Abstract
The mechanical properties and their dependence on electron beam irradiation were studied for high molecular weight diacetylene-containing thermoplastics: poly(octa-3,5-diynylene sebactate) and poly(hexa-2,4-diynylene sebacate). The tensile strength of the polymers goes through a maximum reaching 330 MPa (with irradiation dose of 0.2 Mrad) for the former and 129 MPa (1 Mrad) for the latter in the case of oriented samples. Further irradiation of the samples leads to decrease in tensile strength, an increase in Young’s moduli and decrease in the strain at break. FT-IR spectroscopy of the samples showed that even at 15 Mrad, when tensile strength drops by several times, compared to unirradiated samples, irradiated samples still contain many unreacted diacetylenic groups. Data from thermal mechanical analysis showed that irradiation by 1 Mrad already leads to loss of the thermoplastic properties of material due to polydiacetylene network formation.
Similar content being viewed by others
Article PDF
References
A. Hay, J. Org. Chem., 25, 1275 (1960).
A. Newkirk, A. Hay, and R. McDonald, J. Polym. Sci., Polym. Chem. Ed., 2, 2217 (1964).
H. Beckman and M. Rubner, Polymer, 32, 1821 (1991).
E. Kwock, T. Braid, Jr., and T. Miller, Macromolecules, 26, 2935 (1993).
S. Fomine and T. Ogawa, Polym. J., 26, 95 (1994).
S. Fomin, R. Neyra, and T. Ogawa, Polym. J., 26, 845 (1994).
G. Wegner, Makromol. Chem., 134, 219 (1970).
S. Kuhling, H. Keul, and H. Hocker, Makromolecules, 23, 4192 (1990).
J. Brandrup and E. Immergut, Ed., “Polymer Handbook,” 3rd ed., John Wiley & Sons, New York, N.Y., 1989.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Fomin, S., Maciel, A. & Ogawa, T. Diacetylene-Containing Polymers VI. Effect of Electron Beam on Mechanical Properties of Poly(octa-3,5-diynylene sebacate) and Poly(hexa-2,4-diynylene sebacate). Polym J 26, 1270–1276 (1994). https://doi.org/10.1295/polymj.26.1270
Issue Date:
DOI: https://doi.org/10.1295/polymj.26.1270
Keywords
This article is cited by
-
Novel hyperbranched molecules containing pyrrole units from diacetylene compounds
Polymer Bulletin (2010)