Porous structure, permeability, and mechanical properties of polyolefin microporous films

Elyashevich, G. K.; Kuryndin, I. S.; Lavrentyev, V. K.; Bobrovsky, Alexey; Bukošek, V.

doi:10.1134/s1063783412090090

Cited by 38 publications

(33 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…At the large extensions, the discontinuities coalesce, thereby forming through channels, and the porous sample becomes permeable to liquids and gases ( Fig. 1c) [9][10][11] .…”

Section: Objects and Methods Of Investigationmentioning

confidence: 99%

Application of laser radiation for investigation of oriented polypropylene membranes

et al. 2016

View full text Add to dashboard Cite

The oriented microporous polypropylene film membranes have been prepared in the process based on the melt extrusion. Functional characteristics of the membranes (permeability, overall porosity, sizes of pores) were controlled by the parameters of the preparation process. The samples had a well-developed porous structure and contained a through flow channels. The structure of the films was investigated by laser light scattering in dependence on the orientation degree. Light scattering patterns have been obtained using a low-energy He-Ne laser with the power of 5 mW and the wavelength of 633 nm. The optical setup also included the beam-forming system, and the detection unit connected to a PC. To detect the light scattering pattern, a lens less CCD-camera was used. The scattering patterns have a developed speckle structure, and, therefore, to simplify further studies, intensity should be averaged over a sufficiently large number of patterns using a special computer program. These scattering patterns are characterized by a specific type of symmetry and differ from any patterns typical for oriented crystallizable polymers. It is found that similar patterns are observed for all porous samples regardless of their orientation degree. The size of central maximum of the scattering pattern is dependent on the polymer film orientation degree. The results correlate well with the dependence of the porous films overall porosity on orientation degree.

show abstract

“…At the large extensions, the discontinuities coalesce, thereby forming through channels, and the porous sample becomes permeable to liquids and gases ( Fig. 1c) [9][10][11] .…”

Section: Objects and Methods Of Investigationmentioning

confidence: 99%

Application of laser radiation for investigation of oriented polypropylene membranes

et al. 2016

View full text Add to dashboard Cite

show abstract

“…2,5,14 The films are characterized by a multilevel (multifractal) structure. 5 Such structure is formed by stacks of crystalline lamellae arranged normally to the orientation (extension) direction of samples, so that molecular chains in crystallites are oriented in the extension direction. Lamellae stacks are connected by thin "bridges" (stressed ties) and form the framework of the solid-phase percolation cluster.…”

Section: Methodsmentioning

confidence: 99%

“…Porous films with well developed networks of through flow channels may be used as microfiltration membranes, separators in galvanic cells, and elastic substrates in composite systems. [8][9][10][11][12][13] Up to now, there have been few published papers 5,14 concerning the analysis of the porousfilm preparation process, at which transition from individual pores to a connected network of through flow channels is observed. In 14 it was shown that the formation of through pores in the samples prepared in the process based on melt extrusion occurs via the percolation mechanism.…”

Section: Introductionmentioning

confidence: 99%

“…Flexible-chain polyolefins such as high density polyethylene 1,2 and polypropylene [3][4][5][6] are capable to form the oriented lamellar structures during crystallization of polymer melts under extension. The thermal treatment of these samples at temperatures close to the melting temperature of a polymer leads to an increase in the degree of crystallinity and a decrease in the number of tie chains in amorphous regions between lamellae, and, finally, almost all tie chains become stressed.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Ordering Effects and Percolation in the Structure Formation Process of the Oriented Polyolefin Porous Films

Elyashevich

Novikov

Kuryndin

et al. 2017

ACSi

View full text Add to dashboard Cite

Structure transitions and mechanism of the formation of superlattices lamellae in microporous polyolefin (polyethylene and polypropylene) films obtained in the process based on polymer melt extrusion followed by annealing, uniaxial extension and thermal fixation have been studied by statistical analysis of electron microscopy images of the film surface. The structure of the porous films prepared in the multistage process has been studied by SEM, gravimetry and permeability measurements. It has been shown that the pore formation at the stage of uniaxial extension is accompanied by the ordering of lamellae and their self-organization controlled by spin draw ratio and annealing temperature. It was established that an increase of these parameters lead to the transition of disorder-order type. The effect of preparation conditions on the ordering process of regular spatial lattices of lamellae has been discussed.

show abstract

“…Earlier we published some papers [17][18][19][20][21][22], that described production of hybrid polymer structures with thin polyethylene (PE) porous films prepared according to [23]. One of the papers [24] described a simple but extremely reliable method to create composite films based on porous polypropylene (PP) and CdSe/ZnS QDs.…”

Section: Physbiosymp17mentioning

confidence: 99%

Technology for Creation and Detailed Analysis of Polymer Composites with Uniform Distribution of Quantum Dots and Liquid Crystals

Mochalov¹,

Bobrovsky²,

Solovyeva³

et al. 2018

KEn

View full text Add to dashboard Cite

show abstract

Porous structure, permeability, and mechanical properties of polyolefin microporous films

Cited by 38 publications

References 12 publications

Application of laser radiation for investigation of oriented polypropylene membranes

Application of laser radiation for investigation of oriented polypropylene membranes

Ordering Effects and Percolation in the Structure Formation Process of the Oriented Polyolefin Porous Films

Technology for Creation and Detailed Analysis of Polymer Composites with Uniform Distribution of Quantum Dots and Liquid Crystals

Contact Info

Product

Resources

About