蒙脱石
热重分析
相(物质)
PEG比率
聚乙烯
材料科学
大气温度范围
热分解
粘土矿物
红外光谱学
聚乙二醇
核化学
分析化学(期刊)
矿物学
化学工程
化学
无机化学
有机化学
复合材料
工程类
物理
财务
气象学
经济
作者
Luca Zampori,Giovanni Dotelli,Paola Gallo Stampino,Cinzia Cristiani,Federico Zorzi,Elisabetta Finocchio
标识
DOI:10.1016/j.clay.2012.02.015
摘要
Two polyethylene-glycols (PEG), having different molecular weight (i.e. PEG 1500 and PEG 4000) were intercalated inside the interlayer space of a STx montmorillonite. The microstructure of the intercalated clay mineral was investigated by thermogravimetry (TG) and in situ high temperature-XRD, in order to assess the evolution of the interlayer space upon temperature. Data were collected over a temperature range of 25–1000 °C and 25–850 °C for TG and thermo-XRD, respectively. Decomposition of the intercalated polymers was very different compared to the one of the pure surfactants, as detected by TG and FT IR spectroscopy. In situ high temperature-XRD data showed the formation of a high-temperature phase, detected at 250 °C, independently from the molecular weight of the PEG intercalated. This phase showed to be stable when the temperature was decreased to 25 °C and was raised again to 250 °C. An irregularly interstratified phase was observed when the modified clay minerals were heated at 200 °C.
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