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

Renata Barbosa; Dayanne Diniz Souza; Edcleide Maria Araújo; Tomás Jefférson Alves de Mélo

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

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HomeMaterials Science ForumMaterials Science Forum Vols. 727-728Systematic Characterization of Different...

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

Abstract:

Studies of degradation have verified that the decomposition of some quaternary ammonium salts can begin to be significant at the temperature of about 180 ° 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.

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Periodical:

Materials Science Forum (Volumes 727-728)

Pages:

1552-1556

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.727-728.1552

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Online since:

August 2012

Authors:

Renata Barbosa, Dayanne Diniz Souza, Edcleide Maria Araújo, Tomás Jefférson Alves de Mélo

Keywords:

Organoclay, Quaternary Ammonium Salt, Thermal Behavior

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