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Evaluation of Durability for Glass fabric/Phenolic Composites under Salt Water Environment  

Yoon, Sung-Ho (금오공과대학교 기계공학부)
Publication Information
Composites Research / v.18, no.4, 2005 , pp. 27-34 More about this Journal
Abstract
Salt water spray and immersion tests were experimentally conducted for over 6 months to investigate the durability of glass fabric/phenolic composites under salt water environment. Mechanical properties such as tensile properties, flexural properties, and shear properties were evaluated and thermal analysis properties such as storage shear modulus, loss shear moduls, and tan 6 were obtained through a DMA. A change in chemical structures was analyzed through a FTIR. According to the results, mechanical properties and thermal analysis properties were sensitive to salt water environment and these properties began to degrade in increasing in exposure times. However, tensile and flexural moduli started to decrease and then slightly increase as increasing in exposure times due to plasticization and crosslinking in matrix as well as physical swelling in composites. Beyond a certain exposure times, these properties began to decrease as further increasing in exposure times. Also the shape and location of peaks in FTIR curves were insensitive to exposure times, but the intensity of peaks would be. finally we found that the durability of glass fabric/phenolic composites were affected on salt water immersion environment rather than salt water spray environment.
Keywords
glass fabric/phenolic composites; salt water spray test; salt water immersion test; mechanical properties; thermal analysis properties; chemical structure;
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