Elham Rouhi , Mehdi Poorabdollah , Kiumars Bahrami
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引用次数: 0
摘要
在这项研究中,γ-氧化铝(γ-Al2O3)颗粒通过控制目标自由基和醇酸树脂链的吸附比例,在不饱和聚酯(UP)树脂中形成了规则而坚固的网络。与 Neat UP 树脂相比,复合材料的储存模量、韧性、拉伸强度和弯曲强度分别提高了 80%、42%、46.39% 和 60.31%。对机械和物理特性以及固化动力学的同步研究表明,UP/Al 1 复合材料机械和物理特性的显著改善是由于γ-Al2O3 颗粒对自由基的定向控制以及醇酸树脂链的比例吸附增加了网络的规则性。与 Neat UP 树脂(分别为 -9.4 和 40.3 kJ/mol)相比,UP/Al 1 复合材料的 K 值和 ED 值(Vyazovkin-Sbirrazzuoli 扩散因子 (D-因子))(分别为 -22.8 和 27.7 kJ/mol)明显降低,这证实了 γ-Al2O3 颗粒显著提高了网络的规整性。
Targeted control of unsaturated polyester resin curing kinetics to enhance network regularity and achieve impressive improvement in mechanical properties using gamma-aluminia: Exploring the relationship between curing kinetics and mechanical properties
In this study, gamma-alumina (γ-Al2O3) particles were used to create a regular and strong network of unsaturated polyester (UP) resins by controlling the targeted free radicals and proportional adsorption of alkyd chains. The composite exhibited 80 %, 42 %, 46.39 %, and 60.31 % increases in the storage modulus, toughness, tensile strength, and flexural strength, respectively, compared with the Neat UP resin. A simultaneous study of the mechanical and physical characteristics and curing kinetics showed that the significant improvement in the mechanical and physical characteristics of the UP/Al 1 composite was due to the increase in the network regularity resulting from the targeted control of free radicals by γ-Al2O3 particles and the proportional adsorption of alkyd chains. The significant decrease in the values of K and ED (Vyazovkin–Sbirrazzuoli diffusion factor (D-factor)) for the UP/Al 1 composite (-22.8 and 27.7 kJ/mol, respectively) compared to that of the Neat UP resin (-9.4, and 40.3 kJ/mol, respectively) confirms a significant increase in network regularity resulting from γ-Al2O3 particles.
期刊介绍:
Thermochimica Acta publishes original research contributions covering all aspects of thermoanalytical and calorimetric methods and their application to experimental chemistry, physics, biology and engineering. The journal aims to span the whole range from fundamental research to practical application.
The journal focuses on the research that advances physical and analytical science of thermal phenomena. Therefore, the manuscripts are expected to provide important insights into the thermal phenomena studied or to propose significant improvements of analytical or computational techniques employed in thermal studies. Manuscripts that report the results of routine thermal measurements are not suitable for publication in Thermochimica Acta.
The journal particularly welcomes papers from newly emerging areas as well as from the traditional strength areas:
- New and improved instrumentation and methods
- Thermal properties and behavior of materials
- Kinetics of thermally stimulated processes