The super-fast synthesis of high-strength epoxy adhesives by UV-initiated frontal polymerization at room temperature

IF 4.5 3区 工程技术 Q1 CHEMISTRY, APPLIED
Jiongfeng Sun , Yi Hong , Guofu Qiao
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Abstract

The synthesis and processing of most polymer adhesives rely on energy-inefficient and environmentally burdensome manufacturing approaches. In this paper, a novel synthesis strategy, UV-initiated frontal polymerization (FP) for the fast synthesis of high-strength, self-propagating epoxy adhesives at room temperature, was presented, in which the self-propagating rate reached 71.4 mm min−1. CuCl2 was used as a catalyst to decrease the onset temperature of polymerization and ensure sufficient polymerization on the surface of the material to be bonded. Mild steel, glass, ceramic, wood, PMAA, and concrete were successfully bonded within several minutes at room temperature. In the same material system, the adhesive strength with the FP curing approach was greater than that of thermal curing, and the former had a better pore structure, as determined by MIP analysis. This paper provides a promising idea for the in-situ fast synthesis of high-strength epoxy adhesives at room temperature.

Abstract Image

室温下通过紫外线引发的正面聚合超快速合成高强度环氧树脂粘合剂
大多数聚合物粘合剂的合成和加工都依赖于能耗低、环境负担重的生产方法。本文提出了一种新型合成策略--紫外线引发的正面聚合(FP),用于在室温下快速合成高强度、自蔓延环氧胶粘剂,其自蔓延速率达到 71.4 mm min-1。使用 CuCl2 作为催化剂可降低聚合开始温度,并确保待粘合材料表面充分聚合。低碳钢、玻璃、陶瓷、木材、PMAA 和混凝土在室温下几分钟内就被成功粘合。在同一材料体系中,FP 固化方法的粘接强度大于热固化方法,而且根据 MIP 分析,前者的孔隙结构更好。本文为室温下原位快速合成高强度环氧树脂粘合剂提供了一种可行的思路。
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来源期刊
Reactive & Functional Polymers
Reactive & Functional Polymers 工程技术-高分子科学
CiteScore
8.90
自引率
5.90%
发文量
259
审稿时长
27 days
期刊介绍: Reactive & Functional Polymers provides a forum to disseminate original ideas, concepts and developments in the science and technology of polymers with functional groups, which impart specific chemical reactivity or physical, chemical, structural, biological, and pharmacological functionality. The scope covers organic polymers, acting for instance as reagents, catalysts, templates, ion-exchangers, selective sorbents, chelating or antimicrobial agents, drug carriers, sensors, membranes, and hydrogels. This also includes reactive cross-linkable prepolymers and high-performance thermosetting polymers, natural or degradable polymers, conducting polymers, and porous polymers. Original research articles must contain thorough molecular and material characterization data on synthesis of the above polymers in combination with their applications. Applications include but are not limited to catalysis, water or effluent treatment, separations and recovery, electronics and information storage, energy conversion, encapsulation, or adhesion.
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