Polyurethane hot-melt adhesives for strong and tough adhesion

IF 6.3 2区化学 Q1 POLYMER SCIENCE European Polymer Journal Pub Date : 2025-03-19 Epub Date: 2025-02-11 DOI:10.1016/j.eurpolymj.2025.113814

Jinxing Shi , Xuewei Li , Axiang Li , Haixia Wei , Enyang Zhang , Wangqing Zhang

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Abstract

With the features of easy-operation, fast-bonding and convenient recycling, thermoplastic polyurethane hot-melt adhesives are widely used in daily life and industry. However, thermoplastic polyurethane hot-melt adhesives face the deficiency of poor adhesion strength. Herein, we demonstrate a thermoplastic polyurethane hot-melt adhesive with high adhesion strength on a variety of substrates including metals and plastics under moderate operation conditions. Ascribed to the synergistic effect of the furan moieties in the backbone and the 2-ureido-4-pyrimidinone moieties in the side-chains, the synthesized polyurethane hot-melt adhesive realizes a high adhesion strength of 12.63 MPa. Meanwhile, this adhesive can maintain about 89% original adhesion strength after five recycling use. Besides, such adhesive has favorable tolerance to harsh conditions such as diverse liquids at extremely low temperature of −196 °C. It is expected that this polyurethane hot-melt adhesive has promising application.

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聚氨酯热熔胶，附着力强而坚韧

热塑性聚氨酯热熔胶具有操作简单、粘接快速、回收方便等特点，在日常生活和工业中得到了广泛的应用。然而，热塑性聚氨酯热熔胶面临着粘接强度差的不足。在此，我们展示了一种热塑性聚氨酯热熔胶，在中等操作条件下，在各种基材（包括金属和塑料）上具有高粘附强度。由于主链上的呋喃基团与侧链上的2-脲基-4-嘧啶酮基团的协同作用，合成的聚氨酯热熔胶的粘接强度达到12.63 MPa。同时，该胶经五次循环使用后，仍能保持89%左右的原有附着力。此外，该粘合剂在- 196°C的极低温度下对各种液体等恶劣条件具有良好的耐受性。预计该聚氨酯热熔胶具有广阔的应用前景。

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来源期刊

European Polymer Journal 化学-高分子科学

CiteScore

9.90

自引率

10.00%

发文量

691

审稿时长

23 days

期刊介绍： European Polymer Journal is dedicated to publishing work on fundamental and applied polymer chemistry and macromolecular materials. The journal covers all aspects of polymer synthesis, including polymerization mechanisms and chemical functional transformations, with a focus on novel polymers and the relationships between molecular structure and polymer properties. In addition, we welcome submissions on bio-based or renewable polymers, stimuli-responsive systems and polymer bio-hybrids. European Polymer Journal also publishes research on the biomedical application of polymers, including drug delivery and regenerative medicine. The main scope is covered but not limited to the following core research areas: Polymer synthesis and functionalization • Novel synthetic routes for polymerization, functional modification, controlled/living polymerization and precision polymers. Stimuli-responsive polymers • Including shape memory and self-healing polymers. Supramolecular polymers and self-assembly • Molecular recognition and higher order polymer structures. Renewable and sustainable polymers • Bio-based, biodegradable and anti-microbial polymers and polymeric bio-nanocomposites. Polymers at interfaces and surfaces • Chemistry and engineering of surfaces with biological relevance, including patterning, antifouling polymers and polymers for membrane applications. Biomedical applications and nanomedicine • Polymers for regenerative medicine, drug delivery molecular release and gene therapy The scope of European Polymer Journal no longer includes Polymer Physics.