The tensile deformation and failure behavior, dynamic mechanical proper ties and creep behavior of PACM-12 (DuPont, poly(bis 4-4' dicyclohexylmethane) n-dodecanediamide), a representative thermoplastic polymer for use as a matrix in ad vanced composites and as an engineering plastic, as a function of processing history are described. Although injection molded PACM-12 fails in a brittle fashion at room tempera ture, completely amorphous PACM-12 is ductile; the difference is attributed to variations in cooling in the interior of the samples due to sample thickness effects. Partially crystal line samples are brittle at room temperature, with all samples being ductile near and above Tg. A master creep curve for the partially crystalline samples can be obtained by horizontal shift alone.
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References
1.
Chen, A W-L , A. Miyase, P.H. Geil and S.S. Wang.1993 " Anelastic Deformation of a Thermoplastic-Matrix Fiber Composite at Elevated Temperature, Part I: Neat Resin Structure Characterization," J of Composite Materials , 27(9) 862-885.
2.
Miyase, A. , S.S. Wang, A W-L Chen and P.H. Geil1993. "Anelastic Deformation of a Thermoplastic-Matrix Fiber Composite at Elevated Temperature, Part III Structure and Thermomechanical Properties of AS4/PACM-12 Composite," J. of Composite Materials , 27(9).908-920
3.
Miyase, A. and S.S. Wang In preparation "Anelastic Deformation of a Thermoplastic-Matrix Fiber Composite at Elevated Temperatures, Part IV Transverse Creep"
4.
Miyase, A. and S.S. Wang In preparation "Anelastic Deformation of a Thermoplastic-Matrix Fiber Composite at Elevated Temperatures, Part V. Interlaminar Creep"
5.
Desoutter, P. and S.S. Wang To be published "Elevated Temperature Crack Growth and Fracture in a Thermoplastic Polymer," NCCMR 89-19, University of Illinois
6.
Desoutter, P. and S.S. Wang To be published. "Transverse Crack Growth and Fracture of a Thermoplastic Matrix Fiber Composite at Room and Elevated Temperature," NCCMR 89-20, University of Illinois.
7.
Miyase, A. , S.S. Wang and C. Roce.1991 "Cyclic Biaxial Fatigue Crack Growth in Thermoplastic Composite Materials," Proceedings of the American Society of Composites Technical Conference, VI, pp 703-712
8.
Chang, I.Y.1985 "Thermoplastic Matrix Continuous Filament Composites of Kevlar Aramid or Graphite Fiber," Composite Science and Technology , 24(1):61-79
9.
Su, K.B.1985 "Mechanisms of Interlaminar Fracture in a Thermoplastic Matrix Composite Laminate," Proceedings of 5th International Conference on Composite Materials, W C Harrigan Jr , J Strife and A K. Dhingra, eds , Warrendale, PA. TMS-AIME, pp 995-1006.
10.
Chang, I.Y.1986 "Thermoplastic Matrix Composites," Proceedings of Japan-US Conference on Composite Materials III, Composite '86 Recent Advances m Japan and the United States, K. Kawate, S Umekawa and A Kobayashi, eds., pp 615-622
11.
Wedgewood, A.R. , K.B. Su and J. Nairn1987 "Toughness Properties and Service Performance of High Temperature Thermoplastics and Their Composites ," The 19th International SAMPE Technical Conference , Nations Future Materials Needs, T. Lynch, J Perish, T Wolf and N Rupert, eds , 19 454-467.
12.
Nairn, J.A. and P. Zoller.1985 "Residual Thermal Stresses in Semicrystalline Thermoplastic," Proceedings of 5th International Conference on Composite Materials, W. C. Harrigan Jr., J. Strife and A. K. Dhingra, eds , TMS-AIME, Warrendale, PA, pp 931-946.
13.
Lee, W.J., B.K. Fukai, J.C. Seferis and I.Y. Chang.1988 "Crystallization and Processing Behavior of Polyamide J1 Polymer and Composites Reinforced with Kevlar Fiber, Composites, 19(6):473-480
14.
Musfeldt, J.L.1987 "Effect of Moisture Adsorption on the Glass Transition Temperature of J2 Polymer," senior thesis, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign (August).
15.
Chen, A.W.-L.1987. "Characterization of Thermoplastic Polyamide Composite Matrix Material," Ph D. thesis, Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign
16.
Ferry, J.D.1980Viscoelastic Properties of Polymers, NYJohn Wiley and Sons
17.
Pen, R W 1966 "Dynamic Mechanical Properties of Crystalline Linear Polyethylene," Journal of Polymer Science , Part A2, 4545-557
18.
Fukai, Y. , T. Sato, M. Ushirokawa, T. Asada and S. Onogi1970. "Rheo-Optical Studies of High Polymers XVII Time Temperature Superposition of Time Dependent Birefringent for High Density Polyethylene ," Journal of Polymer Science, A2, 81195-1209
19.
Nielsen, L.E.1969 "Creep and Dynamic Mechanical Properties of Filled Polyethylene," Transactions of the Society of Rheology, 13:145-166.
20.
Fukino, K., K. Senshu, T. Hirano and H. Kawai1962 "Tensile Stress Relaxation Behavior of Unplasticized Poly(Vinyl)Chloride ," Journal of Colloid Science, A2, 17726-732
21.
Crugnola, A. , M. Pegorano and F. Danusso.1968 " High Temperature Mechanical Behavior of Unplasticized Poly(Vinyl Chloride ," Journal of Polymer Science, Part A2, 6.1705-1722
22.
Nagamatsu, K. , T. Takemura, T. Yoshitomi and T. Takemoto.1958 " Effect of Crystallinity on the Viscoelastic Properties of Polyethylene," Journal of Polymer Science, 33:515-518
23.
Takemura, T.1959 "Theoretical Consideration of the Effect of Crystallinity on the Viscoelastic Properties of Polyethylene ," Journal of Polymer Science, 38:471-478.
24.
Williams, M.L. , R.F. Landel and J.D. Ferry.1955 " The Temperature Dependence of Relaxation Mechanisms in Amorphous Polymer and Other Glass-Forming Liquids ," Journal of American Chemical Society, 773701-3707
25.
Nielsen, L.E.1974Mechanical Properties of Polymers and CompositesNew York: Marcel Dekker
26.
Nielsen, L.E. and F.D. Stockton.1963 "Theory of Modulus of Crystalline Polymers," Journal of Polymer Science A, 1:1195-2002
27.
Tobolsky, A.V.1962 "Physics of Semicrystalline Polymers," Journal of Chemical Physics, 37:1139-1145
28.
McCrum, N.G., B.E. Read and G. Williams.1967Anelastic and Dielectric Effects in Polymeric Solids. London, England: Wiley.
29.
Nichols, M.E. , S.S. Wang and P.H. Geil.1990. " Creep and Physical Aging in a Polyamideimide Carbon Fiber Composite," Journal of Macromolecular Science (Physics), B29303-336.
30.
Dean, D., A. Miyase and P.H. Geil1992 "The Interaction of Creep and Physical Aging in a Semicrystalline Thermoplastic Matrix Composite above Tg," Journal of Thermoplastic Matrix Composites, 5.136-151.
