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HomeKey Engineering MaterialsKey Engineering Materials Vol. 856Crystallization Behaviors of Plasticized...

Crystallization Behaviors of Plasticized Poly(Lactic Acid)/Microcrystalline Cellulose Composite Sheet

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Abstract:

Poly(lactic acid) (PLA) is a potential biodegradable polymer to replace petroleum-based plastic, however, its main drawback is brittleness because of slow crystallization rate. To overcome this limitation, compounding with some additives is the most chosen choice due to easy and effective preparation. In this study, an epoxidized soybean oil (ESO) and a microcrystalline cellulose (MCC) were applied as a plasticizer and a nucleating agent, respectively. The PLA was compounded with ESO and MCC by using a twin-screw extruder. The product sheets were prepared by using a chill-roll cast film extruder. Change of thermal property after adding ESO and MCC was investigated by a differential scanning calorimeter. Mechanical property of the prepared sheet was carried out by using a universal testing machine in a tensile mode. Microstructure of the sheets was also studied by wide angle X-ray diffraction (WAXD) and small angle X-ray scattering (SAXS) techniques. The results showed that ESO assisted plasticization while the MCC induced crystallization of PLA. Also, ESO and MCC eased flowability and alignment of PLA microstructure in machine direction.

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Periodical:

Key Engineering Materials (Volume 856)

Pages:

303-308

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.856.303

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Online since:

August 2020

Authors:

Suttinun Phongtamrug*, Sirisart Ouajai

Keywords:

Composite Sheet, Crystallization Behavior, Microcrystalline Cellulose, Poly(Lactic Acid)(PLA)

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* - Corresponding Author

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