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A High T(sub G) Pmr Polyimide Composites (Dmbz-15)
| AUTHOR | Nasa, National Aeronautics and Space Adm |
| PUBLISHER | Independently Published (09/26/2018) |
| PRODUCT TYPE | Paperback (Paperback) |
Description
A high T(sub g) thermosetting PMR-type polyimide, designated as DMBZ-15, was developed by replacing methylene dianline (MDA) in PMR-15 with 2,2'-dimethylbenzidine. Polyimide/carbon fiber (T650-35) composites were fabricated from a formulation of 3,3', 4,4'-benzophenonetetracarboxylic acid dimethyl ester (BTDE) and 2,2'-dimethylbenzidine (DMBZ), along with nadic ester (NE) as the endcap. DMBZ-15 displays a higher glass transition temperature (T(sub g) = 414 C) than PMR-15 (T(sub g) = 345 C), and thus retains better mechanical properties for brief exposure above 400 C. The physical properties and longterm thermo-oxidative stability of the DMBZ-15 polyimide/carbon fiber composites are also compared to that of PMR-15. Chuang, Kathy C. and Bowles, Kenneth J. and Papadopoulos, Demitrios S. and Hardy-Green, DeNise and Mccorkle, Linda Glenn Research Center
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Product Details
ISBN-13:
9781724077394
ISBN-10:
1724077392
Binding:
Paperback or Softback (Trade Paperback (Us))
Content Language:
English
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Page Count:
34
Carton Quantity:
120
Product Dimensions:
8.50 x 0.07 x 11.00 inches
Weight:
0.23 pound(s)
Country of Origin:
US
Subject Information
BISAC Categories
Science | Space Science - General
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A high T(sub g) thermosetting PMR-type polyimide, designated as DMBZ-15, was developed by replacing methylene dianline (MDA) in PMR-15 with 2,2'-dimethylbenzidine. Polyimide/carbon fiber (T650-35) composites were fabricated from a formulation of 3,3', 4,4'-benzophenonetetracarboxylic acid dimethyl ester (BTDE) and 2,2'-dimethylbenzidine (DMBZ), along with nadic ester (NE) as the endcap. DMBZ-15 displays a higher glass transition temperature (T(sub g) = 414 C) than PMR-15 (T(sub g) = 345 C), and thus retains better mechanical properties for brief exposure above 400 C. The physical properties and longterm thermo-oxidative stability of the DMBZ-15 polyimide/carbon fiber composites are also compared to that of PMR-15. Chuang, Kathy C. and Bowles, Kenneth J. and Papadopoulos, Demitrios S. and Hardy-Green, DeNise and Mccorkle, Linda Glenn Research Center
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