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Table 3 Thermal properties of polyurethanes and their blends with PDLLA before and after incubation in hydrolytic (PBS) and oxidative (OX) solutions

From: Degradability of cross-linked polyurethanes based on synthetic polyhydroxybutyrate and modified with polylactide

Sample Incubation time (weeks) T m1 (°C) ΔH 1 (J/g) T m2 (°C) ΔH 2 (J/g) T m3 (°C) ΔH 3 (J/g)
PUR 10 0* 54.2 9.1 88.1 1.8 121.4 0.60
PUR 10 (PBS) 12 57.6 7.5 97.4 5.9
36* 60.6 12.3 99.0 5.3
PUR 10 (OX) 12 59.3 15.5 120.2 0.20
16* 56.9 14.5
PUR 10/PDLLA 0 51.9 18.6 121.9 0.01
PUR 10/PDLLA (PBS) 12 61.5 15.4 120.1 0.20
36 58.1 18.7 124.7 0.01
PUR 10/PDLLA (OX) 12 72.5 23.0 120.2 0.07
16 58.5 12.6 125.0 0.03
PUR 30 0* 54.1 15.9 94.8 0.7
PUR 30 (PBS) 12 58.8 10.9 105.4 3.8
36* 56.1 15.6 105.7 8.0
PUR 30 (OX) 12 61.3 12.9 119.9 0.30
16* 57.7 11.2 120.6 0.20
PUR 30/PDLLA 0 54.7 19.2 125.2 0.02
PUR 30/PDLLA (PBS) 12 64.0 11.7 120.5 0.10
36 54.1 18.9 124.4 0.10
PUR 30/PDLLA (OX) 12 61.7 9.0 120.2 0.06
16 58.8 16.8
  1. * Data presented in (Brzeska et al. 2017)