Accession Number : ADA297462

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

Descriptive Note : Final rept. 1 Aug 92-1 May 93,

Corporate Author : DAYTON UNIV OH RESEARCH INST

Personal Author(s) : Huelsman, Marc A. ; Frank, Geoffrey J. ; Roach, Kevin P. ; Braisted, William R.

PDF Url : ADA297462

Report Date : FEB 1994

Pagination or Media Count : 267

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)

Descriptors :   *AIRCRAFT, *MANUFACTURING, *LAMINATES, *MELTS, *IMPACT STRENGTH, *PLASTICS, *POLYCARBONATES, *INJECTION MOLDING, TEST AND EVALUATION, STRESS STRAIN RELATIONS, FINITE ELEMENT ANALYSIS, TENSILE PROPERTIES, STRENGTH(MECHANICS), BIRD STRIKES, SHIELDING, INDEXES, ELONGATION, TENSILE TESTERS, TRANSPARENCIES, SHRINKAGE, MOLDING MATERIALS.

Subject Categories : Aircraft
      Laminates and Composite Materials
      Plastics
      Mfg & Industrial Eng & Control of Product Sys

Distribution Statement : APPROVED FOR PUBLIC RELEASE