Thermal Properties of Poly(ester amide)s with Isolated, Two Adjacent and Three Adjacent Amide Groups within a Polyester Chain

Abstract

Abstract Differential scanning calorimetry (DSC) was employed to investigate the thermal properties of segmented aliphatic poly(ester amide)s (PEA)s. Three different series of PEAs were synthesized, each containing amide blocks of defined lengths which are randomly placed in the poly(butylene adipate) (PBA) backbone. Thus, the defined amide blocks consist of isolated amide groups, two adjacent amide groups or three adjacent amide groups. The PEAs show glass transition temperatures between −63 and 1 °C, melting temperatures between 28 and 183 °C and crystallization temperatures lie between −0.2 and 148 °C. The types of groups participating in the crystallization process and the length of the amide segments have an influence on the morphology of these polymers. magnified image