Effect of tetraphenylporphine on the supramolecular structure of cellulose acetates

Resumo

The molecular-disperse distribution of tetraphenylporphine in solution-cast cellulose triacetate and diacetate films was established by X-ray structural analysis. It was shown that the low crystallizability during heat treatment is a characteristic feature of cellulose acetates membranes containing tetraphenylporphine. This could be due to fact that the porphyrin molecules are located in the intermolecular spaces of the amorphous phase of the polymer, thereby hindering crystallite growth. Evidence for the formation of a complex of tetraphenylporphine and cellulose acetates, where the additive resides in the crystal lattice of the polymer and alters its parameters, was obtained.