Enhanced Mechanical Properties of Organo-Clay Based UHMWPE Nanocomposite Films

Rafiq, Ahmed; Syed, Kausar Ali

doi:10.6000/1927-5129.2016.12.34

Cited by 2 publications

(1 citation statement)

References 22 publications

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“…2 Although UHMWPE possesses many excellent properties but its poor adhesion to fillers, lower thermal stability, high melt viscosity, and creep are the main hurdles for its vast spread engineering applications. 3 In order to improve these properties, inorganic particles were often used as reinforcement or filler materials. 4,5 Clay–polymer nanocomposites have recently attracted a great deal of attention as they offer enhanced mechanical and thermal properties when compared to the pure polymer.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted melt mixing for the preparation of UHMWPE/OMMT nanocomposites

Wang

Yin

et al. 2017

Journal of Thermoplastic Composite Materials

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Ultrahigh molecular weight polyethylene (UHMWPE)/organic montmorillonite (OMMT) nanocomposites were prepared via a self-made vane mixer which could supply a synergy of ultrasound and extensional deformation. Structure and working principle of this novel mixer were illustrated in detail. Effects of the OMMT content, mixing time, and ultrasound treat time on composites’ morphology, rheological properties, and thermal properties were reported in terms of transmission electron microscopy (TEM), wide-angle X-ray scattering, differential scanning calorimetry (DSC), and thermogravimetric analysis (TGA). X-ray diffraction (XRD) and TEM showed that the OMMT lay spacing increased from 2.82 nm to 3.29 nm and OMMT dispersed evenly in the matrix using this novel melt mixing equipment. It certified that the melt mixing procedure synergized by ultrasound and extensional deformation was very effective in the exfoliation of silicate layers and also the filler distribution and dispersion. DSC measurements revealed that the crystallization temperature ( Tc) had no visible change with increasing the OMMT content and the melting temperature ( Tm) and melting enthalpy crystallinity ( Xc) increased with the proper OMMT content. The higher Tm and Xc showed with the proper ultrasound treatment time, however, the Tc had no visible change. TGA showed that the onset temperature at which 20% weight loss of the material increased markedly in the case of UHMWPE/OMMT-1 wt% nanocomposite. The onset temperature slightly decreased with the use of ultrasound. Rheological analyses showed that all the samples exhibited non-Newtonian and shear thinning characteristics. Both the storage modulus and complex viscosity increased with continuous addition of the OMMT layers. It also indicated that the introduction of ultrasound tended to decrease the storage modulus and complex viscosity. Universal tensile test indicated that superior tensile strength occurred in samples containing OMMT layers.

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Section: Introductionmentioning

confidence: 99%

Ultrasound-assisted melt mixing for the preparation of UHMWPE/OMMT nanocomposites

Wang

Yin

et al. 2017

Journal of Thermoplastic Composite Materials

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Preparation and characterization of CNTs/UHMWPE nanocomposites via a novel mixer under synergy of ultrasonic wave and extensional deformation

Yin

Li²,

et al. 2018

Ultrasonics Sonochemistry

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In this work, design and development of a new melt mixing method and corresponding mixer for polymer materials were reported. Effects of ultrasonic power and sonication time on the carbon nanotubes (CNTs) filled ultra high molecular weight polyethylene (UHMWPE) nanocomposites were experimentally studied. Transmission Electron Microscopy images showed that homogeneous dispersion of CNTs in intractable UHMWPE matrix is successfully realized due to the synergetic effect of ultrasonic wave and extensional deformation without any aid of other additives or solvents. Differential scanning calorimetry results revealed an increase in crystallinity and crystallization rate due to the finer dispersion of the CNTs in the matrix which act as nucleating point. Composites' complex viscosity and storage modulus decreased sharply at first and then leveled off with the increase of sonication time or the ultrasonic power. The thermal stability and the tensile strength of the CNTs/UHMWPE nanocomposites improved by using this novel mixing method. This is the first method that combined the ultrasonic wave and the extensional deformation in which the elongation rate, sonication time and ultrasonic power can be adjusted simultaneously during mixing. The novel mixer offers several advantages such as environment-friendly, high mixing efficiency, self-cleaning and wide adaptability to materials.

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Enhanced Mechanical Properties of Organo-Clay Based UHMWPE Nanocomposite Films

Cited by 2 publications

References 22 publications

Ultrasound-assisted melt mixing for the preparation of UHMWPE/OMMT nanocomposites

Ultrasound-assisted melt mixing for the preparation of UHMWPE/OMMT nanocomposites

Preparation and characterization of CNTs/UHMWPE nanocomposites via a novel mixer under synergy of ultrasonic wave and extensional deformation

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