High density polyethylene/cenosphere composites reinforced with multi-walled carbon nanotubes: Mechanical, thermal and fire retardancy studies

Divya, Velpula; Khan, Manzoor Ahmed; Rao, B. Nageshwar; Sailaja, R. R. N.

doi:10.1016/j.matdes.2014.08.076

Cited by 36 publications

(19 citation statements)

References 34 publications

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“…Cenosphere particle size and shape analysis is conducted using a Sympatec (Pennington, NJ) QICPIC high speed image analysis system . Surface treatment of cenospheres and HDPE functionalization are performed according to the procedures described in earlier publications . The cenospheres were analyzed by Fourier transform infrared (FTIR) spectroscopy to confirm the silane coating .…”

Section: Methodsmentioning

confidence: 99%

“…Three‐phase syntactic foams with HDPE matrix were studied with additional reinforcing phase of carbon nanotubes (CNT). Surface treatment of CNTs has also shown to improve the mechanical properties of these composites . Functionalized HDPE has been used with untreated glass hollow particle fillers resulting in a noticeable increase in the tensile modulus and strength with no change to fracture toughness, compared to the same syntactic foam without compatibilizer …”

Section: Introductionmentioning

confidence: 99%

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Effect of cenosphere surface treatment and blending method on the tensile properties of thermoplastic matrix syntactic foams

Kumar

Zeltmann

Doddamani

et al. 2016

J of Applied Polymer Sci

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The influence of cenosphere surface treatment and blending method on the properties of injection molded high-density polyethylene (HDPE) matrix syntactic foams is investigated. Cenospheres are treated with silane and HDPE is functionalized with dibutyl maleate. Tensile test specimens are cast with 20, 40, and 60 wt % of cenospheres using injection molding. Modulus and strength are found to increase with increasing cenosphere content for composites with treated constituents. Highest modulus and strength were observed for 40 and 60 wt % untreated mechanically mixed and treated brabender mixed cenospheres/HDPE blends, respectively. These values are 37 and 17% higher than those for virgin and functionalized HDPE. Theoretical models are used to assess the effect of particle properties and interfacial bonding on modulus and strength of syntactic foams. Brabender mixing method provided highest ultimate tensile and fracture strengths, which is attributed to the effectiveness of Brabender in breaking particle clusters and generating the higher particle-matrix surface area compared to that by mechanical mixing method. Theoretical trends show clear benefits of improved particle-matrix interfacial bonding in the strength results. V C 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43881.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of cenosphere surface treatment and blending method on the tensile properties of thermoplastic matrix syntactic foams

Kumar

Zeltmann

Doddamani

et al. 2016

J of Applied Polymer Sci

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“…HDPE (50 g) is mixed with 5 ml of dibutyl maleate (functionalizer) and 0.15 g of dicumyl peroxide (initiator for compatibilization between silane coated cenosphere and functionalized HDPE). The blend was mixed in the Brabender (CMEI, MODEL-16 CME SPL, Western Company Keltron) at 165C for 10 minutes [22][23][24]. These surface treated constituents are also pre-mixed mechanically and loaded in PIM.…”

Section: Fabrication Processmentioning

confidence: 99%

Processing of cenosphere/HDPE syntactic foams using an industrial scale polymer injection molding machine

et al. 2016

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Rapid production of high quality components is the key to cost reduction industrial applications.The present work is the first attempt of manufacturing syntactic foams, hollow particle filled lightweight composites, using an industrial scale injection molding machine. High density polyethylene (HDPE) is used as the matrix material and fly ash cenospheres are used as the filler. Development of syntactic foams with cenospheres serves dual purpose of beneficial utilization of industrial waste fly ash and reduction in the cost of the component. The pressure and temperature used in injection molding process are optimized to minimize fracture of cenospheres and obtain complete mixing of cenospheres with HDPE. The optimized parameters are used for manufacturing syntactic foams with 20, 40 and 60 wt.% cenospheres. With increasing cenosphere content, density and strength reduce and modulus increases. Surface modification of constituents results in rise in strength with increasing filler content. A theoretical model based on a differential scheme is used to estimate the properties of cenospheres by conducting parametric studies because of inherent difficulties in direct measurement of cenosphere properties. The potential for using the optimized injection molding process is demonstrated by casting several industrial components.

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“…Padal et al (2014) states that addition of the nanoparticles in the epoxy showed better mechanical and thermal properties like storage modulus, glass transition temperature, compared to the plain epoxy. Divya et al (2015) showed that the mechanical & thermal properties showed synergism when both cenospheres and MWCNT were added and hence led to their improvement. In an investigation done by Arijit et al (2011) the damping properties of cenosphere filled polypropylene composites enhanced and is particularly observed in 10 wt% cenosphere.…”

Section: Introductionmentioning

confidence: 99%

An investigation of fracture toughness and dynamic mechanical analysis of polymer nano-composites

Raju¹,

Rajeswari²,

Balannavar³

et al. 2018

Int. J. Eng. Sci. Tech

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The study deals with development of a new composite material with an objective to increase the mechanical and thermal properties. The proposed work involves the preparation of novel polymer based composite material reinforced with cenosphere and multi walled carbon nanotubes (MWCNTs) and to investigate fracture toughness and dynamic mechanical properties. MWCNTs have high tensile strength which contributes to increase in strength of composite as well as the load transfer capability. The 20 weight % of cenosphere and upto 0.5wt% of MWCNTs are used for the study. Dynamic mechanical analysis and fracture toughness tests of the composite were carried out. It was found that fracture toughness of the sample with 0.2 wt% MWCNT increased by 12% than the epoxy cenosphere composite. The results obtained by experimental test are compared with the simulation results. Thermal properties obtained by DMA have shown better thermal stability. The SEM analysis was carried out to study the interfacial bonding between the fiber-matrix and also to substantiate the fracture toughness result.

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High density polyethylene/cenosphere composites reinforced with multi-walled carbon nanotubes: Mechanical, thermal and fire retardancy studies

Cited by 36 publications

References 34 publications

Effect of cenosphere surface treatment and blending method on the tensile properties of thermoplastic matrix syntactic foams

Effect of cenosphere surface treatment and blending method on the tensile properties of thermoplastic matrix syntactic foams

Processing of cenosphere/HDPE syntactic foams using an industrial scale polymer injection molding machine

An investigation of fracture toughness and dynamic mechanical analysis of polymer nano-composites

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