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Effect of Poly(para-dioxanone) on the Hydrolytic Degradation of Poly(l-lactide)

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Abstract

Poly(l-lactide) (PLLA) was blended with various contents of poly(para-dioxanone) (PPDO; 5, 10, 15 and 20 wt%) by solution co-precipitation to modify the degradation characteristics of PLLA. As PPDO degrades rapidly, it can be advantageously used in blends with PLLA. The in vitro hydrolytic degradation of the PLLA/PPDO blends was studied by weight loss (WL) analysis, water absorption (WA), the thermal properties, the surface morphology and the mechanical properties of the samples in phosphate-buffered saline (pH 7.44) at 37 °C over 8 weeks. During the degradation process, the WL and WA increased significantly for all blends and a fenestral structure with defects was formed on the surface of blend bars as degradation progressed. Meanwhile, the glass transition temperature (T g), melting temperature (T m), tensile strength and breaking elongation of the blends decreased with time, whereas the hydrolysis rate of the blends varied with the blend composition. Compared with PLLA, PLLA/PPDO blends exhibited a higher hydrolysis rate.

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Acknowledgments

This work was supported by Grants from the National Natural Science Foundation of China (51103156), and the West Light Foundation of The Chinese Academy of Sciences.

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Authors and Affiliations

  1. Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, 610041, People’s Republic of China

    Xulong Xie, Wei Bai, Dongliang Chen & Chengdong Xiong

  2. University of Chinese Academy of Sciences, Beijing, 100039, People’s Republic of China

    Xulong Xie

  3. Zhejiang Engineering Research Center in Biodegradable Medical Materials, Dongyang, 322100, People’s Republic of China

    Wei Bai, Dongliang Chen, Chengdong Xiong & Xiubing Pang

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  1. Xulong Xie
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  2. Wei Bai
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  3. Dongliang Chen
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  4. Chengdong Xiong
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  5. Xiubing Pang
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Correspondence to Wei Bai.

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Xie, X., Bai, W., Chen, D. et al. Effect of Poly(para-dioxanone) on the Hydrolytic Degradation of Poly(l-lactide). J Polym Environ 23, 156–164 (2015). https://doi.org/10.1007/s10924-014-0670-y

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  • DOI: https://doi.org/10.1007/s10924-014-0670-y

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