The synthesis and properties of PBAT can be seen in the article
Jacquel, N., et al., Synthesis and properties of poly (butylene succinate): Efficiency of different transesterification catalysts.Journal of Polymer Science Part A: Polymer Chemistry, 2011. 49(24): p. 5301-5312
Dear Yuri Mirgorod it's interesting to see that we recommend each other's answers, but the questioner does not. Apparently the answers were not helpful...