Synthesis of novel boron-containing epoxy-novolac resins and properties of cured products

被引：65
|
作者：
Martin, C. [1 ]
Lligadas, G. [1 ]
Ronda, J. C. [1 ]
Galia, M. [1 ]
Cadiz, V. [1 ]
机构：
[1] Univ Rovira & Virgili, Dept Quim Analit & Quim Organ, Tarragona 43007, Spain
来源：
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY | 2006年 / 44卷 / 21期
关键词：
boron-containing; crosslinking; epoxy-novolac resin; flame retardant;
D O I：
10.1002/pola.21726
中图分类号：
O63 [高分子化学（高聚物）];
学科分类号：
070305 ; 080501 ; 081704 ;
摘要：
Epoxy-novolac resins were synthesized by modifying a commercial novolac resin with epichlorohydrin. These epoxy-novolac resins were characterized and further modified with different contents of bis(benzo-1,3,2-dioxa-borolanyl)oxide or bis(4,4,5,5-tetramethyl-1,3,2-dioxa-borolanyl)oxide. The boron-containing epoxy-novolac resins were autocatalytically crosslinked or crosslinked with BF(3)MEA and their thermal stability and flame retardancy were determined by thermogravimetric analysis and limiting oxygen index (LOI) values. These LOI values for the bis(benzo-1,3,2dioxa-borolanyl)oxide derivatives were higher than the boron-free novolac resins, which shows the benefit of the presence of boron. To test the role of boron in the enhancement of flammability, scanning electronic microscopy and energy-dispersive X-ray spectroscopy images were made. (c) 2006 Wiley Periodicals, Inc.
引用
收藏
页码：6332 / 6344
页数：13
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