Toughness enhancement of poly(lactic acid) by melt blending with natural rubber

Ruedee Jaratrotkamjorn

Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand

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Chuanpit Khaokong,

Chuanpit Khaokong

Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand

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Varaporn Tanrattanakul,

Corresponding Author

Varaporn Tanrattanakul

[email protected]

Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand

Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand===Search for more papers by this author

Ruedee Jaratrotkamjorn,

Ruedee Jaratrotkamjorn

Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand

Search for more papers by this author

Chuanpit Khaokong,

Chuanpit Khaokong

Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand

Search for more papers by this author

Varaporn Tanrattanakul,

Corresponding Author

Varaporn Tanrattanakul

[email protected]

Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand

Bioplastic Research Unit, Department of Materials Science and Technology, Faculty of Science, Prince of Songkla University, Songkla 90112, Thailand===Search for more papers by this author

First published: 11 December 2011

https://doi.org/10.1002/app.35617

Citations: 156

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Abstract

Rubber toughened poly(lactic acid) (PLA) was prepared by blending with natural rubber (NR)-based polymers. The blends contained 10 wt % of rubber and melt blended with a twin screw extruder. Enhancement of impact strength of PLA was primarily concernced. This study was focused on the effect of rubber polarity, rubber viscosity and molecular weight on mechanical properties of the blends. Three types of rubbers were used: NR, epoxidized natural rubber (ENR25 and ENR50), and natural rubber grafted with poly(methyl methacrylate) (NR-g-PMMA). Effect of viscosity and molecular weight of NR, rubber mastication with a two-roll mill was investigated. It was found that all blends showed higher impact strength than PLA and NR became the best toughening agent. Viscosity and molecular weight of NR decreased with increasing number of mastication. Impact strength of PLA/NR blends increased after applying NR mastication due to appropriate particle size. DMTA and DSC characterization were determined as well. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011

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Volume124, Issue6

15 June 2012

Pages 5027-5036

Toughness enhancement of poly(lactic acid) by melt blending with natural rubber

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Toughness enhancement of poly(lactic acid) by melt blending with natural rubber

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