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首页> 外文期刊>Pigment & Resin Technology >Core-shell and interpenetrating-network PU/AC hybrids: synthesis and comparison - waterborne polyurethane/polyacrylate hybrid dispersions
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Core-shell and interpenetrating-network PU/AC hybrids: synthesis and comparison - waterborne polyurethane/polyacrylate hybrid dispersions

机译：核-壳和互穿网络PU / AC杂化物：合成和比较-水性聚氨酯/聚丙烯酸酯杂化物分散体

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Purpose - The purpose of this paper is to synthesise polyurethane/polyacrylate (PU/AC) core-shell hybrid latex by emulsion polymerisation (PUA) and interpenetrating hybrid latex by soap-free emulsion polymerisation techniques latex interpenetrating polymer networks (LIPN) and to compare their physico-chemical and thermo-mechanical properties. Design/methodology/approach - The interactions between the PU and AC components in hybrid coatings were studied with infrared spectroscopy. Mechanical properties were determined by measuring Shore A hardness, pencil hardness and flexibility of dried films. A particle size analyser and scanning electron microscopy were used to investigate the morphology of hybrid resins. Differential scanning calorimetry and thermogravimetric analysis were performed to investigate the thermal stability of polymeric films. Findings - The core-shell hybrids had better physico-chemical and thermo-mechanical properties than LIPN hybrids, attributing better interpenetration and entanglement between PU/AC in emulsion polymerisation. Research limitations/implications - The syntheses of hybrid polymers can be extended for various combinations of acrylate monomers with crosslinkers, as well as for different types of PU ionomers. Practical implications - The comparative study provides a simple and practical solution to improve performance characteristics of PU/AC hybrid coatings, which also proves to be cost effective. Originality/value - The findings are of interest to those in surface coatings and adhesive applications. Show less
机译：目的-本文的目的是通过乳液聚合（PUA）合成聚氨酯/聚丙烯酸酯（PU / AC）核壳杂化胶乳，并通过无皂乳液聚合技术互穿杂化胶乳互穿聚合物网络（LIPN）并进行比较它们的物理化学和热机械特性。设计/方法/方法-用红外光谱研究了杂化涂料中PU和AC组分之间的相互作用。通过测量肖氏A硬度，铅笔硬度和干膜的柔韧性来确定机械性能。使用粒度分析仪和扫描电子显微镜研究杂化树脂的形态。进行差示扫描量热法和热重分析以研究聚合物膜的热稳定性。研究结果-核-壳杂化物比LIPN杂化物具有更好的物理化学和热机械性能，在乳液聚合中归因于PU / AC之间更好的互穿和缠结。研究的局限性/意义-杂化聚合物的合成可以扩展到丙烯酸酯单体与交联剂的各种组合，以及不同类型的PU离聚物的合成。实际意义-这项比较研究提供了一种简单实用的解决方案，以改善PU / AC混合涂料的性能特征，这也证明具有成本效益。原创性/价值-研究结果对于表面涂料和胶粘剂应用感兴趣。显示较少

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