Physical Crosslinking of Aqueous Polymer Dispersions: A Perspective

IF 2.7 4区 材料科学 Q3 CHEMISTRY, PHYSICAL
Nicholas Ballard, Nerea Jimenez, José M. Asua
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引用次数: 0

Abstract

Colloidal polymers, and in particular aqueous polymer dispersions, are widely used in commercial applications such as coatings and adhesives. Historically, the solvent resistance and mechanical properties of these systems have been improved by covalently crosslinking the polymer chains after drying. More recently, work has been directed toward replacing this covalent crosslinking, which typically involves highly reactive functional groups, by physical crosslinking through the use of supramolecular interactions. While conceptually similar to the use of covalent crosslinking, physical crosslinking has a unique influence on the rheology of the polymer, which leads to substantial differences in the development of mechanical strength during drying, as well as the mechanical properties of the final polymer film. In this perspective, the advantages and challenges of this approach are outlined, and an outlook for future research in this direction is provided.
水性聚合物分散体的物理交联:透视
胶体聚合物,特别是水性聚合物分散体,广泛应用于涂料和粘合剂等商业领域。一直以来,这些系统的耐溶剂性和机械性能都是通过在干燥后对聚合物链进行共价交联来改善的。最近,人们开始利用超分子相互作用进行物理交联,以取代通常涉及高活性官能团的共价交联。虽然物理交联在概念上与共价交联相似,但它对聚合物的流变性有独特的影响,从而导致干燥过程中机械强度的发展以及最终聚合物薄膜的机械性能存在很大差异。从这个角度概述了这种方法的优势和挑战,并对这一方向的未来研究进行了展望。
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来源期刊
Particle & Particle Systems Characterization
Particle & Particle Systems Characterization 工程技术-材料科学:表征与测试
CiteScore
5.50
自引率
0.00%
发文量
114
审稿时长
3.0 months
期刊介绍: Particle & Particle Systems Characterization is an international, peer-reviewed, interdisciplinary journal focusing on all aspects of particle research. The journal joined the Advanced Materials family of journals in 2013. Particle has an impact factor of 4.194 (2018 Journal Impact Factor, Journal Citation Reports (Clarivate Analytics, 2019)). Topics covered include the synthesis, characterization, and application of particles in a variety of systems and devices. Particle covers nanotubes, fullerenes, micelles and alloy clusters, organic and inorganic materials, polymers, quantum dots, 2D materials, proteins, and other molecular biological systems. Particle Systems include those in biomedicine, catalysis, energy-storage materials, environmental science, micro/nano-electromechanical systems, micro/nano-fluidics, molecular electronics, photonics, sensing, and others. Characterization methods include microscopy, spectroscopy, electrochemical, diffraction, magnetic, and scattering techniques.
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