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

Published online by Cambridge University Press:  31 October 2018

Yijun Guo ,
Jing Ma Open the ORCID record for Jing Ma [Opens in a new window] ,
Zirui Lv ,
Na Zhao ,
Lixia Wang  and
Qian Li
Yijun Guo
Affiliation:
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
Jing Ma*
Affiliation:
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
Zirui Lv
Affiliation:
School of Materials Science & Engineering, Zhengzhou University, Zhengzhou 450001, People’s Republic of China
Na Zhao
Affiliation:
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
Lixia Wang
Affiliation:
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
Qian Li
Affiliation:
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
*
a)Address all correspondence to this author. e-mail: jimmybear121@pku.edu.cn
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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.

Keywords

shape memoryplasticizersolvent evaporationblend
Type
Article
Information
Journal of Materials Research , Volume 33 , Issue 23 , 14 December 2018 , pp. 4101 - 4112
Copyright
Copyright © Materials Research Society 2018 

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References

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