Systematic Characterization of Different Quaternary Ammonium Salts to be Used in Organoclays

被引：1

作者：

Barbosa, Renata ^{[1
]}

Morais, Dayanne Diniz Souza ^{[2
]}

Araujo, Edcleide Maria ^{[2
]}

Melo, Tomas Jefferson Alves ^{[2
]}

机构：

[1] Univ Fed Piaui, UFPI, Ctr Technol, Campus Univ Minister Petronio Portela, Teresina, PI, Brazil

[2] Univ Fed Campina Grande, Dept Mat Engn, BR-58109 Campina Grande, Brazil

来源：

ADVANCED POWDER TECHNOLOGY VIII, PTS 1 AND 2 | 2012年 / 727-728卷

关键词：

quaternary ammonium salts; organoclay; thermal behavior;

D O I：

10.4028/www.scientific.net/MSF.727-728.1552

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Studies of degradation have verified that the decomposition of some quaternary ammonium salts can begin to be significant at the temperature of about 180 degrees C and like most thermoplastics are processed at least around this temperature, the thermal stability of the salt in clay should always be considered. Some salts are more stable than others, being necessary to study the degradation mechanisms of each case. In this work, four quaternary ammonium salts were characterized by differential scanning calorimetry (DSC) and thermogravimetry (TG). The results of DSC and TG showed that the salts based chloride (Cl-) anion begin to degrade at similar temperatures, while the salt based bromide (Br-) anion degrades at higher temperature. Subsequently, a quaternary ammonium salt was chosen to be used in organoclays, depending on its chemical structure and its thermal behavior.

引用

页码：1552 / +

页数：2

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