Modification of triacetate cellulose polymer compositions by oligodiurethanediols

Abstract

We carried out the research on the modification of triacetate cellulose composite materials by oligodiurethanediols synthesized on the basis of a mixture of isomers of toluene diisocinate and aliphatic diols (individual or oligomeric) which differ in the length of the aliphatic chain between the hydroxyl groups and the nature of the hydroxy group itself. It was shown that used oligodiurethanediols are effective modifiers of the soluble triacetate cellulose compositions. At the stage of film casting, such additives allow governing the viscosity of the solution in a wide range and, at the same time, improving the physical and mechanical characteristics of the cast films (ensuring an increase in the tensile strength of the films by almost 2.5 times). This effect was achieved due to the presence of polar urethane groups in the structure of the modifier, which are formed at the stage of its synthesis, which have higher values of total cohesion energy (36.6 kJ/mol), in comparison with the ester groups (12.2 kJ/mol) of phthalate or adipinate plasticizers.