Fracture surfaces of two-phase acrylic polymers were examined by reflected light microscopy. In two materials, detailed features were observed which resembled ones previously reported for poly (methyl methacrylate). In addition, a granular microstructure was noted. A material that fractured intergranularly had a lower tensile strength than one that fractured transgranularly.
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References
1.
Andrews, E.H. : Fracture in Polymers, New York: American Elsevier, 1968 , pp 177-198.
2.
Helmcke, J.G. : Licht-und elektronenmikroskopische Untersuchungen uber die Struktur von schnellhartenden Kunststoffen fur zahnarztliche Zwecke , Dtsch Zahnaerztl Z23: 1269-1277, 1955 .
3.
Helmcke, J.G. : Licht-und elektronenmikroskopische Untersuchungen uber die Struktur von schnellhartenden Kunststoffen fur zahnarztliche Zwecke , Dtsch Zahnaerztl Z24: 1885-1890, 1955 .
Kusy, R.P., and Turner, D.T.: Intergranular Cracking of a Weak 2-Phase Polymethyl Methacrylate, J Biomed Mater Res, in press.
10.
Kusy, R.P., and Turner, D.T.: Characterization of the Microstructure of a Cold-Cured Acrylic Resin , J Dent Res, in press.
11.
Wolock, I.; Kies, J.A.; and NEWMAN, S.B.; Fracture Phenomena in Polymers, in Averbach, B.L.; Felbeck, D.K.; Hahn, G.T.; and Thomas, D.A. (eds) : Fracture, New York: John Wiley & Sons, Inc., 1959, pp 250-264.
12.
Zandman, F.: Etude de la Deformation et de la Rupture des Matieres Plastiques, Paris: Publications Scientifiques et Techniques du Ministere de l'Air, 1954.
13.
Beardmore, P. , and Fellers, J.: Characteristic Fracture Features of Polymethyl Methacrylate, Mater Sci Eng5: 120-125, 1969/70.
14.
Kies, J.A.; Sullivan, A.M.; and Irvin, G.R.: Interpretation of Fracture Markings, J Appl Physics21:716-720, 1950.
15.
Newman, S.B., and Wolock, I.: Microscopy of Color Phenomena in Polymer Fracture, in Wiess, P. (ed) : Adhesion and Cohesion , Amsterdam: Elsevier Publishing Co., 1962, pp 218-239.
16.
Kusy, R.P., and Turner, D.T.: Influence of Internal Stress on the Strength of a Cold-Cured Acrylic Resin , J Dent Res53: 506, 1974.
17.
Moskowitz, H.D., and Turner, D.T.: Fractography of a Styrene-Acrylonitrile Copolymer-Microcracks and Ribbed Structure, J Mater Res, in press.
18.
Cook, J., and Gordon, J.E.: A Mechanism for the Control of Crack Propagation in All-Brittle Systems , Proc R Soc LondA282: 508-520, 1964.
19.
Geraghty, P.A. : Use of Polymethyl Methacrylate Reinforced with a Micro-Rubber Phase as a Prosthetic Denture Base, MS thesis, Drexel University, 1972.
