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Effects of gasoline absorption on the tensile impact response of HDPE/Selar? laminar microlayer composites by D. E. Mouzakis; J. Karger-Kocsis is a Materials Science article available to read on EtoBox.

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The tensile impact performance of polymer/polymer microlayer composites (PPC) was studied before and after storage in unleaded fuel at an ambient temperature (RT) and at 040ЊC, respectively. The PPCs were produced by extrusion blow molding of high-density polyethylene (HDPE), d Å 0.945 g/cm 3 , blended with a modified polyamide (Selar TM RB 901 of DuPont) in 4, 7, and 14 wt %, respectively. It was shown that the fuel absorption obeys the Fickian law of diffusion. With increasing Selar content the sorption was reduced, whereas diffusion (D) and permeability (P) coefficients of the PPCs did not appear to change. The Selar microlayers worked as reinforcements, so that the strength and stiffness of the PPCs were increased, however, at the cost of the ductility and toughness. The exact opposite trends were observed due to fuel absorption. Gasoline, acting as plasticizer, resulted in reduced stiffness and strength with simultaneously increased ductility and toughness of the PPCs. All of the above-mentioned properties were similar for all blends after storage in gasoline. The failure mechanism of the PPCs was studied by fractography and is discussed in relation to the composite structure.

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Author

D. E. Mouzakis; J. Karger-Kocsis

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0021-8995)

Published

1998

Language

EN

Field

Materials Science (Physical Sciences)