Properties of oriented film tapes prepared via solid-state processing of a nascent ultrahigh-molecular-weight polyethylene reactor powder synthesized with a postmetallocene catalyst

Ozerin, А. N.; Ivanchev, S. S.; Чвалун, С. Н.; Aulov, V. A.; Ivancheva, N. I.; Бакеев, Н. Ф.

doi:10.1134/s0965545x12100033

Cited by 42 publications

(29 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fine‐grained UHMWPE reactor powder (MW 5 × 10 6 Da, bulk density 0.058 g/cm 3 ) was chosen as a base material for the polymer matrix of the investigated composites. This powder possesses a special nodular morphology , which can be seen in the electron microscopy images in Fig. ( 1 – 3 ).…”

Section: Methodsmentioning

confidence: 94%

A study of oriented conductive composites with segregated network structure obtained via solid‐state processing of UHMWPE reactor powder and carbon nanofillers

et al. 2017

View full text Add to dashboard Cite

FederationReinforced electrically conductive polymer composites based on ultra-high molecular weight polyethylene reactor powder and filled with various amounts of carbon black, graphite nanopowder, and multiwalled carbon nanotubes were studied. The composites were obtained via compaction of a mechanical mixture of the filler and the polymer reactor powders. This was followed by uniaxial deformation of the material under homogeneous shear conditions. The resulting composites possessed high tensile strength (up to 200 MPa) and electrical conductivity (up to 10 S/cm). Effects of the filler type and content on the electrical conductivity and mechanical properties of the conductive composites were investigated. Changes in the electrical conductivity of the oriented composite materials during reversible "elongation-compression" cycles along the orientation axis direction were observed. The structure of the reinforced electrically conductive polymer composites was characterized using X-ray diffraction and electron microscopy. POLYM. COMPOS., 00:000-000,

show abstract

Section: Methodsmentioning

confidence: 94%

A study of oriented conductive composites with segregated network structure obtained via solid‐state processing of UHMWPE reactor powder and carbon nanofillers

et al. 2017

View full text Add to dashboard Cite

show abstract

“…Figure 7 shows the dependence of the elastic modulus and tensile strength of oriented films obtained by solvent-free processing of the reactor powder synthesized in catalytic system I on the drawing ratio. The processing of reactor powders of UHMWPE obtained from catalytic systems I-III into high-modulus oriented films was carried out by preparing monolithic samples under pressure and shear deformation at an elevated temperature below the polymer melting point with subsequent uniaxial stretching by the method described by Ozerin et al [8]. Table 2 summarizes the set mechanical characteristics of UHMWPE films.…”

Section: Properties Of Reactor Powdersmentioning

confidence: 99%

Titanium(III, IV)-Containing Catalytic Systems for Production of Ultrahigh Molecular Weight Polyethylene Nascent Reactor Powders, Suitable for Solventless Processing—Impact of Oxidation States of Transition Metal

et al. 2017

View full text Add to dashboard Cite

Catalytic systems containing TiCl 4 or TiCl 3 , THF, organomagnesium (n-Bu 2 Mg) and organoaluminum compounds capable of producing ultrahigh molecular weight polyethylene (UHMWPE) were developed. The resulting polymers were characterized by a molecular weight in the range of (1.8-7.8) × 10 6 Da and desirable morphology, suitable for modern methods of polymer processing-the solvent-free solid-state processing of superhigh-strength (tensile strength up to 2.1 GPa) and high-modulus (elastic modulus up to 125 GPa) oriented films and film tapes. The impacts of a THF additive, the oxidation state of the titanium atom, and the composition and nature of the nontransition organometallic compounds on the formation of catalytic systems for UHMWPE production were evaluated. The results indicate the suitability of individual titanium chloride tetrahydrofuran complex application for the formation of THF-containing catalytic systems. This approach also results in a significant increase in the system catalytic activity and mechanical properties of UHMWPE. The catalysts based on Ti(III) were inferior to systems containing Ti(IV) in productivity but were markedly superior in the mechanical properties of UHMWPE.

show abstract

“…

In this work, for the first time, we described the possibility of producing strengthened oriented highly filled electrically conductive polymer nanocomposites under uniform shear conditions so that the rupture strength of these composites is an order of magnitude higher than that of non oriented composites of the same composition.

We studied electrically conductive specimens of polymer composites of various compositions that were produced by filling a nascent reactor powder of ultra high molecular weight polyethylene (UHMWPE) of a nodular morphological structure (with a molecular weight of 5 × 10 6 and a bulk density of the reactor pow der of 0.058 g/cm 3 ) [1] with a commercial electrically conductive graphene nanopowder (GN) of grade AO 4 containing 60 nm thick flakes (Graphene Laborato ries) [3].

