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Effects of mold temperature and vacuum in resin transfer molding
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Date
2006
Author
Akgül, Eralp
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The purpose of this study was to investigate the effects of mold temperature, initial resin temperature, and the vacuum, applied at resin exit ports, on the mechanical properties of epoxy matrix woven glasss fiber reinforced composite specimens produced by Resin Transfer Molding (RTM). For this purpose, six different mold temperatures (25º, 40º, 60º, 80º, 100º, and 120ºC), two initial resin temperatures (15º and 28ºC), and vacuum (0.03 bar) and without vacuum (~1 bar) conditions were used. Specimens were characterized by using ultrasonic (C-Scan) inspection, mechanical tests (Tensile, Flexural, Impact), thermal analyses (Ignition Loss, TGA) and scanning electron microscopy (SEM). It was generally observed that mechanical properties of the specimens produced with a mold temperature of 60ºC were the best (e.g. 16%, 43%, and 26% higher tensile strength, Charpy impact toughness and flexural strength values, respectively). When vacuum was not applied, the percentage of “voids” increased leading to a decrease in mechanical properties such as 26% in Charpy impact toughness and 5% in tensile and flexural strength. Lower initial resin temperature also decreased mechanical properties (e.g. 14% in tensile strenght and 18% in Charpy impact toughness).
Subject Keywords
Polymers.
,
Plastics.
URI
http://etd.lib.metu.edu.tr/upload/2/12607952/index.pdf
https://hdl.handle.net/11511/16070
Collections
Graduate School of Natural and Applied Sciences, Thesis
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E. Akgül, “Effects of mold temperature and vacuum in resin transfer molding,” M.S. - Master of Science, Middle East Technical University, 2006.
