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首页> 外文期刊>Journal of Applied Polymer Science >Effects of polyisocyanate on properties and pot life of epoxy resin cross-linked soybean meal-based bioadhesive
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Effects of polyisocyanate on properties and pot life of epoxy resin cross-linked soybean meal-based bioadhesive

机译：多异氰酸酯对环氧树脂交联豆粕基生物胶黏剂性能和适用期的影响

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In this study, polyisocyanate (pMDI) was introduced into epoxy resin modified soybean meal-based bioadhesive to address the issue of low dry bond strength. Specifically, we investigated the effects of adding pMDI in terms of amount and storage time on dry bond strength, water resistance, and pot life of adhesive. Factors examined included shear strength, apparent viscosity, chemical reaction, crystallinity, and morphology of modified adhesives. Results indicated that the dry bond strength and water resistance of the resultant plywood was respectively improved 29.5% and 39.7% by adding 2% pMDI. In addition, the pot life of modified adhesive reached in 4 h. Results also shown that the cross-linking reactions between epoxy group and carbonyl as well as isocyano and amino increased the cross-linking density and formed a denser cross-linking network structure of cured adhesive. The composite cross-linked soybean meal-based adhesive is environmental-friendly and high-performance, which will promote the industrial application of the soy protein-based adhesives. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43362.
机译：在这项研究中，多异氰酸酯（pMDI）被引入环氧树脂改性的豆粕基生物胶粘剂中，以解决低干粘结强度的问题。具体来说，我们研究了添加pMDI的数量和储存时间对干粘合强度，耐水性和胶粘剂适用期的影响。检查的因素包括剪切强度，表观粘度，化学反应，结晶度和改性胶粘剂的形态。结果表明，通过添加2％pMDI，所得胶合板的干粘合强度和耐水性分别提高了29.5％和39.7％。此外，改性胶粘剂的适用期为4小时。结果还表明，环氧基与羰基以及异氰基和氨基之间的交联反应增加了交联密度，并形成了固化胶粘剂的致密交联网络结构。该复合交联豆粕基胶粘剂是环保，高性能的，将促进大豆蛋白基胶粘剂的工业应用。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43362。

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