Mechanical Properties of Unsaturated Polyester / Montmorillonite Composites

Inceogul, A. B.; Yilmazer, Ülkü

doi:10.1557/proc-703-v9.23

Cited by 8 publications

(8 citation statements)

References 8 publications

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“…However, Na-MMT of 5% decreased T g because excessing Na-MMT reduced the crosslinking between matrix polymer and MMT. Other researchers reported the reduced T g plastic polymer based on polyester because of the crosslinking between MMT and plasticized PLA matrix [22]. Surprisingly, the melting temperature of plasticized PLA/Na-MMT remained stable at about 167°C.…”

Section: Resultsmentioning

confidence: 94%

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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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Section: Resultsmentioning

confidence: 94%

“…Other researchers reported the reduced T g plastic polymer based on polyester because of the crosslinking between MMT and plasticized PLA matrix [22].…”

Section: Resultsmentioning

confidence: 98%

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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“…The increase in the Tg of the nanocomposites can be attributed to the high degree of adhesion between the polymer and graphene nanoparticles. The nano-size of the graphene would restrict movement near the organic-inorganic interface [31].…”

Section: Resultsmentioning

confidence: 99%

Preparation and Study of the Mechanical Properties of Unsaturated Polyester Resin/Graphene Nanocomposite

Attiya

Al‐Saadi

Watan

2019

SSP

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Nanocomposite was prepared using unsaturated polyester (UP) resin as a matrix and graphene nanoparticles as a reinforcement material in six percentage weights (0, 0.1, 0.2, 0.3, 1 and 1.5%). Mechanical, calorimetric and thermal studies were performed on the (UP) resin/graphene nanocomposite. All tests showed a clear improvement of all mechanical properties examined (hardness, flexural strength (F.S), impact strength (I.S) and tensile strength (T.S)) with increasing graphene percentage. In addition, the temperature of glass transition and thermal conductivity of this composite increased with increasing graphene content.

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“…All tests were carried out by temperature sweep method (temperature ramp from 30 C to 130 C at 5 C min À1 ) at a constant frequency of 1 Hz. The temperature applied was within the range used by Jawahar and Balasubramanian 54 and Inceogul and Yilmazer 55 The maximum force of DMA was 10 N and applied during all DMA tests. SEM analysis using a FEI Quanta 200 was carried out of the fractured surfaces of tensile specimens to evaluate the fracture modes in the samples.…”

Section: Methodsmentioning

confidence: 99%

The degradation of mechanical properties in halloysite nanoclay–polyester nanocomposites exposed to diluted methanol

Saharudin

Atif

Shyha

et al. 2016

Journal of Composite Materials

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The degradation of mechanical properties in halloysite nanoclay–polyester nanocomposites was studied after an exposure of 24 h in diluted methanol system by clamping test specimens across steel templates. The glass transition temperature ( Tg) and storage modulus increased steadily with the increase of halloysite nanoclays before and after diluted methanol exposure. The addition of nano-fillers was found to reduce liquid uptake by 0.6% in case of 1 wt% reinforcement compared to monolithic polyester. The mechanical properties of polyester-based nanocomposites were found to decrease as a result of diluted methanol absorption. After diluted methanol exposure, the maximum microhardness, tensile, flexural and impact toughness values were observed at 1 wt% of halloysite nanoclay. The microhardness increased from 203 to 294 HV (45% increase). The Young’s modulus increased from 0.49 to 0.83 GPa (70% increase) and the tensile strength increased from 23 to 27 MPa (17.4% increase). The impact toughness increased from 0.19 to 0.54 kJ/m2 in diluted methanol system (184% increase). Surprisingly, the fracture toughness of all types of nanocomposites was found to increase after exposing to diluted methanol due to plasticization effect. Scanning electron microscope images of the fractured surfaces of tensile specimens revealed that the methanol increased the ductility of the matrix and reduced the mechanical properties of the nanocomposites.

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Mechanical Properties of Unsaturated Polyester / Montmorillonite Composites

Cited by 8 publications

References 8 publications

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

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

Preparation and Study of the Mechanical Properties of Unsaturated Polyester Resin/Graphene Nanocomposite

The degradation of mechanical properties in halloysite nanoclay–polyester nanocomposites exposed to diluted methanol

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