Macromolecular Mobility Changes Induced by Thermal Aging of Epoxy‐amine Polymer Networks
نویسندگان
چکیده
Changes in macromolecular mobility during the thermal oxidation of epoxy-amine thermoset networks are addressed this study. Three systems, cured with DGEBA and three similar aliphatic hardeners – ethylenediamine (EDA), diethylenetriamine (DETA), triethylenetetramine (TETA) aged at 160°C characterized by dynamic mechanical analysis (DMA). Results show a split single initial α relaxation peak aging, which may imply that chain scissions preferred certain oxidizable sites network. A β can be identified around -60°C does not seem to evolve much while another sub-glass transition 30°C decreases it. Implications work both fracture properties segmental radical chemical functions involved bimolecular reactions have yet confirmed.
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ژورنال
عنوان ژورنال: Macromolecular Symposia
سال: 2022
ISSN: ['1521-3900', '1022-1360']
DOI: https://doi.org/10.1002/masy.202100228