Graphite Fiber/Polyimide Composites with Improved Processability

1993 ◽  
Vol 305 ◽  
Author(s):  
Peter Delvigs ◽  
David L. Klopotek ◽  
Paul J. Cavano
Keyword(s):  
Glass Transition ◽  
Dimethyl Ester ◽  
Thermomechanical Properties ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Graphite Fiber ◽  
Thermooxidative Stability ◽  
Polyimide Composites ◽  
Polyimide Matrix ◽  
Monomethyl Ester

AbstractIn an effort to improve the processing characteristics of addition-type polyimide matrix resins, the use of flexibilized three-ring and four-ring aryl diamines was investigated. A series of fourteen diamines containing carbonyl and methylene, as well as thio connecting groups was synthesized. The diamines were polymerized with the dimethyl ester of 3,3,′4,4′-benzophenonetetracarboxylic acid, using the monomethyl ester of nadic acid as an end cap. The effect of diamine structure on the solubility and rheological properties during cure, as well as glass transition temperature and thermooxidative stability of neat resins was determined. Graphite fiber-reinforced composites were fabricated from selected resin formulations, and composite thermomechanical properties were investigated.

Design and Fabrication of Automotive Components in Graphite Fiber-Reinforced Composites

1979 ◽  
Author(s):  
R. E. Bonnett ◽  
H. Kulkarni ◽  
H. Kulkarni ◽  
G. Lim ◽  
P. Beardmore ◽  
...  
Keyword(s):  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Graphite Fiber ◽  
Fiber Reinforced ◽  
Automotive Components

Thermomechanical Characteristics of Compacted and Non-Compacted Plain Weave Woven Laminated Composites

2017 ◽  
Author(s):  
Maryam H. Al Kuwaiti ◽  
Abdel-Hamid I. Mourad
Keyword(s):  
Laminated Composites ◽  
Industrial Applications ◽  
Thermomechanical Properties ◽  
Pressure Vessels ◽  
Fiber Reinforced Composites ◽  
Reinforced Composites ◽  
Plain Weave ◽  
Thermomechanical Characteristics ◽  
Insignificant Difference ◽  
Bagging Method

Nowadays, fiber reinforced composites are widely used in variety of industrial applications such as aircraft structures, automotive, pressure vessels and piping, etc. Aircraft standard fabrication process requires certain level of vacuum compaction (debulking) during the lay-up process, and a standard bagging method for curing in an autoclave. Every compacted component cured in an autoclave needs to be vacuum bagged employing edge breathers or bleeders and surface breathers. This process is repetitive and time consuming, and therefore needs further investigation. In this research, the combined effect of the removal of compaction and edge breathing on the thermomechanical behavior of plain weave woven laminated composites is studied. Tests have been conducted on 12 lamina plain weave composite specimens. Results indicated an insignificant difference on the thermomechanical properties between compacted and non-compacted specimens. Tensile, ILSS, flexural and DSC tests confirm that for the 12 lamina specimens compaction and edge breathing are not needed.

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