Plastic

$\ln \left(\frac{k}{T}\right)-\frac{1}{T}$

R²

$\text{Slope}=-\frac{\Delta H^{\ne }}{R}$

∆H^≠,

kJ/mol

$\text{Intercept}=23.76+\frac{\Delta S^{\ne }}{R}$

∆S^≠

J/molK

PP

$\ln {\left(\frac{k}{T}\right)}_{\text{PP}}=-\frac{18.826}{T}+13.202$

0.9557

−18.826

156.52

13.202

−87.71

HDPE

$\ln {\left(\frac{k}{T}\right)}_{\text{HDPE}}=-\frac{23.547}{T}+18.167$

0.9482

−23.547

195.77

18.167

−46.48

$\Delta G^{\ne }=\Delta H^{\ne }-T\Delta S^{\ne }$ , kJ/mol

T, K

PP

HDPE

673

215.55

688

216.86

703

218.18

228.45

718

219.50

229.14

733

229.84

748

230.54