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Carboxy-telechelic polyolefin prepolymers were synthesized via ring-opening metathesis polymerization of 3-ethyl-1-cyclooctene in the presence of maleic acid. Following hydrogenation these difunctional prepolymers were cross-linked with a trifunctional aziridine in the presence of fumed silica or carbon black fillers to yield polyolefin elastomers with significantly enhanced mechanical properties as compared to the unfilled versions. The tensile strength, modulus, and tear strength of the elastomers can be tuned by changing the filler type and the total filler content. Further study on the reinforcing mechanism suggests that both the polymer-filler interactions and the filler-filler interactions play key roles in the mechanical property enhancements.
Bibliographical noteFunding Information:
We thank The Dow Chemical Company for financial support of this research and PolyAziridine LLC for providing us with a sample of the tris-aziridine. Parts of this work were carried out in the Institute of Technology Characterization Facility (Char- Fac) at the University of Minnesota, a member of the NSF funded Materials Research Facilities Network, via the MRSEC program. We also thank Dr. David Giles for helpful input on rheology experiments and Dr. Madalyn Radlauer for assistance in the preparation of this manuscript
© 2016 American Chemical Society.
Copyright 2016 Elsevier B.V., All rights reserved.
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