Development and characterization of orientation of anisotropic disk and fibrous particles in a thermoplastic matrix

1990 ◽  
Vol 34 (3) ◽  
pp. 343-366 ◽  
Author(s):  
Soon Ho Lim ◽  
James L. White
Keyword(s):  
Thermoplastic Matrix ◽  
Anisotropic Disk

scholarly journals Thermomechanical characterization of a low viscosity PA66 thermoplastic matrix and associated continuous glass fibre composite under processing conditions

2019 ◽  
Vol 53 (22) ◽  
pp. 3169-3186 ◽  
Author(s):  
Mael Péron ◽  
Frédéric Jacquemin ◽  
Pascal Casari ◽  
Gilles Orange ◽  
Jean-Luc Bailleul ◽  
...  
Keyword(s):  
Thermal Expansion ◽  
Fibre Composite ◽  
Thermomechanical Properties ◽  
Dynamic Mechanical ◽  
Low Viscosity ◽  
Thermoplastic Matrix ◽  
Dynamic Mechanical Analyser ◽  
Analytical Relations ◽  
Thermoplastic Resins

Characterizing the thermomechanical properties of thermoplastic resins and associated composites is of outmost importance to understand the development of process-induced stresses. To that extent, the characterization of a low viscosity PA66 matrix is proposed thanks to a homemade volumetric dilatometer named PvT-XT and a dynamic mechanical analyser on a wide temperature range. The PvT-XT results, reported for the first time, permit to identify the evolution of the coefficients of thermal expansion, of crystallization shrinkage and of the bulk modulus with temperature. Dynamic mechanical analyser experiments lead to the estimation of the Young’s modulus. The shear modulus as well as the Poisson’s ratio are then estimated thanks to analytical relations for isotropic and homogeneous materials. These properties are used to feed a new analytical model estimating the coefficients of thermal expansion of quasi-unidirectional composites. All the results are compared with the values from the literature or from complementary experiments, showing a good agreement which permits to validate the developed methodology.

scholarly journals Synthesis and Characterization of New Layered Double Hydroxide-Polyolefin Film Nanocomposites with Special Optical Properties

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3580 ◽  
Author(s):  
Fuensanta Monzó ◽  
Ana Caparrós ◽  
Diego Pérez-Pérez ◽  
Alejandro Arribas ◽  
Ramón Pamies
Keyword(s):  
Optical Properties ◽  
Mechanical Performance ◽  
X Ray Diffraction ◽  
X Ray ◽  
Whitening Agent ◽  
Thermoplastic Matrix ◽  
Double Hydroxide ◽  
Double Hydroxides ◽  
Film Nanocomposites

In this study, we have synthesized new double layered hydroxides to be incorporated to low density polyethylene thermoplastic matrix. These new composites present promising applications as materials to build greenhouses due to the enhancement of their optical properties. A characterization of the modified nanoclay has been performed by means of X-ray fluorescence (XRF), X-ray Diffraction (XRD), Thermogravimetric analysis (TGA), and Fourier-transform infrared spectroscopy (FTIR). We have prepared a series of polyolefin-based films to evaluate the effect of the addition of a whitening agent (disodium 2,2′-((1,1′-biphenyl)-4,4′-diyldivinylene)bis(benzenesulfonate)), the modified hydrotalcite-like material and a commercial dispersant. The rheological and mechanical characterization of the films have proved that the inclusion of the modified-layered double hydroxides (LDHs) do not substantially affect the processing and mechanical performance of the material. On the other hand, optical properties of the nanocomposites are improved by reducing the transmission in the UVA region.

Characterization of Metal Heating Elements for Resistance Welding of Thermoplastic Matrix Composites (PEEK)

2014 ◽  
Vol 797 ◽  
pp. 99-104
Author(s):  
Ignacio González ◽  
Alfredo Sanz ◽  
Antonio Fernandez
Keyword(s):  
Process Parameters ◽  
Welding Process ◽  
Resistance Welding ◽  
Matrix Composites ◽  
Metal Heating ◽  
Thermoplastic Matrix ◽  
Metallic Meshes

This article describes the analysis of the three types of heating metallic meshes used for the resistance welding process of thermoplastic matrix composites. The analysis of the heating that takes place in the mesh will carry to optimize the process parameters and to assure a correct joint and properties in the whole area.

Synthesis and characterization of extruded cellulosic fibrils for enhanced reinforced/filamentary textiles

2016 ◽  
Vol 88 (5) ◽  
pp. 520-531 ◽  
Author(s):  
Chukwuzubelu Ufodike ◽  
Sean Jackson ◽  
Nydeia Bolden ◽  
Tarik Dickens
Keyword(s):  
Extrusion Process ◽  
Mechanical Analysis ◽  
Heat Processing ◽  
Linear Arrangement ◽  
Fiber Properties ◽  
Extrusion Processing ◽  
Thermoplastic Matrix ◽  
Fiber Matrix ◽  
Micromechanics Modeling

Polystyrene matrixes containing cellulose nanofibril (CNF) with fiber content of 0.5, 1, 5, and 10 wt% were successfully hydrophobized by silylation and extruded into single filaments using both single and dual heat extrusion processing. The fiber–matrix bonding was examined using a scanning electron microscope. With further characterization, Fourier transform infrared spectroscopy showed a formation of Si-O-C bonds, indicating better fiber–matrix adhesion. Raman spectroscopy showed disruption of hydrogen bonding, which indicates interference of parallel nanocellulose fiber adhesion to neighboring fibrils. Thermogravimetric analysis suggests that the thermal stability of the functionalized CNF is higher than that of the corresponding neat sample, which is resultant of stable Si bond formation. Results from dynamic mechanical analysis showed an increasing ultimate tensile strength (UTS) and elastic modulus, with peak values attributed to the dual heat processing with up 112 MPa and 10.8 GPa for the UTS and modulus, respectively. The increase is assumed to be as a result of the linear arrangement of the CNF in the Polystyrene (PS) matrix during the extrusion process. Micromechanics modeling calculations suggest the increase is moving towards the fiber properties. The results revealed the strong reinforcing ability of CNFs and their compatibility with the thermoplastic matrix if functionalized.

Characterization of the interface between cellulosic fibers and a thermoplastic matrix

1994 ◽  
Vol 2 (6) ◽  
pp. 419-432 ◽  
Author(s):  
Feipeng P. Liu ◽  
Michael P. Wolcott ◽  
Douglas J. Gardner ◽  
Timothy G. Rials
Keyword(s):  
Cellulosic Fibers ◽  
Thermoplastic Matrix

scholarly journals Characterization of Mechanical Properties of CFRP Using Thermoplastic Matrix without Moisture Absorption

2016 ◽  
Vol 42 (5) ◽  
pp. 163-168
Author(s):  
Tomohiro YOKOZEKI ◽  
Yayoi KOBAYASHI ◽  
Hiroaki ARAI ◽  
Akio OTANI ◽  
Asami NAKAI ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Moisture Absorption ◽  
Thermoplastic Matrix
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