相关实验视频

Updated: Jun 29, 2025

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry

The Preparation and Properties of Thermo-reversibly Cross-linked Rubber Via Diels-Alder Chemistry

Published on: August 25, 2016

机械坚固,耐用和多功能超交联弹性体基于金属有机集群交联:拓结构的作用

Qi-Sheng Huang¹, Yan Ma¹, Yan-Long Luo^1,2

¹State Key Laboratory of Coordination Chemistry, School of Chemistry and Chemical Engineering, Collaborative Innovation Center of Advanced Microstructures, Nanjing University, Nanjing, 210023, P. R. China.

|March 26, 2024

概括

一个新型的超分支金属有机集群 (MOC) 作为高连接性交叉连接器,创造了强大的,自我修复的,可回收的聚合物,增强了耐用性和稳定性.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
纳米技术纳米技术

背景情况:

传统的聚合物网络往往具有较低的分支功能,导致材料薄弱,软,湿度敏感.
现有的交叉连接器,通常涉及少数聚合物链和单个金属离子,限制材料性能和耐用性.

研究的目的:

开发一个新的超分支金属有机集群 (MOC) 交叉连接器,具有高连接性.
使用MOC交叉连接器构建超交叉连接的聚合物网络.
评估由此产生的弹性体的机械强度,稳定性,自我修复性和可回收性.

主要方法:

通过简单的协调反应,合成了多分支的金属有机集群 (MOC),其中最多有16个乙烯基组.
MOC被用作高连接度交叉连接器来创建超交叉连接的聚合物网络.
评估了弹性体的机械性能,抗,湿度稳定性,自我愈合性,可回收性和光稳定性.

主要成果:

实现了MOC交叉连接器的简单,克尺度合成,与金属有机/多面体的复杂,低产量的方法形成鲜明对比.
这种MOC驱动的超交联弹性体表现出显著的机械强度,抗爬行性和湿度稳定性.
弹性体在温和条件下表现出自我愈合和可回收性,以及稳定的光.

结论:

超分支的MOC交叉连接器可以构建具有卓越综合性质的先进聚合物网络.
增强的性能归因于独特的超交联拓结构和微相分离形态学.
这种方法为开发机械坚固,耐用和多功能聚合物提供了新的途径.

关键词:

超交联聚合物的高分子.金属有机集群 - - 有机集群稀土复合物是稀土复合物的组成部分.可回收的聚合物可以回收利用.

更多相关视频

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Synthesis of Programmable Main-chain Liquid-crystalline Elastomers Using a Two-stage Thiol-acrylate Reaction

Published on: January 19, 2016

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Depolymerizable Olefinic Polymers Based on Fused-Ring Cyclooctene Monomers

Published on: December 16, 2022

相关概念视频

Polymer Classification: Architecture

Polymer Classification: Architecture

Polymers are classified as linear or branched on the basis of their chain architecture. The polymer chains in linear polymers have a long chain-like structure with minimal to no branching at all. Even if a polymer features large substituent groups on the monomer, which appear as branches to the skeleton, it is not considered a branched polymer. A branched polymer contains secondary polymer chains that arise from the main polymer chain. The branching occurs when the polymer growth shifts from...

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

Olefin Metathesis Polymerization: Ring-Opening Metathesis Polymerization (ROMP)

Ring-opening metathesis polymerization or ROMP involves strained cycloalkenes as starting materials. The mechanism of ROMP proceeds by reacting cycloalkene with Grubbs catalyst to give metallacyclobutane intermediate which undergoes a ring-opening reaction to form new carbene. The new carbene reacts with another molecule of cycloalkene. Repetition of these steps leads to the formation of an unsaturated open-chain polymer product. All these steps are reversible, however, relieving the ring...

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Olefin Metathesis Polymerization: Acyclic Diene Metathesis (ADMET)

Acyclic diene metathesis polymerization or ADMET polymerization involves cross-metathesis of terminal dienes, such as 1,8-nonadiene, to give linear unsaturated polymer and ethylene. As ADMET is a reversible process, the formed ethylene gas must be removed from the reaction mixture to complete the polymerization process.
Similar to cross-metathesis, ADMET also involves the formation of metallacyclobutane intermediate by [2+2] cycloaddition of one of the double bonds of a terminal diene with...