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The effect of plasticizer on the shape memory properties of poly(lactide acid)/poly(ethylene glycol) blends

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Abstract

Biodegradable poly(lactide acid) (PLA) has been well-studied as a shape memory polymer in recent years, but the brittleness and relatively high Tg limit its applications. In this study, a series of PLA/poly(ethylene glycol) (PEG) blends were manufactured by using the solvent evaporation method. The thermal behaviors, morphology, hydrophilicity, and mechanical properties of the samples with different contents of PEG have been experimentally studied by differential scanning calorimetry, scanning electronic microscopy, water contact angle, dynamic mechanical analysis, and tensile test. Furthermore, the influence of PEG on the shape memory properties under different loading conditions including the stretch strain, recovery temperature, deformation temperature, and tensile rate were explored systematically. Experimental results reveal that introduction of appropriate contents of the plasticizer PEG into the PLA/PEG systems results in the significant improvement of morphology, hydrophilicity, and mechanical properties while the high shape memory properties are still retained.

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ACKNOWLEDGMENT

The authors would like to sincerely thank the financial support from the National Natural Science Foundation of China (11502238 and 11372287), the International Science & Technology Cooperation Program of China (Grant No. 2015DFA30550), the China Postdoctoral Science Foundation (Grant Nos. 2016M592307 and 2017M610460), the Opening Fund of National Center for International Research of Micro-nano Molding Technology (MMT2017-05), and the International Science & Technology Cooperation Program of Henan (172102410076 and 173102410062).

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  1. China National Center for International Joint Research of Micro-nano Molding Technology, School of Mechanics & Engineering Science, Zhengzhou University, Zhengzhou, 450001, People’s Republic of China

    Yijun Guo, Jing Ma, Na Zhao, Lixia Wang & Qian Li

  2. School of Materials Science & Engineering, Zhengzhou University, Zhengzhou, 450001, People’s Republic of China

    Zirui Lv

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  1. Yijun Guo
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Correspondence to Jing Ma.

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Guo, Y., Ma, J., Lv, Z. et al. The effect of plasticizer on the shape memory properties of poly(lactide acid)/poly(ethylene glycol) blends. Journal of Materials Research 33, 4101–4112 (2018). https://doi.org/10.1557/jmr.2018.359

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