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Effect of Melt Flow Index on the Impact Resistance, Dimensional Variation, and Mechanical Properties of Injection Molded Polycarbonate
Authors: Marc A. Huelsman; Geoffrey J. Frank; Kevin P. Roach; William R. Braisted; DAYTON UNIV OH RESEARCH INST |
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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)
| Limitations: |
 APPROVED FOR PUBLIC RELEASE |
| Description: |
Final rept. 1 Aug 92-1 May 93 |
| Pages: |
267 |
| Report Date: |
FEB 94 |
| Contract Number: |
F33616-92-C-3404 |
| Report Number: |
A264792 |
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