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Table 4 Thermal stability and proportions of the various collagen populations in historical leathers obtained by deconvolution of the full DSC peak

From: Micro differential scanning calorimetry and micro hot table method for quantifying deterioration of historical leather

Sample H/J g−1 T1/2/°C Tmax/°C Population G Population P Population L
T/°C % T/°C % T/°C %
BU-1 37.8 (4.6) 39.8 (3.5) 47.5 (3.6) 39.5 (3.6) 12 47.5 (3.6) 40 66.0 (3.6) 84.4 (3.2) 35 13
BU-2 31.3 (4.4) 28.9 (3.5) 47.0 (1.2) 47.0 (1.2) 59 65.4 (1.0) 82.8 (1.8) 31 10
BU-3 36.6 (3.6) 35.7 (2.8) 69.5 (1.2) 42.9 (2.0) 14 54.2 (1.8) 16 69.5 (1.2) 80.6 (1.5) 42 28
BU-4 7.3 (3.2) 10.7 (1.3) 38.5 (1.5) 38.5 (1.5) 78 55.0 (0.8) 22
BU-5 7.1 (2.0) 11.0 (1.5) 50.0 (4.9) 45.2 (5.9) 50.0 (4.9) 55.4 (3.1) 12 75 13
BU-6 28.9 (2.9) 14.7 (1.8) 48.2 (1.9) 33.6 (2.9) 5 48.2 (1.9) 60.3 (2.8) 74 6 76.6 (1.6) 84.9 (1.2) 6 9
BU-7 9.8 (0.7) 10.6 (1.1) 33.7 (0.9) 33.7 (0.9) 42.6 (1.2) 66 17 85.1 (1.6) 17
BU-8 16.6 (0.5) 6.5 (1.2) 66.2 (2.1) 66.2 (2.1) 75.7 (1.8) 81 19
BU-9 18.5 (1.4) 4.8 (0.3) 55.1 (0.7) 20÷30 7 55.1 (0.7) 64.9 (1.8) 82 11
BU-10 44.6 (2.7) 10.4 (1.9) 51.1 (1.1) 44.2 (1.4) 10 51.1 (1.1) 42 69.0 (0.9) 84.4 (1.4) 39 9
  1. The overall peak temperature, enthalpy and peak half-width are also reported
  2. Columns 2 to 4: data refer to the full DSC peaks. Columns 5 to 10: data refer to the deconvoluted DSC peaks. Uncertainty is the standard deviation