…”

mentioning

confidence: 99%

“…Orientation stretching is known to be an efficient method for strengthening polymer materials [1]. However, such stretching of polymer composites filled with various dispersed fillers is often accompanied by their brittle fracture even early in the deformation [2].…”

mentioning

confidence: 99%

“…We studied electrically conductive specimens of polymer composites of various compositions that were produced by filling a nascent reactor powder of ultra high molecular weight polyethylene (UHMWPE) of a nodular morphological structure (with a molecular weight of 5 × 10 6 and a bulk density of the reactor pow der of 0.058 g/cm 3 ) [1] with a commercial electrically conductive graphene nanopowder (GN) of grade AO 4 containing 60 nm thick flakes (Graphene Laborato ries) [3]. Our X ray powder diffraction studies showed that the filler is fine polycrystalline graphite with a coherent scattering length (stack height) in the crys tallographic direction [002] of ≈30 nm.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Strengthened electrically conductive composites based on ultra-high-molecular-weight polyethylene filled with fine graphite

et al. 2014

Self Cite

View full text Add to dashboard Cite

Orientation stretching is known to be an efficient method for strengthening polymer materials [1]. However, such stretching of polymer composites filled with various dispersed fillers is often accompanied by their brittle fracture even early in the deformation [2].In this work, for the first time, we described the possibility of producing strengthened oriented highly filled electrically conductive polymer nanocomposites under uniform shear conditions so that the rupture strength of these composites is an order of magnitude higher than that of non oriented composites of the same composition.We studied electrically conductive specimens of polymer composites of various compositions that were produced by filling a nascent reactor powder of ultra high molecular weight polyethylene (UHMWPE) of a nodular morphological structure (with a molecular weight of 5 × 10 6 and a bulk density of the reactor pow der of 0.058 g/cm 3 ) [1] with a commercial electrically conductive graphene nanopowder (GN) of grade AO 4 containing 60 nm thick flakes (Graphene Laborato ries) [3]. Our X ray powder diffraction studies showed that the filler is fine polycrystalline graphite with a coherent scattering length (stack height) in the crys tallographic direction [002] of ≈30 nm.The initial mixing of two fine powder components of the UHMWPE-GN system was performed mechani cally. The initial non oriented specimens of nano graphene filled polyethylene composites (PENG) were shaped as 0.5 mm thick plates obtained by compacting the material under a pressure of 200 atm at room tem perature.Uniaxial orientation of the specimens was carried out at room temperature in a special setup [2]. It pro duced a combination of compression and uniform shear of a specimen placed between plates made of a plastic Pb-Sn alloy. The specimen was extruded through a conical die of a certain diameter, which determined the strain of the material. The latter was characterized by the stretching ratio l/l 0 , where l and l 0 are the lengths of the oriented and initial non oriented composite specimens, respectively.The stress-strain curves of the produced PENG specimens were recorded at room temperature in Tin ius Olsen H1KS and Shimadzu AGS 10 universal test ing machines in the uniaxial stretching mode at a deformation rate of 0.2 min -1 . Heat treatment of the oriented specimens was performed in the heat cham ber of the Shimadzu AGS 10 testing machine.The conductivity of the composite plates and ori ented specimens was measured with an Agilent 34401A multimeter.The wide angle X ray diffraction patterns were recorded with a Bruker NANOSTAR system (CuK α radiation) with a 2D position sensitive detector. Elec tron microscopic studies of the specimens at various magnifications were made with a JEOL JSM 35 scan ning electron microscope. No metal coating was made, which allowed us to contrast conductive and nonconductive regions of the composite structure. The specimens were prepared by low temperature cleavage at liquid nitrogen temperature.The measured dependence of the electri...

show abstract

Properties of oriented film tapes prepared via solid-state processing of a nascent ultrahigh-molecular-weight polyethylene reactor powder synthesized with a postmetallocene catalyst

Cited by 42 publications

References 14 publications

A study of oriented conductive composites with segregated network structure obtained via solid‐state processing of UHMWPE reactor powder and carbon nanofillers

A study of oriented conductive composites with segregated network structure obtained via solid‐state processing of UHMWPE reactor powder and carbon nanofillers

Titanium(III, IV)-Containing Catalytic Systems for Production of Ultrahigh Molecular Weight Polyethylene Nascent Reactor Powders, Suitable for Solventless Processing—Impact of Oxidation States of Transition Metal

Strengthened electrically conductive composites based on ultra-high-molecular-weight polyethylene filled with fine graphite

Contact Info

Product

Resources

About