The changes in hydrogen bonding at the interface of silica-reinforced polysiloxane composites due to aging in gamma radiation environments were examined in this study. Solvent swelling was utilized to determine the individual contributions of the matrix polymer and polymer-filler interactions to the overall crosslink density. The results show how the polymer-filler hydrogen bonding dominates the overall crosslink density of the material. Air irradiated samples displayed decreased hydrogen bonding at the polymer-filler interface, while vacuum irradiation revealed the opposite effect.
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Chien, A.T., Balazs, B. & LeMay, J. Characterization of the Polymer-Filler Interface in γ-Irradiated Silica-Reinforced Polysiloxane Composites. MRS Online Proceedings Library 629, 514 (2000). https://doi.org/10.1557/PROC-629-FF5.14