Preparation of N-Grafted Poly(p-phenyleneterephthalamide) and Applications to a Molecular Composite with Epoxy Resin

Abstract

To prepare the molecular composite of poly(p-phenylenetere-phthalamide) (PPTA) and epoxy resin (Epoxy), N-grafted PPTA (PPTA-g-Epoxy) was synthesized from PPTA and Epoxy via metalation of PPTA in a solution of sodium methylsulfinylcarbanion in dimethylsulfoxide. The Characterization of PPTA-g-Epoxy was carried out by IR, TGA, DSC, and X-ray diffraction. Molecular composites were prepared from PPTA-g-Epoxy of more than 100% grafting of Epoxy, epoxy resin and triethylenetetramine as a hardener. The bending modulus of 3.0 GPa and bending strength of 164 MPa were obtained for the molecular composite, and found superior to those of epoxy resin by factors of 1.66 and 1.36, respectively. The reasons for low reinforcing effect are discussed.

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Keywords

  • Poly(p-phenyleneterephthalamide)
  • Epoxy Resin
  • Molecular Composite
  • Graft Copolymer

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