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Miscibility, Thermal and Mechanical Properties of Poly(para-dioxanone)/Poly(lactic-co-glycolic acid) Blends

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Abstract

A series of biodegradable polymers was prepared by solution co-precipitation of poly(para-dioxanone) (PPDO) and poly(lactic-co-glycolic acid) (PLGA) in various blend ratios. Samples were compression-molded into bars using a platen vulcanizing press. The miscibility, thermal and mechanical properties of the materials were investigated using differential scanning calorimetry (DSC), polarized optical microscopy, and scanning electron microscopy (SEM). Dynamic contact angle was used to characterize the water wettability of PLGA/PPDO blends. The mechanical properties of blends and pure polymers were measured by tensile tests. The position of the glass transition temperatures (T g ) was dependent upon composition. When 10 % PLGA was added into PPDO, the DSC curve revealed only one T g (−7.35 °C) which was located between the T g values of PPDO and PLGA. When 20 % PLGA was added into the blend, two independent T g values for PPDO/PLGA blends were observed, and such characteristics improved further upon addition of 30 % PLGA. SEM images of fractured surfaces displayed evidence of the morphology of PPDO/PLGA blends that were consistent with the DSC results. Hence, a relationship was found between homogeneity and the contents of PLGA in the blend. The compatibility of the blends increased with addition of small amounts of PLGA, followed by a leveling-off at higher content.

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Acknowledgments

This work was supported by 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. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Chengdu, 610500, People’s Republic of China

    Yang Bai, Pingquan Wang & Wei Bai

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

    Wei Bai, Lifang Zhang, Qing Li & Chengdong Xiong

Authors
  1. Yang Bai
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  2. Pingquan Wang
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  3. Wei Bai
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  4. Lifang Zhang
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  5. Qing Li
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  6. Chengdong Xiong
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Correspondence to Wei Bai.

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Bai, Y., Wang, P., Bai, W. et al. Miscibility, Thermal and Mechanical Properties of Poly(para-dioxanone)/Poly(lactic-co-glycolic acid) Blends. J Polym Environ 23, 367–373 (2015). https://doi.org/10.1007/s10924-014-0686-3

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  • DOI: https://doi.org/10.1007/s10924-014-0686-3

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