Analysis of the Thermal Behavior of Poly(lactic acid)/ Montmorillonoid (I.34TCN) Composites

Poly (lactic acid) (PLA) is a useful alternative to petrochemical commodity material used in such as in food packaging industries. Due to its inherent brittleness, low thermal stability, and poor crystallization, it needs to improve its properties, namely in terms of thermal and mechanical performance. The plasticized PLA composites reinforced with nanofiller were prepared by solvent casting and hot press methods. Thermal and mechanical properties, as well as the crystallinity study of these nanocomposites, were investigated to study the effect of tributyl citrate (TBC) and TiO2 on the PLA composites. The addition of TBC improved the flexibility and crystallinity of the composites. Reinforcement of TiO2 was found as a practical approach to improve the mechanical properties, thermal stability, and enhanced crystalline ability for plasticized PLA nanocomposites. Based on the results achieved in this study, the composite with 3.5% nanofiller (pPLATi3.5) presented the optimum set of mechanical properties and improved thermal stability.

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Viscoelastic and thermal behavior of woven hemp fiber reinforced poly(lactic acid) composites

Composites Part B Engineering ◽

10.1016/j.compositesb.2011.10.021 ◽

2012 ◽

Vol 43 (3) ◽

pp. 856-860 ◽

Cited By ~ 67

Author(s):

Young Seok Song ◽

Jung Tae Lee ◽

Dong Sun Ji ◽

Myung Wook Kim ◽

Seung Hwan Lee ◽

...

Keyword(s):

Lactic Acid ◽

Thermal Behavior ◽

Poly Lactic Acid ◽

Fiber Reinforced ◽

Hemp Fiber

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Thermomechanical Properties and Thermal Behavior of Poly(Lactic Acid) Composites Reinforced with TiO2 Nanofiller

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.317.341 ◽

2021 ◽

Vol 317 ◽

pp. 341-350

Author(s):

Nur Ain Syafiqah Sudin ◽

Norlinda Daud ◽

Izan Roshawaty Mustapa ◽

Mohammed Zorah

Keyword(s):

Mechanical Properties ◽

Lactic Acid ◽

Thermal Behavior ◽

Storage Modulus ◽

Medical Engineering ◽

Physical And Mechanical Properties ◽

Mechanical Analysis ◽

Thermomechanical Properties ◽

Filler Loading ◽

Poly Lactic Acid

The reinforcement effect of nanofiller in polymer enhanced the thermal stability, physical and mechanical properties of poly (lactic acid) (PLA) composites with good reinforcing capabilities for bio-based polymers. In this paper, the effect of reinforcement of titanium dioxide (TiO2) nanofiller on the mechanical properties and thermal behavior of PLA matrix are reported. PLA/TiO2 nanocomposites with different percentages of 2.0, 3.5, 5.0 and 7.0 %∙w/w were prepared by using solvent casting method and hot press machine. TiO2 were dispersed in PLA matrix using mechanical mixer and ultrasonication technique. The mechanical properties and thermal behavior of PLA nanocomposites were characterized using dynamic mechanical analysis (DMA) and differential scanning calorimeter (DSC). The increased in storage modulus by the addition of nanofiller with the highest increment provided by 2.0 %·w/w TiO2 indicated a strong influence and better interfacial bonding between nanofiller and PLA matrix. An increased in storage modulus started at 100 °C that linked to the cold crystallization (Tcc) of PLA composites is in agreement with DSC result. The Tcc shifted to higher temperature as the content of nanofiller increased and this result were observed at 2.0 %·w/w of the nanofiller content. Reinforcement of nanofiller increased the melting temperature from lower filler loading until 5.0 %·w/w. The incorporation of TiO2 nanofiller as the reinforcement agent for PLA has a potential in biopolymer medical engineering and packaging industry, a highly competitive application with a great demand of cost and performance.

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