Abstract
Thermal analysis of polystyrene (PS) particles synthesized in the presence of cetyltrimethylammonium bromide (CTAB) and carboxymethyl cellulose (CMC), with the degree of substitution 0.7 and average molecular mass ( MM ) of 90000 and 250000 g mol -1 was carried out. PS chains grown in the presence of CMC having MM of 90000 g mol -1 presented glass temperature ( T g ) at 375 K, which is in agreement with the literature value. However, the PS chains grown in the presence of longer CMC chains ( MM = 250000 g mol -1 ) presented T g at 352 K. This 23 K decrease in the T g value was caused by the increased polydispersity, which was confirmed by gel permeation chromatography. Thermogravimetry showed five mass loss steps between 298 and 873 K.
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