Influence of Comonomers on the Properties of Butylene Succinate Copolyesters

The properties of butylene succinate ternary copolymers containing aliphatic diols and dicarboxylic acids in an amount of 5 and 10 mol % as a third comonomer are studied. The copolymers have reduced strength characteristics compared to poly(butylene succinate). The heat of fusion, the glass transition temperature, the elastic modulus, the yield point, and the tensile strength of the copolymers decrease slightly with an increase in the weight content of third comonomer units. Stretching of copolymers during strength testing does not lead to their strain hardening. The degradation rate of copolymers in wet soil increases by 1.5–3.0 times relative to the rate of degradation of poly(butylene succinate) and grows with an increase in the proportion of the third comonomer.