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Ionic interphase of glass fiber/polyamide 6,6 composites
Author(s) -
SalehiMobarakeh Hamid,
Brisson Josée,
AitKadi Abdellatif
Publication year - 1998
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.10099
Subject(s) - materials science , composite material , fiber , glass transition , ultimate tensile strength , interphase , polymer , composite number , glass fiber , scanning electron microscope , wetting , polyamide , genetics , biology
Interfacial polymerization to polyamide 6, 6 followed by introduction of ionic groups was performed on the surface of short glass fibers. The ionic interphase‐modified fibers were used with poly(ethylene‐co‐methacrylic acid) (DuPont Surlyn) to prepare composites with specific fiber‐matrix interactions. Fiber treatment increased composite tensile and bending properties. An increase in the average fiber length was observed, which was attributed to a decrease in the fiber attrition during mixing. The effect of increasing temperature on the composite mechanical properties was studied. Different behavior was observed before and after the glass transition temperature, T g , of the matrix. The dynamic mechanical measurements showed an increase in the T g of the matrix after the treatments, which is attributed to a decrease in chain mobility at the interface resulting from increased interactions of the treated fiber surface with the polymer. Scanning electron microscopy of fractured composites after tensile tests revealed a smooth fiber surface with no polymer at the surface for the untreated composites. Adhered polymer was clearly observed on the surface of treated fibers, indicating better fiber wetting by the matrix. This improved adhesion was attributed to the grafted nylon molecules at the glass fiber surface.