Discussed are the results of several approaches recently considered for im proving the interfacial adhesion of LaRC-TPI/graphite composites. Two approaches were investigated, namely altering the matrix and altering the fiber. As a result, three types of LaRC-TPI laminates were produced: amorphous/AS-4, amorphous/XAS, and semicrystal line/AS-4. The laminates were characterized using the transverse tensile test, scanning electron microscopy, optical microscopy, and thermal analysis.
References
1.
Muzzy, J.D.1988. "Processing of Advanced Thermoplastic Composites,"Proceedings of Manufacturing International '88. The Manufacturing Science of Composites, T. G. Gutowski, ed., ASME, New York, NY, 4.27-39.
2.
Throne, J.L. and M.S. Sohn.1990. "Electrostatic Dry Powder Prepregging of Carbon Fiber,"Proceedings of the 35th International SAMPE Symposium, G. Janicki, V. Bailey, H. Schjelderup, eds., SAMPE, Covma, CA, pp. 2086-2101.
3.
Edie, D.D. , G.C. Lickfield, M.J. Drews, M.S. Ellison, L.E. Allen, J.R. McCollum and H.L. Thomas.1988"Thermoplastic Coating of Carbon Fibers: Annual Report 1987-1988," NASA Research Grant NAS-1-680
4.
Baucom, R.A. and J.M. Marchello1990. "LaRC Powder Prepreg System," in Proceedings of the 35th International SAMPE Symposium, G Jamcki, V. Bailey, H Schjelderup, eds , SAMPE, Covina, CA, pp 175-187.
5.
Baucom, R., J. Marchello and J. Throne1990"Recent Developments in Dry Powder Processing," in Fiber-Tex 1989: The Third Conference on Advanced Engineering Fibers and Textile Structures for Composites , J D. Buckley, ed., NASA CP 3082, pp. 235-245.
6.
Muzzy, J. , B. Varughese, V. Thammongkol and W. Tincher.1989"Electrostatic Prepregging of Thermoplastic Matrices,"SAMPE Journal, 25(5):15-21
7.
Ogden, A.L., M.W. Hyer, J.T. Muellerleile, G.L. Wilkes and A.C. Loos1990"The Development of an Alternative Thermoplastic Powder Prepregging Technique," in Proceedings of the American Society for Composites Fifth Technical Conference: Composite Materials in Transition , Lancaster, PA Technomic Publishing Inc , pp. 249-259
8.
Bascom, W.D.1987"Interfacial Adhesion of Carbon Fibers"NASA CR178306.
9.
St. Clair, A.K. and T.L. St Clair.1981. "A Multi-Purpose Thermoplastic Polyimide,"SAMPE Quarterly , 13(1).20-25.
10.
Ohta, M., S. Tamai, T.W. Towell, N.J. Johnston and T.L. St. Clair.1990. "Improved Melt Flow and Physical Properties of Mitsui Toatsu's LaRC-TPI #1500 Series Polyimide," in Proceedings of the 35th International SAMPE Symposium, G Jamcki, V. Bailey, H. Schjelderup, eds., SAMPE, Covma, CA, pp 1030-1044.
11.
Hou, T.H. and J.M. Bai.1990. "Characterization of LaRC-TPI 1500 Powders-A New Version with Controlled Molecular Weight," in Proceedings of the 35th International SAMPE Symposium, G. Janicki, V Bailey and H. Schjelderup, eds , SAMPE, Covina, CA, pp. 1594-1608.
12.
Hou, T.H., J.M. Bai and T.L. St. Clair.1987. "A DSC Study on Crystalline LaRC-TPI Powder—A New Version with Higher Initial Molecular Weight,"SAMPE Quarterly, 18(4):20-24.
13.
Hou, T.H., N.T. Wakelyn and T.L. St. Clair.1988. "Investigation of Crystalline Changes in LaRC-TPI Powders,"Journal of Applied Polymer Science , 36. 1731- 1739.
14.
Muellerleile, J.T. and G.L. Wilkes1990. "Preliminary Results for Crystallization Behavior of LaRC-TPI and CPI Thermoplastic Polyimides as Induced from the Glassy State,"Polymer Preprints , 31(2):637
15.
Johnston, N.J. , T.L. St. Clair, R.M. Baucom and T.W. Towell.1989"Polyimide Matrix Composites : Polymidesulfone/LaRC TPI (1:1) Blend," in Proceedings of the 34th International SAMPE Symposium , G. A Zakrzewski, D. Mazenko, S T. Peters and C D. Dean, eds., SAMPE , Covina, CA, pp. 976-987
16.
Olson, S.H.1990. "Manufacturing with Comingled Yarns, Fabrics and Powder Prepreg Thermoplastic Composite Materials," in Proceedings of the 35th International SAMPE Symposium, G. Janicki, V. Bailey and H. Schjelderup, eds., SAMPE, Covina, CA, pp. 1306-1320.
17.
Clemans, S. and T. Hartness.1989. "Thermoplastic Prepreg Technology for High Performance Composites,"SAMPE Quarterly , 20(4).38-42.
