Franco-Urquiza E A, May-Crespo J F, Escalante Velázquez C A, Pérez Mora R, González García P
CONACYT-CIDESI, Centro Nacional de Tecnologías Aeronáuticas (CENTA). Carretera Estatal 200 Querétaro-Tequisquiapan km 23 No. 22547, Colón 76270, Querétaro, Mexico.
CONACYT-El Colegio de Michoacán, Cerro de Nahuatzen 85, Fracc. Jardines del Cerro Grande, La Piedad 59370, Michoacán, Mexico.
Polymers (Basel). 2020 Aug 5;12(8):1753. doi: 10.3390/polym12081753.
ZnO particles were synthetized by the sol-gel method and subsequent heat treatment of 400, 500 and 600 °C was applied. The nano ZnO particles were incorporated to the unsaturated polyester resin by solution blending at 0.05 wt % concentration. X-ray diffraction detected the formation of a wurtzite-like structure. Viscoelastic behavior of neat polyester and nanocomposites revealed the nano ZnO particles does not promote better mechanical properties because of a weak interaction and the glass transition temperature of the polyester was favored by the presence of a higher quantity of nano-size ZnO particles. Thermogravimetric analysis at 5, 10 and 20 °C/min allowed determining the degradation kinetic parameters based on the Friedman and Kissinger models for neat polyester and nanocomposites. Heating rates promoted an increase in the temperature degradation and the addition of ZnO particles promoted a catalyst effect that reduce the amount of thermal energy needed to start the thermal degradation.
通过溶胶 - 凝胶法合成了氧化锌颗粒，并对其进行了400、500和600℃的后续热处理。将纳米氧化锌颗粒以0.05 wt%的浓度通过溶液共混法加入到不饱和聚酯树脂中。X射线衍射检测到形成了纤锌矿型结构。纯聚酯和纳米复合材料的粘弹性行为表明，由于相互作用较弱，纳米氧化锌颗粒并未促进更好的机械性能，而较高数量的纳米级氧化锌颗粒的存在有利于提高聚酯的玻璃化转变温度。在5、10和20℃/min的条件下进行热重分析，基于Friedman和Kissinger模型确定了纯聚酯和纳米复合材料的降解动力学参数。升温速率促进了降解温度的升高，而氧化锌颗粒的加入起到了催化作用，降低了开始热降解所需的热能。
