Acetylene-grafted resins derived from phenolics via azo coupling reaction
Wang, Mingcun1; Yang, Ming2; Zhao, Tong2; Pei, Jian1
AbstractNovel phenolic resins with high ethynyl contents were realized via azo coupling reaction between phenol units and diazonium of 3-ethynylaniline. If Novolac and high-ortho Novolac resins were used as the starting materials directly, the ratio of ethynyl groups to phenolic rings was ca 70%; while the ratio was 100% for the resin from Friedel-Craft polycondensation of 4-(3-ethynylphenyl)salicyl alcohol. All the resins were readily soluble in acetone and ethanol, and meltable at temperatures below 100 degrees C. The resins underwent thermal addition-type cure with a broad exotherm of around 140-280 degrees C, and the starting curing temperature showed a downward drift with increase in the ethynyl content. The thermal properties of the cured resins, determined from thermogravimetric analysis (TGA), were considerably superior to those of Novolac- and Resole-type phenolic resins. The initial decomposition temperatures were at ca 400 degrees C, and the anaerobic carbon yields were ca 80% for all the resins. (C) 2008 Elsevier Ltd. All rights reserved.
KeywordPhenolic Resins Ethynyl Azo Coupling Addition Cure Thermal Properties
Indexed BySCI
WOS IDWOS:000255604600029
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Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorWang, Mingcun
Affiliation1.Peking Univ, Coll Chem & Mol Engn, Beijing 100871, Peoples R China
2.Chinese Acad Sci, Inst Chem, Beijing 100080, Peoples R China
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GB/T 7714
Wang, Mingcun,Yang, Ming,Zhao, Tong,et al. Acetylene-grafted resins derived from phenolics via azo coupling reaction[J]. EUROPEAN POLYMER JOURNAL,2008,44(3):842-848.
APA Wang, Mingcun,Yang, Ming,Zhao, Tong,&Pei, Jian.(2008).Acetylene-grafted resins derived from phenolics via azo coupling reaction.EUROPEAN POLYMER JOURNAL,44(3),842-848.
MLA Wang, Mingcun,et al."Acetylene-grafted resins derived from phenolics via azo coupling reaction".EUROPEAN POLYMER JOURNAL 44.3(2008):842-848.
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