Abstract
Solid rubbers have been incorporated into thermosets using the compositional quenching process. Electron micrographs reveal that rubber particles a few micrometres or less in size have been dispersed in the matrix. Two model systems were studied: an epoxy resin cured with primary amines which represents a tight network structure, and a phenoxy resin cross-linked with methylene diisocyanate which represents a loose network. The present study indicates that a small amount of a cross-linking agent can reduce the degree of matrix yielding with a resultant drop in impact strength. SEM fractography provides complementary information on the transition from ductile fracture to brittle fracture.
Article PDF
Similar content being viewed by others
Explore related subjects
Discover the latest articles, news and stories from top researchers in related subjects.Avoid common mistakes on your manuscript.
References
E. B. Nauman, US Pat. No. 4594371 (1986).
N. P. Balsara andE. B. Nauman,Proc. ACS Div. Polym. Mater. 57 (1987) 637.
E. B. Nauman andN. P. Balsara,Fluid Phase Equilibria 45 (1988) 558.
M. V. Ariyapadi, J. Haus andE. B. Nauman,Proc. ACS Div. Polym. Mater. 61 (1989) 940.
M. V. Ariyapadi andE. B. Nauman,Polymer Preprint 30 (1989) 92.
E. B. Nauman et al, Chem. Engng Commun. 66 (1988) 29.
J. Furno andE. B. Nauman,Polymer, submitted.
S. Tirrel, MS thesis, Rensselaer Polytechnic Institute, Troy, NY (1988).
S. H. Liu andE. B. Nauman,J. Mater. Sci.
C. B. Bucknall, in “Toughened Plastics” (Applied Science, London, 1977) p. 183.
T. S. Chow,J. Mater. Sci. 15 (1980) 1873.
J. N. Sultan andF. J. McGarry,Polym. Engng Sci. 13 (1973) 29.
C. K. Riew, E. H. Rowe andA. R. Sibert, in “Toughness and Brittleness of Plastics”, Advances in Chemistry Series no. 154 (ACS Washington, DC, 1976).
G. E. Myers andJ. R. Dagon,J. Polym. Sci. A2 (1964) 2631.
N. H. Reinking, A. E. Barnabeo andW. F. Hale,J. Appl. Polym. Sci. 7 (1963) 2135.
Idem., ibid,7 (1963) 2145.
W. F. Hale, in “Encyclopedia of Polymer Engineering and Science”, Vol. 10 (Wiley, New York, 1968) p. 111.
G. Lubin (ed.) “Handbook of Composites” (Van Nostrand Reinhold, New York, 1982) p. 65.
J. I. Kroschwitz (ed.) in “Encyclopedia of Polymer Science and Engineering”, Vol. 6 (Wiley, New York, 1986) p. 345.
Polysar Taktene 1202 Manual, Polysar Limited, Sarnia, Ontario, Canada.
A. H. Jorgensen, L. A. Chandler andE. A. Collins,Rubber Chem. Technol. 46 (1973) 1087.
C. B. Bucknall andI. K. Partridge,Polymer Engng Sci. 26 (1986) 54.
R. A. Jerry, MSc thesis, Rensselaer Polytechnic Institute, Troy, NY (1987) p. 108.
R. J. Diefendorf andE. Tokarsky,Polym. Engng Sci. 15 (1975) 150.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Liu, S.H., Nauman, E.B. Effect of cross-linking density on the toughening mechanisms of rubber-modified thermosets. J Mater Sci 26, 6581–6590 (1991). https://doi.org/10.1007/BF02402649
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF02402649