| Effect of solid particle loading on nucleophilic addition of epoxy-resin to isophorone diisocyanate |
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| 作者姓名： | Wei Zhang Richard S. Blackburn Abbas A. Dehghani-Sanij |
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| 作者单位： | [1]Green Chemistry Group, Centre for Technical Textiles, University of Leeds, Leeds LS2 9JT, UK [2]School of Mechanical Engineering, University of Leeds, Leeds LS2 9JT, UK |
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| 摘 要： | In the preparation of surface coatings made of conductive composites consisting of conductive particulate fillers in a soft matrix, cracks will develop with increase of the particulate loading, which is believed to be related to the nucleophilic addition reaction between glycidyl end-capped poly （bisphenol A-co-epichlorohydrin） and isophorone diisocyanate molecules. This curing reaction is responsible for the generation of crosslinking network throughout the coatings. The influence of solid particle loading on the chemical reaction may be described as a volume-excluded effect, that is, the high solid particle loading will occupy the space between the functional groups thus preventing the chemical reaction to take place. As a direct consequence, the cross-linking network cannot develop properly due to the insufficiency of curing reaction. This will lead to the generation of cracks, as was supported by FT-IR analysis in this work.
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| 关 键 词： | 固体微粒 亲核 离子 树脂 |
| 收稿时间： | 2007-05-31 |
| 修稿时间： | 2007-10-09 |
Effect of solid particle loading on nucleophilic addition of epoxy-resin to isophorone diisocyanate |
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| Wei Zhang Richard S. Blackburn Abbas A. Dehghani-Sanij.Effect of solid particle loading on nucleophilic addition of epoxy-resin to isophorone diisocyanate[J].China Particuology,2008,6(1):24-29. |
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| Authors: | Wei Zhang Richard SBlackburn Abbas ADehghani-Sanij |
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| Abstract: | In the preparation of surface coatings made of conductive composites consisting of conductive particulate fillers in a soft matrix, cracks will develop with increase of the particulate loading, which is believed to be related to the nucleophilic addition reaction between glycidyl end-capped poly (bisphenol A-co-epichlorohydrin) and isophorone diisocyanate molecules. This curing reaction is responsible for the generation of cross-linking network throughout the coatings. The influence of solid particle loading on the chemical reaction may be described as a volume-excluded effect, that is, the high solid particle loading will occupy the space between the functional groups thus preventing the chemical reaction to take place. As a direct consequence, the cross-linking network cannot develop properly due to the insufficiency of curing reaction. This will lead to the generation of cracks, as was supported by FT-IR analysis in this work. |
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| Keywords: | Particle loading Cracks Nucleophilic Addition FT-IR |
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