For the enhancement of thermal stability of poly(p-dioxanone) (PPDO), the isocyanate end-capping reagent was prepared by treatment of toluene-2,4-diisocyanate with an equivalent
of 1-hexyl alcohol. The end-capping reagent and the end-capping PPDO with an inherent viscosity of 0.26 dL g−1 were characterized by FTIR and 1H-NMR. Thermal stability of the end-capping PPDO with an inherent viscosity of 0.92 dL g−1 was investigated isothermally and non-isothermally under air atmosphere using thermogravimetry. It has been shown that the
addition of the prepared isocyanate can enhance significantly the thermal stability of PPDO. The activation energies for non-isothermal
degradation estimated by Kissinger method and Friedman method are 91, 81 kJ mol−1 for as-prepared PPDO, and 160, 149 kJ mol−1 for the end-capping PPDO, respectively. The activation energy increases by about 70 kJ mol−1 through the end-capping.
Authors:Daoxing Sun, Chuanxin Xie, Fan Zhang, Jing Gu, and Jie Sun
Ding , SD , Bai , CY , Liu , ZP , Wang , YZ 2008 Enhanced thermal stability of poly( p -dioxanone) in melt by adding an end-capping reagent . J Therm Anal Calorim 94 : 89 – 95 10.1007/s10973-007-8469-x
Authors:Xing Wen, Xiuping Lu, Quan Peng, Fuyan Zhu, and Ning Zheng
, Antunes , MCM , Santos , AR , Felisbert , MI 2008 Blends of poly(3-hydroxybutyrate) and poly(p-dioxanone): miscibility, thermal stability and biocompatibility . J Mater Sci Mater Med 19 : 3535 – 3544 10.1007/s10856