Effect of simple shear induced orientation process on the morphology and properties of polyolefin/graphite nanoplates composites

Белошенко, В. А.; Voznyak, Andrei; Voznyak, Yu. V.; Новокшонова, Л. А.; Grinyov, V. G.

doi:10.1016/j.compscitech.2016.12.009

Cited by 16 publications

(17 citation statements)

References 34 publications

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“…It is interesting that at sufficiently high concentration of CNTs (10 wt%) and large accumulated plastic strain (up to 8.5), the nanocomposite structures do not demonstrate any pores between CNTs (shown in Supporting Information). As we demonstrated before by the example of the polyolefin–graphite nanoplates composites , this fact is also determined by the effect of high pressure.…”

Section: Resultssupporting

confidence: 92%

“…On the other hand, controlled molecular orientation is achieved by a change of the shear plane position . Although SPD process such as ECAE is found to improve dispersion of the nanofiller within the polymeric matrix as well as modified aspect ratio, another innovative method such as ECMAE appears even more effective. In particular, ECMAE is known to improve the exfoliation and intercalation of nanofillers as well as to enhance interfacial adhesion, degree of crystallinity, to reduce porosity, to induce strong molecular orientation and an alignment of fillers .…”

Section: Introductionmentioning

confidence: 99%

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Effects of orientation ordering of low‐density polyethylene—multi‐walled carbon nanotubes composites determined by severe plastic deformation

Белошенко

Voznyak

Vozniak

et al. 2018

Polymer Engineering & Sci

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In this work, by the example of the system of linear low‐density polyethylene—multi‐walled carbon nanotubes (LLDPE/CNTs), specific features of the nanocomposite structure modified by severe plastic deformation (SPD) are studied. The effect of SPD on the mechanical properties and electrical conductivity is analyzed. It is shown that SPD leads to destruction of CNTs aggregates and more homogeneous their distribution. CNTs formed structure is characterized by the presence of large (200–300 nm) aggregates of CNTs and small (<100 nm) CNTs aggregates. It is found that within the range of a small degree of strain (up to e = 4.4), rupture is the prevailing mechanism of agglomerate disintegration, and erosion dominates in the range of high strain (e = 4.4–8.5). SPD‐induced formation of a 3D‐conducting network of CNTS and strengthened LLDPE matrix determines an enhanced set of electrical and mechanical characteristics of the tested composites. POLYM. ENG. SCI., 59:714–723, 2019. © 2018 Society of Plastics Engineers

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Section: Resultssupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Effects of orientation ordering of low‐density polyethylene—multi‐walled carbon nanotubes composites determined by severe plastic deformation

Белошенко

Voznyak

Vozniak

et al. 2018

Polymer Engineering & Sci

Self Cite

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“…Polyolefin‐based nanocomposites have received a great deal of attention over past decades because of their multifaceted applications and cost‐effective production on a very large scale. The wide applicability of such polyolefin nanocomposites arises due to their unique tailorable properties such as mechanical strength, gas permeability, insulation and thermal stability . Polyolefin‐based thermoplastics, essentially polyethylene, polypropylene (PP), polymethylpentene and polybutene‐1), have been widely used over a spectrum of applications.…”

Section: Introductionmentioning

confidence: 99%

“…However, the enhancement of optical, thermal and mechanical properties of LDPE to meet these various demands is still a challenge. Previous studies have indicated that addition of carbonaceous nanomaterials such as graphite, graphene, graphene oxide and carbon nanotubes into thermoplastics improves the physicochemical properties of the polyolefins . Several techniques such as melt mixing process, in situ synthesis and solvent casting have been implemented to fabricate polyolefin nanocomposites with enhanced mechanical, thermal and diffusion properties compared with the neat polyolefins.…”

Section: Introductionmentioning

confidence: 99%

“…Several techniques such as melt mixing process, in situ synthesis and solvent casting have been implemented to fabricate polyolefin nanocomposites with enhanced mechanical, thermal and diffusion properties compared with the neat polyolefins. The incorporation of graphene with polyolefins has been proven to increase the degree of crystallinity, which leads to an increase in ductility, rigidity and strength of the nanocomposites …”

Section: Introductionmentioning

confidence: 99%

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Physicochemical properties of reduced graphite oxide conglomerated polyethylene nanocomposites

Toh

Ong

Bindumadhavan

et al. 2018

Polymer International

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The variation in physicochemical properties on incorporation of unmodified reduced graphite oxide (rGO) into a low‐density polyethylene (LDPE) matrix has received much attention. Herein, a simple method is developed for the fabrication of LDPE/rGO nanocomposites using a solvent casting method. The UV‐visible spectra showed that addition of rGO can effectively cut off the short‐wavelength UV‐B light, which resists the occurrence of photoreaction. The stiffness of the LDPE/rGO nanocomposites was improved by 45% with an increase of modulus of elasticity as the rGO content increases. This is slightly opposite to the small decrease of the nanocomposite tensile strength. The addition of rGO to LDPE improved the thermal stability and degree of crystallization of LDPE/rGO nanocomposites when the rGO content increases from 0.025 to 1 wt%. The gas barrier property was also improved by 26% with 0.3 wt% of rGO. The dielectric property of the LDPE/rGO nanocomposites was also evaluated for industrial electronics application and the dielectric constant increases 50% compared with the neat LDPE when 0.1–1 wt% rGO was added. Results obtained clearly indicate the feasibility of using unmodified rGO to improve the properties of LDPE matrix for meeting the performance requirements for intended use in packaging industries. © 2018 Society of Chemical Industry

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Structure evolution and orientation mechanism of isotactic polypropylene during the two‐stage solid die drawing process

Yang

Zhao

et al. 2018

J of Applied Polymer Sci

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High oriented isotactic polypropylene prepared by self-designed two-stage die drawing apparatus was explored through kinds of methods, including differential scanning calorimetry, two-dimensional wide-angle X-ray diffraction, polarized light microscope, and tensile test. The results showed that there was a great difference between the orientation mechanism and structure evolution of two-stage solid die drawing process and single-stage solid die drawing process. All samples would undergo free drawing process after die drawing process. Die drawing and free drawing process were of equal importance to single-stage die drawing process while die drawing process showed an prominent contribution to the two-stage die drawing process. Drawing speed showed beneficial influence on die drawing process for both single-and two-stage die drawing process routes. Under the same processing condition, tensile strength and modulus of samples prepared by two-stage die drawing process were higher than those prepared by single-stage die drawing process and the maximum value could reach 241.93 MPa and 3.57 GPa, respectively. Moreover, two-stage die drawing samples showed better dimensional stability than single-stage die drawing samples especially under low draw rate. V C 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2018, 135, 46581.

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Effect of simple shear induced orientation process on the morphology and properties of polyolefin/graphite nanoplates composites

Cited by 16 publications

References 34 publications

Effects of orientation ordering of low‐density polyethylene—multi‐walled carbon nanotubes composites determined by severe plastic deformation

Effects of orientation ordering of low‐density polyethylene—multi‐walled carbon nanotubes composites determined by severe plastic deformation

Physicochemical properties of reduced graphite oxide conglomerated polyethylene nanocomposites

Structure evolution and orientation mechanism of isotactic polypropylene during the two‐stage solid die drawing process

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