Abstract
The present study reports a comparison on aggregation behaviour of PEO-PPO star block copolymers Tetronics® 1304 and 1307 in the presence of toluene, phenol and methyl phenols viz. o-cresol, m-cresol, p-cresol. These organic compounds are frequently used in plastics, dyes, pesticides and pharmaceutical industries. Star block copolymers, Tetronics®, are used to solubilise different poorly aqueous soluble substances for a long time in different industrial applications. So, to understand the influence of these solvents on the micellar dimensions of star block copolymers T1304 and T1307 with varied hydrophobicity, dynamic light scattering (DLS) and small angle neutron scattering (SANS) techniques are used. The result reveals the presence of spherical micelles for both the copolymers. However, a significant growth in micellar size is observed with continuous addition of these organic solvents as additives. Maximum micellar growth is observed in the presence of o-cresol and minimum in the presence of toluene.
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