相关实验视频

Updated: Jun 23, 2025

Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing

Evaluation of the Curing of Adhesive Systems by Rheological and Thermal Testing

Published on: July 3, 2020

在环氧系统中验证PP-co-HUPy共聚物的自我愈合能力

Elisa Calabrese¹, Marialuigia Raimondo¹, Andrea Sorrentino²

¹Department of Industrial Engineering, University of Salerno, Via Giovanni Paolo II, 132, 84084 Fisciano, Italy.

|June 19, 2024

概括

自愈的Poly-PEGMA-co-HEMA-UPy (PP-co-HUPy) 共聚合物没有增强环氧树脂的愈合. 固化过程中的相分离和晶体形成阻止了超分子相互作用,阻碍了环氧系统中的自我愈合效率.

科学领域:

聚合物科学聚合物科学
材料科学材料科学材料科学
超分子化学超分子化学

背景情况:

自愈材料旨在自主修复损坏.
二甲基 (UPy) 分子通过键实现了超分子相互作用.
聚-皮格玛-协同-HEMA-UPy (PP-协同-HUPy) 共聚合物被研究其内在的自我愈合特性.

研究的目的:

为了验证PP-co-HUPy共聚物在环氧系统中的自我愈合能力.
评估PP-co-HUPy是否可以在环氧树脂矩阵内诱导超分子相互作用.
调查PP-co-HUPy对环氧固化和材料性能的影响.

主要方法:

在环氧树脂 (EP) 中PP-co-HUPy共聚物的分散.
使用显微镜进行形态研究.
固化度 (DC) 的确定.
动态机械分析 (DMA),包括三角洲 (Tg) 测量.

主要成果:

带有PP-co-HUPy的环氧样本由于相隔离,没有显示自愈效率.
形成了PP-co-HUPy的晶体,随着HUPy含量增加而增加.
环氧的固化程度随着PP-co-HUPy的添加而增加.
储存模块下降,而玻璃过渡温度 (Tg) 显示了与PP-co-HUPy结合的各种变化.

结论:

PP-co-HUPy共聚物不会给环氧系统带来自我愈合的作用.
阶段分离和晶体形成阻碍了超分子愈合机制.
PP-co-HUPy影响了环氧固化动力学和热力学性能.

关键词:

PP-co-HUPy共聚物共聚物超分子相互作用热固性树脂是一种热固性树脂.

更多相关视频

A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli

A Testing Platform for Durability Studies of Polymers and Fiber-reinforced Polymer Composites under Concurrent Hygrothermo-mechanical Stimuli

Published on: December 11, 2014

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

Characteristics and Nomenclature of Copolymers

Characteristics and Nomenclature of Copolymers

Copolymers are the products obtained from the polymerization of multiple monomer species. So, in a polymer chain itself, there can be multiple repeating units that come from different monomers. The process of synthesizing a polymer from different monomer species is called copolymerization. When two monomers are involved, the polymer is known as a bipolymer. Polymers with three and four monomers are termed terpolymers and quaterpolymers, respectively. Figure 1 depicts the copolymerization of...

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...