Infrared and Raman studies on polylactide acid and polyethylene glycol-400 blend

Yuniarto, Kurniawan; Purwanto, Y. Aris; Purwanto, Setyo; Welt, Bruce A.; Purwadaria, Hadi K.; Sunarti, Titi Candra

doi:10.1063/1.4945555

Cited by 111 publications

(99 citation statements)

References 16 publications

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“…The degree of crystallinity, Tables and II, increases as the concentration of gelatin‐based plasticizer increases as observed in the previous studies . The increase of PLA crystallinity can be attributed to enhanced chain mobility in the presence of plasticizer .…”

Section: Resultssupporting

confidence: 73%

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Modification and extrusion coating of polylactic acid films

Cheng

Yang

et al. 2015

J of Applied Polymer Sci

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Polyethylene (PE) extrusion coating on paper substrates are the traditional packing material for coffee cups and take-out food containers. It is difficult to recycle the PE/paper laminates and the thin polymer films remain in landfills after the decomposition of their paper substrates. Disposal of plastic materials is causing serious effects on our environment and wildlife. Demand for compostable or biodegradable plastic packaging products is increasing because of consumer pressure and legislation. Biodegradable polylactic acid (PLA) is regarded as one of the most promising biopolymers with a large market potential, but its applications are limited by poor thermal stability, mechanical properties and processibility. We utilize modified gelatin as additives to improve PLA's performance without compromizing the biomass origin and compostable properties of the material. Extrusion coating, or extrusion casting, of polylactic acid (PLA) films onto paper substrates to form PLA/paper laminates was achieved by modification of the polymer with a plant or animal gelatin. Various paper substrates with thin PLA coatings were prepared using a conventional extrusion coating equipment for the fabrication of take-out food containers and coffee cups. Melt rheology of PLA and adhesion of the resulting thin film were greatly improved in the presence of a small amount of gelatin in the polymer matrices. V C 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42472.

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Section: Resultssupporting

confidence: 73%

“…On the other hand, Yuniarto et al . suggest that enhanced crystallization in the presence of the plasticizer, < 5%, lowers oxygen permeability of the modified PLA film . Oxygen transmission rate (OTR) increases if the PEG content exceeds 5%.…”

Section: Introductionmentioning

confidence: 99%

Modification and extrusion coating of polylactic acid films

Cheng

Yang

et al. 2015

J of Applied Polymer Sci

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“…Then, melting temperature decreased slightly from 167.72 °C to 167.26 °C. On the other hand, the crystallinity degree of plasticized PLA increased from 17.7% to 34.6% [6].…”

Section: Resultsmentioning

confidence: 95%

“…On the other hand, solubility and miscibility of PEG will decrease with increasing molecular weight [5]. Introducing PEG400 at about 5% into PLA created good barrier properties and a morphological structure, although it reduced the thermal properties of plasticized PLA film [6].…”

Section: Introductionmentioning

confidence: 99%

Thermal Properties, Crystallinity, and Oxygen Permeability of Na-montmorillonite Reinforced Plasticized Poly(lactic acid) Film

