Effect of Melt Flow Index on the Impact Resistance, Dimensional Variation, and Mechanical Properties of Injection Molded Polycarbonate.

Abstract

Recent advances in manufacturing technologies permit the production of large plastic components by injection molding. The techniques required to manufacture aircraft transparencies by injection molding are currently being developed as part of the Frameless Transparency Program. To evaluate the effect of melt flow index (MFI) on the behavior of injection molded material, panels were molded from Dow Calibre 300 resin with various MFIs. Some of the panels were dimensionally mapped to evaluate the effects of MFI variation on shrinkage. Tensile tests performed on coupons cut from the panels were used to evaluate the effect of MFI variation on strength and elongation. Birdstrike tests on the panels were used to evaluate the effect of NFI variation on impact resistance. Results and conclusions of the test programs are presented. (MM)

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 1994
Accession Number
ADA297462

Entities

People

  • Geoffrey J. Frank
  • Kevin P. Roach
  • Marc A. Huelsman
  • William R. Braisted

Organizations

  • University of Dayton

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  • Advanced Electronics
  • Air Platforms
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DTIC Thesaurus Topics

  • Cameras
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  • Mechanical Properties
  • Mechanics
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  • Stress Strain Relations
  • Tensile Strength
  • Test And Evaluation
  • Three Dimensional
  • Two Dimensional
  • Yield Strength

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