The effect of OMMT reinforcement and annealing treatment on mechanical and thermal properties of Polyurethane Copolymer nanocomposites

This study focuses on a new fabrication of nanocomposite based on Polyurethane Copolymer (PUC) intercalated with organo-modified montmorillonite nanoparticles (OMMT), via an efficient combination of solution mixing and melt blending processes. The combination of solution mixing and melt interaction processes produced PUC/OMMT nanocomposites with enhanced properties. The OMMT filled PUC was characterised by TEM and tensile test. The effect of thermal treatment process was also studied due to subsequent microphase separation of PUC resulting from microdomain miscibility. TEM observation recognised a decent dispersion state of OMMT within PUC, owing to their exfoliated and intercalated structure. This morphology was greatly influenced by induced thermal treatment. The dynamic mechanical thermal analysis (DMTA) revealed that storage modulus and glass transition temperature of the nanocomposites increased with OMMT incorporation. The tensile modulus and tensile strength of nanocomposites showed an improvement with the addition of OMMT.

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Effect of banana fibers and plasticizer on melt processing of poly(vinyl alcohol)

Journal of Polymer Engineering ◽

10.1515/polyeng-2016-0105 ◽

2017 ◽

Vol 37 (4) ◽

pp. 335-343 ◽

Cited By ~ 1

Author(s):

Yottha Srithep ◽

Dutchanee Pholharn ◽

Onpreeya Veang-in ◽

Suphan Yangyuen

Keyword(s):

Mechanical Properties ◽

Crystallization Temperature ◽

Vinyl Alcohol ◽

Tensile Modulus ◽

Melt Processing ◽

Water Soluble ◽

Poly Vinyl Alcohol ◽

Mechanical And Thermal Properties ◽

Melt Blending ◽

Banana Fibers

Abstract Poly(vinyl alcohol) (PVOH) resin is one of the most widely used water-soluble biodegradable polymer. Because of thermal degradation, PVOH exhibits limited melt processing and lacks moldability. The effects of adding glycerol as plasticizer and banana fibers (BF) to PVOH on its moldability and mechanical property were investigated. Melt blending of PVOH with glycerol and/or BF was performed in an internal mixer. The blended materials were then compression molded to produce tensile specimens. Various characterization techniques were employed to study the mechanical properties, compatibility, and crystallization behavior of the PVOH blends. By melt blending with glycerol, PVOH could be processed but decreased the tensile modulus, tensile strength, and crystallization temperature. Furthermore, the addition of BF enhanced the mechanical and thermal properties and crystallization temperature of plasticized PVOH due to compatibility between the two components. Apart from enhancing the mechanical properties and thermal stability, the incorporation of BF can reduce the production cost.

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Mechanical and thermal properties of impact modified PBT blends and impact modified PBT nanocomposites

Journal of Polymer Engineering ◽

10.1515/polyeng-2012-0163 ◽

2013 ◽

Vol 33 (6) ◽

pp. 489-500 ◽

Cited By ~ 1

Author(s):

Ranjana Sharma ◽

Purnima Jain ◽

Susmita Dey Sadhu ◽

Bikramjit Kaur

Keyword(s):

Glycidyl Methacrylate ◽

Breaking Strength ◽

Tensile Modulus ◽

Detailed Comparison ◽

Mechanical And Thermal Properties ◽

Melt Blending ◽

Scanning Calorimetry ◽

Cloisite 30B ◽

The Impact ◽

Ethylene Methyl Acrylate

Abstract Elastomer toughened poly(butylene terephthalate) (PBT)/organoclay [Cloisite 30B, organo-montmorillonite (OMMT)] nanocomposites were prepared via melt blending using a micro-compounder. In this work, two types of impact modifiers, ultra low density polyethylene grafted glycidyl methacrylate (ULDPE-g-GMA, IM1) and ethylene-methyl acrylate-glycidyl methacrylate (E-MA-GMA, IM2) were used, and a detailed comparison of the effect of both was made. With respect to the impact strength, 2 wt% of ULDPE-g-GMA produced a better result as compared to 2 wt% E-MA-GMA. Therefore, 2 wt% of ULDPE-g-GMA is considered as the optimized percentage for the preparation of nanocomposites. Being an impact modifier, ULDPE-g-GMA decreases the yield stress, tensile modulus and breaking strength of pure PBT. This issue was addressed in this paper by using organoclay, which may improve the tensile properties of PBT materials. The content of ULDPE-g-GMA was kept constant, whereas organoclay (OMMT) content was varied from 2 to 5 wt% in nanocomposites. The melting and crystallization behavior of pure PBT, impact modified PBT and its nanocomposites were studied by differential scanning calorimetry (DSC). Crystalline morphology was investigated using polarizing optical microscopy (POM) at 185°C, 195°C, and 205°C crystallization temperatures. The optimum increase in tensile modulus of the elastomer toughened PBT nanocomposites was seen with a 3 wt% addition of organoclay.

