Poly(2-methyl-1,3-propane glycol terephthalate) was obtained by a transesterification condensation reaction of 2-methyl-1,3-propanediol and dimethyl terephthalate. The polymer has an intrinsic viscosity of 0.73 dL/g in chloroform, and its glass-transition temperature is 55 degrees C. The mean-square dipole moment of the chains per repeating unit, measured in dioxane solutions at several temperatures in the interval 20-60 degrees C, yields values of 4.17-4.07 D-2. Rotational isomeric state calculations of the polarity of the chains suggest that the gauche population about OCH2-CH(CH3)-CH2O bonds are disfavored with respect to that about the same bonds in poly(3-methyloxetane) [-OCH2-CH(CH3)-CH2-](n). The polymer crystallized from dilute solutions develops crystalline order although the chains are random stereochemical copolymers.