Effect of the degree of substitution in the transition temperatures and hydrophobicity of hydroxypropyl cellulose esters

We have synthesized and characterized five members of a homologous series of side chain polymers of hydroxypropyl cellulose esters obtained by homogeneous esterification with 6-[4'-(ethoxycarbonyl)biphenyl-4-yloxy]hexanoic acid. Two acylation procedures were studied. One procedure involved the acid chloride derivative and the other one was the activation of that acid with N,N'-carbonyldiimidazol. The second method yielded esters with higher...