Abstract
The effects of temperature and relative humidity on the hydrolytic degradation of poly(p-dioxanone) (PPDO) were investigated. The hydrolytic degradation behaviors were monitored by tracing the changes of water absorption, mechanical and crystalline properties, molecular weight and its distribution, surface morphologies, as well as infrared absorption peaks and hydrogen chemical shifts during the degradation. It is found that the water absorption increases whilst the intrinsic viscosity, tensile strength and elongation at break decrease as the temperature or relative humidity increases. With degradation time growing, the molecular weight drops and its distribution broadens. The crystallinity of PPDO has a tendency to increase at first and then to decrease, while the crystalline structure is not significantly changed. At the same time, some cracks are observed on the surface and keep growing and deepening. All results show that temperature plays more significant roles than relative humidity during the degradation. The analyses of Fourier transform infrared spectroscopy and hydrogen nuclear magnetic resonance spectroscopy reveal that the degradation of PPDO is a predominant hydrolysis of ester linkages.
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This work was financially supported by the National Natural Science Foundation of China (No. 51121001), High-Tech Research & Development Program (No. 2012AA062904) and the Program for Changjiang Scholars and Innovative Research Teams in Universities of China (IRT 1026).
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Yuan, Y., Ding, Sd., Zhao, Yq. et al. Hydrolytic degradation behaviors of poly(p-dioxanone) in ambient environments. Chin J Polym Sci 32, 1678–1689 (2014). https://doi.org/10.1007/s10118-014-1545-3
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DOI: https://doi.org/10.1007/s10118-014-1545-3