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Effects of carbon fiber type and resin ratio on thermal and mechanical lifetime of polyetherimide composites
Author(s) -
Tatlıdilli Anıl,
Çetin Altındal Damla,
Gümüşderelioğlu Menemşe
Publication year - 2021
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.26025
Subject(s) - polyetherimide , materials science , composite material , composite number , ultimate tensile strength , thermal stability , modulus , isothermal process , fiber , stiffness , polymer , thermodynamics , physics , quantum mechanics
Abstract The aim of this study is to develop and characterize carbon fiber (CF)‐reinforced polyetherimide (PEI) composite materials that can be used in aerospace and defense industries. Four different composite materials with 60/40 and 40/60 resin/fiber weight ratios were prepared by hand lay‐up using unidirectional (UD) CFs and TWILL CFs. It was determined that, the thermal stability of composite materials is independent of CFs. PEI resin and composite materials soften above 200°C and decompose above 500°C. Also, PEI resin did not lose mass in 10 years under isothermal conditions at 25°C, and it is estimated that it loses 3 × 10 −8 % of its mass after 10 years at 100°C. Mechanical analysis showed that, tensile strength and Young's modulus of UD CF‐reinforced composite materials were ~ 3 times higher than that of the TWILL CF‐reinforced ones. The mechanical service lifetime studies under 10 MPa load at 100°C showed that, only 30–50% of mechanical properties of composite materials are lost in 10 years. Although, the thermal and mechanical aging studies were carried out under more challenging conditions, these composite structures showed strong mechanical and thermal behaviors. In conclusion, all composites, especially PEI‐UD60, are promising to use in ammunition body, wings, and fins where excellent tensile strength, high stiffness, lightness, thermal stability, and renewability are desired requirements.