Influence of treating parameters on thermomechanical properties of recycled epoxy-acid vitrimers
Influence of treating parameters on thermomechanical properties of recycled epoxy-acid vitrimers
复制标题
处理参数对回收环氧酸玻璃体热机械性能的影响
DOI：
10.1039/c9sm02220a
复制
发表时间：
2020-02-14
期刊：
影响因子：
3.4
通讯作者：
Ge, Qi
中科院分区：
文献类型：
--
作者：
Li, Honggeng;Zhang, Biao;Ge, Qi
玻璃聚合物具有形状重塑和表面焊接的特性，并具有与热固性塑料相同的优异机械性能;因此，玻璃聚合物有望成为传统塑料的广泛替代品。自2011年首次推出以来，玻璃体聚合物已被应用于许多独特的应用，如可再加工的复合材料和液晶弹性体致动器。一系列实验研究了后处理条件（如温度、时间和压力）对回收材料的影响。然而，颗粒尺寸对回收材料的机械性能的影响还没有报道。本文对不同粒径的环氧酸硫酸酯的回收进行了实验研究。制备了不同粒径分布的环氧酸硫酸盐粉体，并对其进行了表征。通过动态力学分析和单轴拉伸试验，研究了粒径对再生环氧-酸性玻璃化树脂力学性能的影响。此外，其他工艺参数，如温度，时间和压力进行了讨论，以及它们与粒度的相互作用。该研究有助于完善硫酸盐后处理条件参数工具箱，为键交换反应动力学的简单可靠控制提供实验支持。
Vitrimers have the characteristics of shape-reforming and surface-welding, and have the same excellent mechanical properties as thermosets; so vitrimers hold the promise of a broad alternative to traditional plastics. Since their initial introduction in 2011, vitrimers have been applied to many unique applications such as reworkable composites and liquid crystal elastomer actuators. A series of experiments have investigated the effects of reprocessing conditions (such as temperature, time, and pressure) on recycled materials. However, the effect of particle size on the mechanical properties of recycled materials has not been reported. In this paper, we conducted an experimental study on the recovery of epoxy-acid vitrimers of different particle sizes. Epoxy-acid vitrimer powders with different particle size distributions were prepared and characterized. The effects of particle size on the mechanical properties of regenerated epoxy-acid vitrimers were investigated by dynamic mechanical analysis and uniaxial tensile tests. In addition, other processing parameters such as temperature, time, and pressure are discussed, as well as their interaction with particle size. This study helped to refine the vitrimer reprocessing condition parameter toolbox, providing experimental support for the easy and reliable control of the kinetics of the bond exchange reaction.