Hydrolytic degradation behaviors of poly(p-dioxanone) in ambient environments
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- 作者：You Yuan (1)
Song-dong Ding (1)
Yin-qiao Zhao (1)
Yu-zhong Wang (1) - 关键词：Poly(p ; dioxanone) ; Hydrolytic degradation ; Temperature ; Relative humidity
- 刊名：Chinese Journal of Polymer Science
- 出版年：2014
- 出版时间：December 2014
- 年：2014
- 卷：32
- 期：12
- 页码：1678-1689
- 全文大小：1,622 KB
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24. Rockland, L.B., Anal. Chem., 1960, 32(10): 1375- 作者单位：You Yuan (1)
Song-dong Ding (1)
Yin-qiao Zhao (1)
Yu-zhong Wang (1)
1. College of Chemistry, Center for Degradable and Flame-Retardant Polymeric Materials, State Key Laboratory of Polymer Materials Engineering, National Engineering Laboratory of Eco-Friendly Polymeric Materials (Sichuan), Sichuan University, Chengdu, 610064, China- ISSN：1439-6203
- 作者单位：You Yuan (1)
文摘
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.