Yuniarto¹,

Purwanto²,

Purwanto³

et al. 2016

MST

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Introducing unmodified organically clay/Na-montmorillonite (Na-MMT) was applied into plasticized poly(lactic acid) PLA to produce film composites by direct casting. Film composite structure, the crystallinity degree and form, and thermal properties were carried out using X-ray diffraction and differential scanning calorimetry. The effect of Na-MMT to the tortuous path and the crystallinity degree in the plasticized film composites were calculated in oxygen barrier properties. Chromatogram film composites resulted in an intercalated structure that showed peak diffraction angle shift at about 0.2 o . Then, a peak diffraction pattern was indicated in α-form crystal structure. Plasticized PLA has a crystallinity degree at 34%, and the addition of Na-MMT increased to 52%. Glass transition temperature improved from 53 °C to 57 °C, and melting temperature remained stable at 167 °C. Filling Na-MMT into plasticized PLA caused to enhance a tortuous path about 28% and improved the oxygen permeability to 80%. As a result, the addition of Na-MMT of 3% into plasticized PLA during film composite preparation using the mixing method resulted in balancing properties related to the crystallinity degree, thermal properties, and oxygen barrier properties. AbstrakSifat Panas, Kristalinitas, dan Permeabilitas Oksigen Film Poly(lactic acid) Terplastisasi diperkuat Namontmorillonite. Pembuatan film komposit poly(lactic acid) terplastisasi PEG400 dengan bahan penguat Namonrmorillonite (NA-MMT) dilakukan dengan metode direct casting. Film komposit PLA terplastisasi dilakukan uji struktur komposit, sifat panas, derajat kristalinitas dan permeabilitas terhadap oksigen. Pengujian sifat panas dan penghitungan derajat kristal diperoleh dari pengukuran differential scanning calorimetry (DSC), analisis struktur komposit menggunakan xray diffraction (XRD) dan pengukuran permeabilitas oksigen menggunakan dynamic accumulation method. Film komposit PLA terplastisasi dengan bahan penguat Na-MMT menunjukkan terjadinya interkalasi polimer Na-MMT dengan pergeseran sudut difraksi sebesar 0.2 o . Stuktur kristal yang terbentuk memiliki bentuk alpha dan derajat kristal film komposit meningkat dari 34% menjadi 52%. Parameter sifat panas film PLA terplastisasi dengan bahan penguat Na-MMT mengalami perbaikan suhu transisi gelas dari 53 °C menjadi 57 °C meskipun suhu leleh tidak mengalami perubahan tetap bekisar pada nilai 167 °C. Peran Na-MMT membentuk jalur liku sebesar 20% sehingga terjadi peningkatan daya halang oksigen film komposit PLA terplastisasi yang ditunjukkan dengan penurunan nilai permeabilitas sebesar 80%. Penambahan Na-MMT sebesar 3% dalam pembuatan film komposit PLA terplastisasi cukup untuk mendapatkan keseimbangan perbaikan sifat panas, kristalisasi, dan daya halang oksigen.

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“…Indeed, barrier properties are critical for food packaging applications, since oxygen and water can augment microbiological activity, which in turn will boost food degradation. PET has an OTR of approximately 3000–4200 mL µm m −2 day −1 at 25 °C and different RHs and WVTR of around 420 g µm m −2 day −1 at 23 °C and 85% RH, while PLA shows an OTR ranging from 11 000 to 36 000 mL µm m −2 day −1 at 23 °C and a WVTR of 5250 g µm m −2 day −1 at 23 °C and 90% RH . In order for PLA to become an industrial alternative to PET, an even more significant reduction is therefore required.…”

Section: Introductionmentioning

confidence: 99%

Hybrid poly(lactic acid)/nanocellulose/nanoclay composites with synergistically enhanced barrier properties and improved thermomechanical resistance

Trifol

Plackett

Sillard

et al. 2016

Polymer International

113

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(2016). Hybrid poly(lactic acid)/nanocellulose/nanoclay composites with synergistically enhanced barrier properties and improved thermomechanical resistance. Polymer International, 65(8) Keywords:Cellulose nanofibres (CNF), nanoclay, polylactic acid (PLA), nanocomposites, barrier properties, thermomechanical properties Abstract:Poly(lactic acid) (PLA)-based hybrid nanocomposites (PLA, nanoclay and nanocellulose) were prepared by reinforcing neat PLA with commercially available nanoclay (Cloisite C30B) and nanocellulose, in the form of either partially acetylated cellulose nanofibres (CNF) or nanocrystalline cellulose (CNC).Composites with 1 or 5 wt% of nanocellulose, in combination with 1, 3 and 5 wt% of nanoclay, were prepared, and their barrier properties were investigated. It was found that the combination of clay and nanocellulose clearly results in synergistic behaviour in terms of the oxygen transmission rate (OTR) through a reduction of up to 90% in OTR and a further reduction in the water vapour transmission rate (WVTR) of up to 76%. In addition, the nanocomposite films showed improved thermomechanical resistance and improved crystallisation kinetics while maintaining high film transparency. This makes hybrid PLA/CNF/C30B nanocomposites a very promising material for food packaging applications.

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Infrared and Raman studies on polylactide acid and polyethylene glycol-400 blend

Cited by 111 publications

References 16 publications

Modification and extrusion coating of polylactic acid films

Modification and extrusion coating of polylactic acid films

Thermal Properties, Crystallinity, and Oxygen Permeability of Na-montmorillonite Reinforced Plasticized Poly(lactic acid) Film

Hybrid poly(lactic acid)/nanocellulose/nanoclay composites with synergistically enhanced barrier properties and improved thermomechanical resistance

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