Regulating Cross-Linking Structure and Dispersion of Core-Shell-Rubber Particles in Polyurethane Composite to Achieve Excellent Mechanical Properties for Structural Adhesive Application.

Zijin Jiang, Lingtong Li, Luoping Fu, Yingte Xu, Lin Zhang, Hong Wu, Shaoyun Guo

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Article in Polymers, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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7 authors.

Zijin JiangThe State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.

Lingtong LiThe State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.

Luoping FuSichuan Dongshu New Materials Co., Ltd., Deyang 618000, China.

Yingte XuSichuan Dongshu New Materials Co., Ltd., Deyang 618000, China.

Lin ZhangSichuan Dongshu New Materials Co., Ltd., Deyang 618000, China.

Hong WuThe State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.ORCID 0000-0001-9972-0873

Shaoyun GuoThe State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu 610065, China.

Funding

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6 · The paper itself

Abstract

Structural adhesives are bonding materials that can quickly join structures with components and repair cracks. However, thermosetting polyurethane structural adhesives suffer from disadvantages such as insufficient toughness, poor aging resistance, and long curing time, which greatly limit their practical application. Herein, a polyurethane (PU) composite with excellent mechanical properties was prepared successfully via regulating the cross-linking structure and the dispersion of core-shell-rubber (CSR) particles. Various polyols were selected to improve the cross-linking density of the PU and to enhance the intermolecular forces, which can achieve the high strength and stability of the polyurethane composites. Solvent displacement was used to improve the dispersion of CSR in PU. The cured composite has ultra-high toughness and impact resistance due to the well-dispersed CSR particles. The impact strength was increased from 52.0 to 90.4 kJ/m

Indexed as

cross-linkingmechanical propertypolyurethanestructural adhesive

Identifiers

PMID39684008

DOI10.3390/polym16233263

PMCPMC11644690

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