K. Joseph ◽  
G. Groeninckx ◽  
S. Thomas
Keyword(s):  
Mechanical Properties ◽  
Dynamic Mechanical Properties ◽  
Sisal Fibre ◽  
Polypropylene Composites ◽  
Dynamic Mechanical

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.

scholarly journals Research on the Dynamic Mechanical Properties and Energy Dissipation of Expansive Soil Stabilized by Fly Ash and Lime

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Sheng-quan Zhou ◽  
Da-wei Zhou ◽  
Yong-fei Zhang ◽  
Wei-jian Wang ◽  
Dongwei Li
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Expansive Soil ◽  
Dynamic Mechanical Properties ◽  
Test Results ◽  
Absorbed Energy ◽  
Dynamic Mechanical ◽  
Stabilized Soil ◽  
Dynamic Compressive Strength

To probe into the dynamic mechanical properties of expansive soil stabilized by fly ash and lime under impact load, the split-Hopkinson pressure bar (SHPB) test was carried out in this study. An analysis was made on the dynamic mechanical property and final fracture morphology of stabilized soil, and the failure mechanism was also explored from the perspective of energy dissipation. According to the test results, under the impact pressure of 0.2 MPa, plain soil and pure fly ash-stabilized soil exhibit strong plasticity. After the addition of lime, the stabilized soil shows obvious brittle failure. The dynamic compressive strength and absorbed energy of stabilized soil first increase and then decrease with the change of mix proportions. Both the dynamic compressive strength and the absorbed energy reach the peak value at the content of 20% fly ash and 5% lime (20% F + 5% L). In the process of the test, most of the incident energy is reflected back to the incident bar. The absorbed energy of stabilized soil increases linearly with the rise of dynamic compressive strength, while the absorbed energy is negatively correlated with the fractal dimension. The fractal dimension of pore morphology of the plain soil is lower than that of the fly ash-lime combined stabilized soil when it comes to the two different magnification ratios. The test results indicate that the modifier content of 20% F + 5% L can significantly improve the dynamic mechanical properties of the expansive soil.

scholarly journals Polypropylene Composites Reinforced with Biodegraded Sugarcane Bagasse Fibers: Static and Dynamic Mechanical Properties

2016 ◽  
Vol 19 (1) ◽  
pp. 75-83 ◽  
Author(s):  
Sandra Maria da Luz ◽  
Sirlene Maria da Costa ◽  
Adilson Roberto Gonçalves ◽  
Antônio Pascoal Del'Arco Junior ◽  
Silgia Aparecida da Costa
Keyword(s):  
Mechanical Properties ◽  
Sugarcane Bagasse ◽  
Dynamic Mechanical Properties ◽  
Polypropylene Composites ◽  
Dynamic Mechanical

Study of effect of wood-flour content on mechanical, thermal, rheological properties and thermoformability of wood-polypropylene composites

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Deepti Marathe ◽  
Hemant Joshi ◽  
Pratiksha Kambli ◽  
Pramod Joshi
Keyword(s):  
Mechanical Properties ◽  
Rheological Properties ◽  
Wood Flour ◽  
Thickness Distribution ◽  
Flexural Modulus ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Small Amplitude Oscillatory Shear ◽  
Polypropylene Composites ◽  
Dynamic Mechanical

Abstract Wood plastic composites (WPC) were made from polypropylene (PP), impact copolymer (ICP) and wood flour (WF) by varying the WF content from 10 to 40% with PP grafted maleic anhydride as a coupling agent. The effect of varying WF content was studied on rheological, thermal, mechanical properties and dynamic mechanical properties. Experimental small amplitude oscillatory shear (SAOS) data was compared with the Einstein–Batchelor and empirical Krieger–Dougherty relations. Significant dependence of mechanical and rheological properties on WF content was observed. Young’s modulus, flexural modulus and dynamic shear viscosity increased with WF content. Results of dynamic mechanical analysis (DMA) showed increase in storage modulus with WF content. Three millimeter thick compression molded composites sheets were thermoformed using axisymmetric molds with two draw depths. Sag observed visually during thermoforming decreased with increasing WF content. Components made from the composites showed close to uniform thickness distribution as compared to those from ICP.

Static and Dynamic Mechanical Properties of Vinylester Resin Matrix Composites Filled with Fly Ash

2006 ◽  
Vol 291 (7) ◽  
pp. 784-792 ◽  
Author(s):  
Dipa Ray ◽  
Debadrita Bhattacharya ◽  
Amar K. Mohanty ◽  
Lawrence T. Drzal ◽  
Manjusri Misra
Keyword(s):  
Mechanical Properties ◽  
Fly Ash ◽  
Dynamic Mechanical Properties ◽  
Resin Matrix ◽  
Matrix Composites ◽  
Vinylester Resin ◽  
Dynamic Mechanical
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