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Mn of the produced HEURs obtained for reaction temperatures of 80, 95, and 110 °C (left). Mn for the prepolymers at 80 and 110 °C (right). The dashed lines have been added to guide the eye. Experiments were performed in at least three repetitions with the exception of the point of 120 min for 80 °C of the HEURs (left diagram).
