Sorption characteristic of organic liquid and its effect on the mechanical performance of a PLA‐based plastic |
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| Authors: | Indah Widiastuti Igor Sbarski SH Masood |
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| Affiliation: | 1. Research Group of Mechanical and Automotive Engineering Department of Mechanical Engineering Education, Sebelas Maret University, Surakarta, Indonesia;2. Industrial Research Institute, Swinburne University of Technology, Hawthorn, Melbourne, Australia |
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| Abstract: | The objective of this article is to assess the mechanical performance of PLA‐based materials under exposure of an organic liquid. In evaluating new opportunities of PLA‐based material, it is important to understand not only the chemical resistance of the material but also the potential route for degradation, which affect the mechanical behavior of the product during its service time. Degradation of PLA material with amount of sorption should be carefully controlled in order to maintain its mechanical performance in response to various loading condition. Distribution of the absorbed liquid within the package is firstly evaluated by identifying the characteristics of the mass transport. Gravimetric analysis is employed to investigate the liquid sorption mechanism and the induced expansion over a particular period. The profile of absorbed liquid content is numerically obtained and verified with the analytic solution. The changes in mechanical performances were investigated by measuring the properties of specimens containing saturated liquid content. It is found that at low temperature, the kinetics of liquid sorption follows the Fick's law but at higher temperature, it showed a deviation from the Fickian curve. The experiment results also confirm progressive decrease of the modulus and strength by increasing of fluid content inside the material. © 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016 , 133, 43250. |
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| Keywords: | biodegradable degradation mechanical properties |
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