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Accelerated hygrothermal aging of Talc/Cycloaliphatic epoxy composites
Author(s) -
Tomasi Julie M.,
Krieg Aaron S.,
Jensen Nicholas J.,
Miskioglu Ibrahim,
King Julia A.,
Odegard Gregory M.
Publication year - 2019
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.25131
Subject(s) - talc , materials science , composite material , epoxy , flexural strength , absorption of water , glass transition , relative humidity , composite number , stiffness , humidity , polymer , physics , thermodynamics
Cycloaliphatic epoxy (CE) systems are resistant to many aging mechanisms, which make them useful in applications with harsh environments. Reinforcement has been used in epoxy systems to decrease water absorption and improve aging resistance; thus, it is expected that talc would benefit CE systems in a similar manner. Neat, 10, and 20 wt% talc/CE composites were aged at 50 °C and 100% relative humidity for up to 398 hr. Three‐point bend testing and dynamic mechanical analysis were performed on the aged and unaged samples. Talc reduced the amount of water absorbed in the composites significantly, and increased the composite flexural stiffness at all aging levels. Talc does not appear to mitigate the negative effects of aging on flexural strength or glass transition temperature ( T g ). POLYM. COMPOS., 40:2946–2953, 2019. © 2018 Society of Plastics Engineers