Effect of tetraphenylporphine on the supramolecular structure of cellulose triacetate

The molecularly disperse distribution of tetraphenylporphine (TPP) in cellulose triacetate (CTA) films fabricated from solution was established by x-ray structural analysis. It was shown that low crystallizability during heat treatment is a characteristic feature of CTA membranes containing TPP. This could be due to the position of the porphyrin molecules in the intermolecular spaces in the amorphous phase of the polymer, which restricts the possibility of crystallite growth. The possibility of formation of a complex of TPP and CTA in which the porphyrin molecules are in the crystal lattice of the polymer, altering its parameters, was demonstrated.