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Effect of Organo-Modified Montmorillonite Nanoclay on Mechanical, Thermo-Mechanical, and Thermal Properties of Carbon Fiber-Reinforced Phenolic Composites

Polymers ◽

10.3390/polym13050754 ◽

2021 ◽

Vol 13 (5) ◽

pp. 754

Author(s):

Jantrawan Pumchusak ◽

Nonthawat Thajina ◽

Watcharakorn Keawsujai ◽

Pattarakamon Chaiwan

Keyword(s):

Thermal Properties ◽

Carbon Fiber ◽

Bending Strength ◽

Mechanical And Thermal Properties ◽

Fiber Reinforced ◽

Heat Resistant ◽

Degradation Temperature ◽

Modified Montmorillonite ◽

Carbon Fiber Reinforced ◽

Montmorillonite Nanoclay

This work aims to explore the effect of organo-modified montmorillonite nanoclay (O-MMT) on the mechanical, thermo-mechanical, and thermal properties of carbon fiber-reinforced phenolic composites (CFRP). CFRP at variable O-MMT contents (from 0 to 2.5 wt%) were prepared. The addition of 1.5 wt% O-MMT was found to give the heat resistant polymer composite optimum properties. Compared to the CFRP, the CFRP with 1.5 wt% O-MMT provided a higher tensile strength of 64 MPa (+20%), higher impact strength of 49 kJ/m2 (+51%), but a little lower bending strength of 162 MPa (−1%). The composite showed a 64% higher storage modulus at 30 °C of 6.4 GPa. It also could reserve its high modulus up to 145 °C. Moreover, it had a higher heat deflection temperature of 152 °C (+1%) and a higher thermal degradation temperature of 630 °C. This composite could maintain its mechanical properties at high temperature and was a good candidate for heat resistant material.

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Mechanical, Thermal, and Morphological Properties of Thermoplastic Starch/Poly(lactic acid/Poly(butylene adipate-co-terephthalate) Blends

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.970.312 ◽

2014 ◽

Vol 970 ◽

pp. 312-316

Author(s):

Sujaree Tachaphiboonsap ◽

Kasama Jarukumjorn

Keyword(s):

Lactic Acid ◽

Impact Strength ◽

Interfacial Adhesion ◽

Tensile Modulus ◽

Thermoplastic Starch ◽

Morphological Properties ◽

Poly Lactic Acid ◽

Melt Blending ◽

Elongation At Break ◽

Blending Method

Thermoplastic starch (TPS)/poly (lactic acid) (PLA) blend and thermoplastic starch (TPS)/poly (lactic acid) (PLA)/poly (butylene adipate-co-terephthalate) (PBAT) blend were prepared by melt blending method. PLA grafted with maleic anhydride (PLA-g-MA) was used as a compatibilizer to improve the compatibility of the blends. As TPS was incorporated into PLA, elongation at break was increased while tensile strength, tensile modulus, and impact strength were decreased. Tensile properties and impact properties of TPS/PLA blend were improved with adding PLA-g-MA indicating the enhancement of interfacial adhesion between PLA and TPS. With increasing PBAT content, elongation at break and impact strength of TPS/PLA blends were improved. The addition of TPS decreased glass transition temperature (Tg), crystallization temperature (Tc), and melting temperature (Tm) of PLA. Tgand Tcof TPS/PLA blend were decreased by incorporating PLA-g-MA. However, the presence of PBAT reduced Tcof TPS/PLA blend. Thermal properties of TPS/PLA/PBAT blends did not change with increasing PBAT content. SEM micrographs revealed that the compatibilized TPS/PLA blends exhibited finer morphology when compared to the uncompatibilized TPS/PLA blend.

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Tensile Properties of Polypropylene/Cocoa Pod Husk Biocomposites: Effect of Maleated Polypropylene

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.747.645 ◽

2013 ◽

Vol 747 ◽

pp. 645-648 ◽

Cited By ~ 9

Author(s):

Koay Seong Chun ◽

Salmah Husseinsyah ◽

Hakimah Osman

Keyword(s):

Tensile Strength ◽

Tensile Properties ◽

Tensile Modulus ◽

Melt Blending ◽

Elongation At Break ◽

Maleated Polypropylene ◽

Matrix Interaction ◽

Cocoa Pod Husk ◽

Blending Process ◽

Scanning Electron

Polypropylene/Cocoa Pod Husk (PP/CPH) biocomposites with different maleated polypropylene (MAPP) content were prepared via melt blending process using Brabender Plastrograph mixer. The tensile strength and tensile modulus of PP/CPH biocomposites increased with increasing of MAPP content. The PP/CPH biocomposites with 5 phr of MAPP showed the optimum improvement on tensile properties. However, the increased of MAPP content reduced the elongation at break of PP/CPH biocomposites. At 5 phr of MAPP content, PP/CPH biocomposites showed lowest elongation at break. Scanning electron microscope confirms the PP/CPH biocomposites with MAPP have better filler-matrix interaction and adhesion due to the effect of MAPP.

