Abstract
The yield response of nine architecturally different glassy networks is investigated under several stress states, strain rates, and temperatures, and correlations are made among them. Differences in molecular architecture are quantified through two proposed governing parameters; the glass transition temperature, T g, capturing network stiffness and the cohesive energy density, E c, reflecting network strength. Cohesive energy density is estimated using molecular modeling techniques and supported by solvent swelling experiments. The limits of the correlations made between molecular architecture and yield behavior are further studied with attempts to relate yielding in thermoplastic glasses and heterogeneous networks.
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Acknowledgements
The authors wish to thank the Center for UMass/Industrial Research in Polymers (CUMIRP) Cluster M that receives support from Essilor, International Paper, Loctite, and Meadwestvaco. In addition, they thank the Army Research Labs and the National Science Foundation for their support of the Materials Research Science and Engineering Center (MRSEC). They also would like to acknowledge Dow Chemical for the plane strain test results and funding.
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Calzia, K.J., Lesser, A.J. Correlating yield response with molecular architecture in polymer glasses. J Mater Sci 42, 5229–5238 (2007). https://doi.org/10.1007/s10853-006-1268-0
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DOI: https://doi.org/10.1007/s10853-006-1268-0