金属催化转化用于热的治愈和组装
Mathieu Capelot1, Damien Montarnal, François Tournilhac
1Matière Molle et Chimie (UMR 7167 ESPCI-CNRS), Ecole Supérieure de Physique et Chimie Industrielles de la Ville de Paris ESPCI ParisTech, 10 rue Vauquelin, 75005 Paris, France.
Journal of the American Chemical Society
|April 28, 2012
概括
债券交换反应的催化控制允许修复交联聚合物. 这使得环氧热的可适应性接和组装成为可能,与热塑性塑料相比具有优势.
科学领域:
- 聚合物化学 聚合物化学
- 材料科学 材料科学 材料科学
背景情况:
- 交联聚合物网络,如环氧热聚,以其耐用性而闻名,但通常缺乏自我愈合能力.
- 传统的热很难修复或再加工一旦固化,限制了它们的应用和寿命.
研究的目的:
- 为了研究环氧热固体材料中自愈的键交换反应的催化控制.
- 为了证明温度依赖的愈合动力学,并探索催化剂度的影响.
主要方法:
- 利用转化催化剂在环氧酸和环氧无化物热固体网络中促进键交换反应.
- 在高温和低温下研究治疗能力.
- 采用模型分子来分析愈合过程的动力学.
主要成果:
- 在高温下通过转化实现了交联环氧热的有效治愈.
- 在较低温度下观察到缓慢的交换反应和经典的热性质.
- 证实愈合动力学与转化反应速率直接相关.
- 证明了催化剂度可以控制接和组装过程.
结论:
- 债券交换反应的催化控制为治疗环氧热提供了一个可行的机制.
- 取决于温度的动力学允许可调节的愈合和处理.
- 与热塑性塑料相比,这种方法在组装环氧热时提供了更好的控制和灵活性.
相关概念视频
Olefin Metathesis Polymerization: Overview
Recently, the development of olefin metathesis polymerization advanced the field of polymer synthesis. Simply put, the reorganization of substituents on their double bonds between two olefins in the presence of a catalyst is known as the olefin metathesis reaction. The use of metathesis reaction for polymer synthesis is called olefin metathesis polymerization.
Ruthenium-based Grubbs catalyst is the most commonly used catalyst for olefin metathesis polymerization. Grubbs catalyst consists of a...
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