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Using Thermal Treatment Process to Enhance Anodic Oxidation TiO2 Nanotubes with High Degradation Effect of Methylene Blue

Sensors and Materials ◽

10.18494/sam.2018.1820 ◽

2018 ◽

pp. 655 ◽

Cited By ~ 1

Author(s):

Wei Chien ◽

Chi-Yu Lin ◽

Shang-Te Tsai ◽

Cheng-Fu Yang ◽

Chiu-Chen Chang ◽

...

Keyword(s):

Methylene Blue ◽

Thermal Treatment ◽

Anodic Oxidation ◽

Tio2 Nanotubes ◽

Treatment Process ◽

Degradation Effect

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Optimisation of the ceramic-like body for ceramifiable EVA-based composites

Science and Engineering of Composite Materials ◽

10.1515/secm-2015-0093 ◽

2017 ◽

Vol 24 (4) ◽

pp. 599-607 ◽

Cited By ~ 4

Author(s):

Xinhao Gong ◽

Tingwei Wang

Keyword(s):

Ceramic Body ◽

Ethylene Vinyl Acetate ◽

Melt Blending ◽

Red Phosphorus ◽

X Ray Diffraction ◽

Modified Montmorillonite ◽

Organically Modified Montmorillonite ◽

Organically Modified ◽

Dense Ceramic ◽

Acetate Copolymer

AbstractVarious ceramifiable ethylene-vinyl acetate copolymer (EVA) composites were prepared by melt blending with two kinds of glass frits, organically modified montmorillonite (OMMT) and whitened and capsulised red phosphorus (WCRP). The influence of different filler components and firing temperatures on the ceramifiable properties of the composites was studied. The dripping behaviour of the composites was analyzed by a vertical burning test. The microstructure of the residues was characterised by X-ray diffraction (XRD) and scanning electron microscopy. The results showed that the optimised EVA composite was free of melt dripping during burning with the addition of OMMT. A dimensionally stable and dense ceramic residue was also obtained, especially with the addition of WCRP. It was suggested that new phases were formed at firing temperatures, and WCRP could promote the formation of ceramic body which was not fused during firing at 900°C as evidenced by XRD.

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Influence of Silver / CNTs on Epoxide Resin Based Conductive Adhesive

Materials Science Forum ◽

10.4028/www.scientific.net/msf.610-613.299 ◽

2009 ◽

Vol 610-613 ◽

pp. 299-303

Author(s):

Shu Quan Liang ◽

Yan Tang ◽

Yong Zhang ◽

Zhong Jie ◽

Xiao Pin Tan

Keyword(s):

Tensile Strength ◽

Ultrasonic Method ◽

Silver Powder ◽

Tensile Modulus ◽

Conductive Adhesive ◽

Resin Matrix ◽

Epoxide Resin ◽

Weight Percentage ◽

Dispersion State ◽

Milling Method

Silver / CNTs was prepared by ball milling method and was used as filler to reinforce epoxide resin based conductive adhesive. The effect of content and dispersion state of the filler on tensile strength, tensile modulus, fracture extensibility and electrical resistance of the composites were studied. The results indicated that the filler could be dispersed well in epoxide resin matrix by ultrasonic method and the mechanical and electrical properties was improved greatly. The best content of the silver / CNTs was 0.75 wt% (considering of CNTs weight percentage), when the tensile strength, tensile modulus and fracture extensibility increased 42.6%, 18.8% and 115.3% respectively. With the increase of silver/CNTs, the conductivity of the matrix increased significantly. The micro structure analyses showed that the silver-covered CNTs worked as conductive channel and the electrons were easy to transfer through silver powder by CNTs network.

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Facile synthesis of ultrathin and perpendicular NiMn2O4 nanosheets on reduced graphene oxide as advanced electrodes for supercapacitors

Inorganic Chemistry Frontiers ◽

10.1039/c8qi00121a ◽

2018 ◽

Vol 5 (7) ◽

pp. 1714-1720 ◽

Cited By ~ 9

Author(s):

Long Li ◽

Hongli Hu ◽

Shujiang Ding

Keyword(s):

Graphene Oxide ◽

Energy Storage ◽

Thermal Treatment ◽

Reduced Graphene Oxide ◽

Treatment Process ◽

Facile Synthesis ◽

Storage Performance ◽

Reduced Graphene ◽

Co Precipitation ◽

Electrodes For Supercapacitors

A NiMn2O4 NSs@rGO nanocomposite was successfully fabricated through a facile co-precipitation and thermal treatment process, which exhibits enhanced energy storage performance.

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