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Improved mechanical performance of the self-strengthening polymer adhesive over time: (a) Stress-relaxation test results and (b) Stress-strain behavior prediction based on Prony-series-fitted stress-relaxation-test data. Stress relaxation test informs that HEMA/BISGMA/MPS formulation (E1) is superior to HEMA/BISGMA/MES formulation (C1) in terms of stiffening behavior in wet conditions.
