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Dynamic mechanical study on unidirectional polyethylene fibers‐PMMA and glass fibers‐PMMA composite laminates
Author(s) -
Saha Nirmal,
Banerjee Amar Nath,
Mitra B. C.
Publication year - 1996
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19960502)60:5<657::aid-app2>3.0.co;2-p
Subject(s) - composite material , materials science , composite number , volume fraction , viscoelasticity , dynamic mechanical analysis , glass transition , polyethylene , glass fiber , methyl methacrylate , composite laminates , poly(methyl methacrylate) , softening point , synthetic fiber , volume (thermodynamics) , polymerization , fiber , polymer , physics , quantum mechanics
Unidirectional (UD) composite laminates based on glass fibers (GF) and high‐performance polyethylene fibers (PEF) were prepared with partially polymerized methyl methacrylate (MMA) at room temperature and then heated at 55°C (well below the softening point of PEF) for 2 hrs. The viscoelastic behavior of the composite was studied through dynamic mechanical analysis at different volume fractions of fibers. Several parameters such as storage modulus ( E′ ), loss modulus ( E″ ), and loss factor or damping efficiency (tan ∂) were determined to be between 40 and 160°C in a resonant frequency mode. All the properties were compared between the two composite laminates. It was found that the shift of the glass transition temperature ( T g ) due to incorporating fibers was higher in the case of a PEF‐reinforced composite than that of a GF‐reinforced composite at the same volume fraction of fibers. It was also observed that the efficiency of both the composites decreases with the increase in the volume fraction of fibers. © 1996 John Wiley & Sons, Inc.