Melt extruded versus extrusion compression molded glass-polypropylene long fiber thermoplastic composites

Shailesh Alwekar; Pritesh Yeole; Vipin Kumar; Ahmed Arabi Hassen; Vlastimil Kunc; Uday K. Vaidya

doi:10.1016/j.compositesa.2021.106349

Melt extruded versus extrusion compression molded glass-polypropylene long fiber thermoplastic composites

Shailesh Alwekar, Pritesh Yeole, Vipin Kumar, Ahmed Arabi Hassen, Vlastimil Kunc, Uday K. Vaidya

Advanced Composites Manufacturing

Research output: Contribution to journal › Article › peer-review

23 Scopus citations

Abstract

Long fiber thermoplastic (LFT) composites are processed either with extrusion compression or fiber injection processes. The properties of LFT materials are highly influenced by processing techniques, which lead to different porosity contents, fiber length distributions, and fiber orientation distributions. It is important to understand the various LFT processing techniques and their effects on mechanical, thermal, and microscopic properties. This work considered LFT sheets processed via extrusion, which offers highly aligned fibers (referred to as “Tecnogor composites”), and LFT composites produced via extrusion compression molding (ECM), which offers a random distribution of fibers. Tecnogor composites exhibited higher flexural strength (35–65%), flexural modulus (132–172%), tensile strength (39–52%), tensile modulus (67–75%), and Izod impact resistance (195–220%) than the random LFT composites. This response was attributed to the aligned fibers in Tecnogor composites. Mathematical models including Halpin-Tsai and Lavengood-Goettler were used to predict and compare the Young's modulus of Tecnogor and ECM composites, respectively.

Original language	English
Article number	106349
Journal	Composites - Part A: Applied Science and Manufacturing
Volume	144
DOIs	https://doi.org/10.1016/j.compositesa.2021.106349
State	Published - May 2021

Funding

This study was funded in part by the Office of Energy Efficiency and Renewable Energy, US Department of Energy under Award Number DE-EE0006926. We gratefully acknowledge the Manufacturing Demonstration Facility, Oak Ridge National Laboratory, and Institute for Advanced Composites Manufacturing Innovation (IACMI), in Tennessee, USA for facilities and financial support. IACMI is a US manufacturing institute with a focus on applications that enhance the performance of advanced composites at reduced embodied energy and cost. The material support from Stephen A. Fore from American Renolit Corporation is gratefully acknowledged.

Keywords

A. Discontinuous reinforcement
C. Statistical properties/methods
D. Mechanical testing
D. Microstructural analysis

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10.1016/j.compositesa.2021.106349

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title = "Melt extruded versus extrusion compression molded glass-polypropylene long fiber thermoplastic composites",

abstract = "Long fiber thermoplastic (LFT) composites are processed either with extrusion compression or fiber injection processes. The properties of LFT materials are highly influenced by processing techniques, which lead to different porosity contents, fiber length distributions, and fiber orientation distributions. It is important to understand the various LFT processing techniques and their effects on mechanical, thermal, and microscopic properties. This work considered LFT sheets processed via extrusion, which offers highly aligned fibers (referred to as “Tecnogor composites”), and LFT composites produced via extrusion compression molding (ECM), which offers a random distribution of fibers. Tecnogor composites exhibited higher flexural strength (35–65%), flexural modulus (132–172%), tensile strength (39–52%), tensile modulus (67–75%), and Izod impact resistance (195–220%) than the random LFT composites. This response was attributed to the aligned fibers in Tecnogor composites. Mathematical models including Halpin-Tsai and Lavengood-Goettler were used to predict and compare the Young's modulus of Tecnogor and ECM composites, respectively.",

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author = "Shailesh Alwekar and Pritesh Yeole and Vipin Kumar and Hassen, {Ahmed Arabi} and Vlastimil Kunc and Vaidya, {Uday K.}",

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AU - Yeole, Pritesh

AU - Kumar, Vipin

AU - Hassen, Ahmed Arabi

AU - Kunc, Vlastimil

AU - Vaidya, Uday K.

PY - 2021/5

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N2 - Long fiber thermoplastic (LFT) composites are processed either with extrusion compression or fiber injection processes. The properties of LFT materials are highly influenced by processing techniques, which lead to different porosity contents, fiber length distributions, and fiber orientation distributions. It is important to understand the various LFT processing techniques and their effects on mechanical, thermal, and microscopic properties. This work considered LFT sheets processed via extrusion, which offers highly aligned fibers (referred to as “Tecnogor composites”), and LFT composites produced via extrusion compression molding (ECM), which offers a random distribution of fibers. Tecnogor composites exhibited higher flexural strength (35–65%), flexural modulus (132–172%), tensile strength (39–52%), tensile modulus (67–75%), and Izod impact resistance (195–220%) than the random LFT composites. This response was attributed to the aligned fibers in Tecnogor composites. Mathematical models including Halpin-Tsai and Lavengood-Goettler were used to predict and compare the Young's modulus of Tecnogor and ECM composites, respectively.

AB - Long fiber thermoplastic (LFT) composites are processed either with extrusion compression or fiber injection processes. The properties of LFT materials are highly influenced by processing techniques, which lead to different porosity contents, fiber length distributions, and fiber orientation distributions. It is important to understand the various LFT processing techniques and their effects on mechanical, thermal, and microscopic properties. This work considered LFT sheets processed via extrusion, which offers highly aligned fibers (referred to as “Tecnogor composites”), and LFT composites produced via extrusion compression molding (ECM), which offers a random distribution of fibers. Tecnogor composites exhibited higher flexural strength (35–65%), flexural modulus (132–172%), tensile strength (39–52%), tensile modulus (67–75%), and Izod impact resistance (195–220%) than the random LFT composites. This response was attributed to the aligned fibers in Tecnogor composites. Mathematical models including Halpin-Tsai and Lavengood-Goettler were used to predict and compare the Young's modulus of Tecnogor and ECM composites, respectively.

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Melt extruded versus extrusion compression molded glass-polypropylene long fiber thermoplastic composites

Abstract

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Keywords

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