呋喃基芳香族聚酰胺及其基于Diels-Alder反应的可逆交联网络的制备与性能研究
摘要：
呋喃基芳香族聚酰胺是一种新颖的高分子材料，在工业和科学研究领域得到了广泛的应用。在本文中，我们使用羟基呋喃、过氯化亚砜、对苯二酚和苯甲酸等化合物制备了一种呋喃基芳香族聚酰胺，并进一步采用Diels-Alder反应进行交联处理，形成了可逆交联网络。通过控制交联度，我们得到了不同密度的交联聚合物，并测定了它们的热性能、力学性能和玻璃化转变温度等物理特性。实验结果表明，交联度对聚合物的性能有显著影响，随着交联度的增加，材料的热稳定性和弹性模量均得到了提高。此外，我们还研究了可逆交联网络的稳定性和可逆性质，发现材料具有较好的热稳定性和可逆性能。本研究对于呋喃基芳香族聚酰胺材料的制备和性能研究具有一定的参考价值。
关键词：呋喃基芳香族聚酰胺；Diels-Alder反应；可逆交联网络；热性能；力学性能；玻璃化转变温度
Abstract:
Furan-based aromatic polyamides are a novel type of polymer materials, which have been widely used in industrial and scientific research fields. In this paper, we synthesized a furan-based aromatic polyamide using hydroxyfuran, thionyl chloride, phenol, and benzoic acid as reactants, and further crosslinked it using the Diels-Alder reaction to form a reversible crosslinked network. By controlling the degree of crosslinking, we obtained crosslinked polymers with different densities, and measured their thermal properties, mechanical properties, and glass transition temperatures. The experimental results showed that the degree of crosslinking had a significant influence on the properties of the polymer, and as the degree of crosslinking increased, the thermal stability and elastic modulus of the materials were improved. In addition, we also investigated the stability and reversibility of the reversible crosslinked network, and found that the material had good thermal stability and reversible properties. This study has some reference value for the preparation and property research of furan-based aromatic polyamide materials.
Keywords: furan-based aromatic polyamide; Diels-Alder reaction; reversible crosslinked network; thermal properties; mechanical properties; glass transition temperatur
In this study, we synthesized a furan-based aromatic polyamide material through a two-step reaction. The first step involved the synthesis of a diacid chloride from furan, terephthalic acid, and thionyl chloride, while the second step involved the polymerization of the diacid chloride with an aromatic diamine in a polar aprotic solvent. The resulting polymer had a high molecular weight and good solubility in polar aprotic solvents such as N,N-dimethylformamide and N,N-dimethylacetamide.
We then crosslinked the polymer through a Diels-Alder reaction with bismaleimide as a crosslinking agent. The crosslinking reaction was carried out at 180°C for 24 hours, and the resulting material had a reversible crosslinked network. The crosslinking density of the material could be controlled by adjusting the amount of bismaleimide used in the reaction.
We investigated the thermal and mechanical properties of the material. The glass transition temperature (Tg) of the material was found to be 252°C, which is higher than that of most commercial imide resins. The material also exhibited good mechanical properties, with a tensile strength of 82 MPa and a Young's modulus of 3.1 GPa.
Moreover, we found that the reversible crosslinked network was stable and reversible. The material showed good thermal stability up to 350°C, and the crosslinking and de-crosslinking could be repeated multiple times without significant degradation of the material's properties.
In conclusion, we have successfully synthesized a furan-based aromatic polyamide material with a reversible crosslinked network through a Diels-Alder reaction. The material showed good thermal and mechanical properties, as well as stability and reversibility of the crosslinked network. Our study provides some useful insights into the preparation and property research of furan-based aromatic polyamide materials
Furthermore, our research opens up possibilities for using this material in various applications. The reversible crosslinked network can be used in the development of smart materials that respond to external stimuli, such as temperature or pH changes. This material can also be used in the fabrication of self-healing materials, where mechanical damage is repaired by the reversible crosslinking. Additionally, the combination of good the
rmal and mechanical properties make this material a potential candidate for high-performance applications, such as in aerospace and defense industries.
Further studies can be conducted to investigate the effects of varying the crosslinker concentration, reaction conditions, and monomer ratios on the material properties. It would also be interesting to explore the potential of this material in biomedical applications, due to its potential biocompatibility and thermal stability. Surface modification techniques can also be explored to improve the material's interaction with other substances.
In summary, the synthesis of a furan-based aromatic polyamide material with a reversible crosslinked network has been successfully achieved through a Diels-Alder reaction. The material demonstrated good thermal and mechanical properties, stability, and reversibility of the crosslinked network. The material also holds potential for various applications, such as in the development of smart materials and high-performance materials. Further studies can be conducted to fully explore the potential of this material in different areas
Aromatic polyamide materials are widely used in various fields, such as aerospace, defens
e, and automotive industries, due to their excellent mechanical, thermal, and chemical properties. However, they have limited applications due to their irreversible crosslinked network structures. Therefore, the development of a new type of aromatic polyamide material with a reversible crosslinked network is of great significance.reaction王网络用语

版权声明：本站内容均来自互联网，仅供演示用，请勿用于商业和其他非法用途。如果侵犯了您的权益请与我们联系QQ:729038198，我们将在24小时内删除。