期刊
EUROPEAN POLYMER JOURNAL
卷 49, 期 6, 页码 1298-1313出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.eurpolymj.2013.02.001
关键词
Cold cure; Epoxy; Gelation; Hybrid; Microvoiding; Vitrification
资金
- PON 2007-2013 IT@CHA - Italian Technologies for Advanced Applications in Cultural Heritage Assets
- Apulia Regional funds in the framework 'Network of Public Research Laboratories'
- Project: Applied Innovation Technologies for Diagnosis and Conservation of Built Heritage - A.I.Te.C.H.
An epoxy-silica hybrid was produced from a mixture of an amine-silane functionalized bisphenol-A resin and a siloxane precursor derived from tetraethoxysilane with small amounts of glycidoxypropyltrimethoxysilane coupling agent. The low temperature curing characteristics and final properties of the hybrid system were compared to those of two epoxy controls. Examinations were carried out by differential scanning calorimetry, dynamic mechanical analysis, electron microscopy, thermogravimetric analysis, UV-Vis spectroscopy, SAXS and densitometry. The modulus, strength and ductility were measured in 3-point bending mode at 23 and 50 degrees C. The siloxane hybridization of the original epoxy resin was found to increase the glass transition temperature (Tg) of cold cured systems by more than 10 degrees C and to produce large improvements in mechanical properties. The study has also provided new insights for the events taking place during gelation, vitrification and curing to the equilibrium state. (C) 2013 Elsevier Ltd. All rights reserved.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据