The Synthesis of Hydroxybutyrate-Based Block Polyurethane from Telechelic Diols with Robust Thermal and Mechanical Properties

Figure 4

GPC diagrams of PHB-diols (a, b, c) and PUHE copolymers (, , ). (a) Reaction time: 8 h; (b) reaction time: 6 h; (c) reaction time: 5 h.