Synthese und eigenschaften von äthylenterephthalat-pleionomeren,

In order to synthesize the higher oligomers and pleionomers of ethylenterephthalate with methylester endgroups in pure form, the monomethylesterchlorides of the mono-. di-, and trimeric dicarboxylic acids were synthesized. The synthesis of the desired dimethylesters was effected by using the monomethylesterchlorides as earboxylic components and glycol and some oligoesterdiols as bifunctional fragments. The heptameric and higher dimethylesters can be considered pleionomers because they do not differ in some solubility, melting point, IR-spectrum, and DEBYE ogramm from the polymer.