Frigione Mariaenrica, Lettieri Mariateresa, Lionetto Francesca, Mascia Leno
Department of Innovation Engineering, University of Salento, 73100 Lecce, Italy.
CNR-SPIN, Fisciano (Salerno), Italy.
Polymers (Basel). 2020 Feb 19;12(2):476. doi: 10.3390/polym12020476.
Different hybrid epoxy formulations were produced and cold-cured, monitoring the properties development during low temperature curing and aging. All systems were based on silane functionalized bis-phenol A (DGEBA) resins (Part A), cured at ambient temperature with two amine hardeners (Part B). The different components of the formulations were selected on their potential capability to bring about enhancements in the glass transition temperature. The durability of the produced hybrids was probed in comparison to the corresponding neat epoxies by monitoring changes in glass transition temperature () and flexural mechanical properties after exposure to different levels of humidity and immersion in water and at temperatures slightly higher than the local ambient temperature, in order to simulate the conditions encountered during summer seasons in very humid environments. The thermal degradation resistance of the hybrid systems was also evaluated by thermogravimetric analysis.
制备了不同的混合环氧配方并进行冷固化，监测低温固化和老化过程中的性能发展。所有体系均基于硅烷官能化双酚A（DGEBA）树脂（A组分），在室温下用两种胺类固化剂（B组分）固化。根据配方中不同组分提高玻璃化转变温度的潜在能力来进行选择。通过监测玻璃化转变温度（）的变化以及在暴露于不同湿度水平、浸泡在水中并处于略高于当地环境温度的条件下后的弯曲机械性能，将制备的杂化材料与相应的纯环氧树脂进行比较，以模拟在非常潮湿环境中的夏季所遇到的条件，从而探究所制备杂化材料的耐久性。还通过热重分析评估了杂化体系的热降解抗性。
