Abstract
The gelation behavior of methylcellulose (MC) was studied by the dynamic mechanical analysis and UV-spectroscopy. To investigate the chain elastic response the dynamic strain experiment is performed at various temperatures, where the decrease in the peak heights with an increase in temperature reveals the increase in rigidity of the sol-gel network. The continuous rotation of functional groups induces turbidity in MC, therefore the association of –OCH3 groups or appearance of cloud point occurs earlier to the gel point. The area under the various curves also signifies the bridging percolated network of the MC aqueous system. Further, the mechanism of gelation is described as an equilibrium among the trans- and gauche-conformations. Computationally, various angles in the cyclic monomeric units of MC and the torsional angles in adjacent monomeric units are reconnoitered to describe the stability of the helical structure of MC.
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