Syntheses of Metallic Cyclodextrins and Their Use as Synergists in a Poly(Vinyl Alcohol)/Intumescent Flame Retardant System

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• 作者：Jianxiang Feng ; Xiaomin Zhang ; Songqi Ma ; Zhu Xiong ; Chuanzhi Zhang ; Yanhua Jiang ; Jin Zhu
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：February 27, 2013
• 年：2013
• 卷：52
• 期：8
• 页码：2784-2792
• 全文大小：477K
• 年卷期：v.52,no.8(February 27, 2013)
• ISSN：1520-5045

文摘

Maleated cyclodexdrin (MC) and its metal salts (Metal MC) were synthesized and added into poly(vinyl alcohol)鈥搃ntumescent flame retardant (PVA鈥揑FR) composites as synergists. Results of thermogravimetric analysis (TGA) and differential thermal analysis (DTG) showed that the thermal stability of the composites was greatly improved. The initial decomposition temperature of PVA鈥揑FR composites was increased by 16 掳C with the addition of metal MC. UL-94 vertical burning test indicated that the metallic cyclodextrin (metal MC) can catalyze the PVA鈥揑FR system to form strong intumescent char and reach V0 rating at the proper proportion. The morphology and compositions of the char residue of PVA鈥揑FR composites were characterized by scanning electron microscopy (SEM), Raman spectra, FTIR, and X-ray photoelectron spectroscopy (XPS). The results demonstrated that the metal ions could boost the formation of organized and compact char layer in the condensed phase during the degradation of PVA.