Estimation of the optical and geometric parameters of polymer fibres with light-scattering diagrams

Sidorov, O. V.; Shablygin, M. V.; Щетинин, А. М.

doi:10.1007/bf02408127

Cited by 1 publication

(4 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here C designates the center of the fibre, and the arbitrary fractional distances from the center along the radius (R) are on the horizontal axis. The picture of radial distribution of BF shows that a marked change in this index begins not directly from the surface of the filament but at a distance equal to approximately 35-40% R. Similar pictures were also obtained with the data in [20]. Our measurements of the optical parameters of SVM and PPTA fibres confirm the existence of such RDBF.…”

Section: Parameters Of the Fibres After Treatment In The Pulsed-periodicsupporting

confidence: 81%

“…The presence of RDRI and RDBF in aramid fibres has been confirmed repeatedly [20,26]. The typical picture of tile BF distribution over the cross section of Kevlar-29 fibre is shown in Fig.…”

Section: Parameters Of the Fibres After Treatment In The Pulsed-periodicmentioning

confidence: 51%

“…The optical and geometric parameters of the fibres were determined with the method described in [20].…”

mentioning

confidence: 99%

“…The interference picture is processed with the Abet integral [17]. If the light scattering picture obtained with no immersion medium is considered as the superposition of the interference and diffraction pictures, then it is not only possible to find the RDRI and RDBF but also to simultaneously determine the fibre diameter [18][19][20].…”

mentioning

confidence: 99%

See 3 more Smart Citations

Effect of high pulsed hydrostatic pressure on the optical properties and internal residual stresses of highly oriented fibres

Sidorov¹,

Shablygin²,

Belonenko³

et al. 1999

Fibre Chem

Self Cite

View full text Add to dashboard Cite

The high hydrostatic pressure of insoluble liquids affects both the mechanical properties and the geometric parameters of different materials, as well as their microstructure. Fine grinding, shaping, and molding, plastic alteration of the shape, strengthening, impregnation of natural and synthetic materials, including metals, ceramics, plastics, etc., are conducted in industrial conditions. It is important for the technician to have methods of acting on concrete materials, and the changes in the structure of the substances tested are of interest to researchers [1][2][3][4][5][6].Preliminary grinding of solids accelerates chemical reactions, calcination, dissolution, i.e., processes that take place more rapidly the greater the surface area of the solids involved in them. Solid and brittle powdered materials with a compressive strength higher than the tensile strength are ground by placing in an elastic membrane and executing several hydrostatic pressure cycles. Its value is significantly higher than the tensile strength of the powder particles. After each compression, the pressure drops sharply. There is a grinding boundary for any material. With a further increase in the pressure, a process opposite to grinding begins: pressing, or aggregation. When the boundary pressure is exceeded, relatively compact but comparatively low-strength assemblies of particles are formed--aggregates, and the spaces between them are filled with smaller particles. The ratio of the compressive strength to the tensile strength cau be used as the criterion of the applicability of the described method of fine grinding to different materials. The higher this ratio is, the more efficiently the material is ground.Impregnation of porous materials and articles with a liquid is a constituent part of many technologies and is a "bottleneck" in the technological chain. Under the effect of high hydrostatic pressure, the volume of the impregnated substance decreases significantly, i.e., the porous skeleton is compacted. This situation can be used for simultaneous impregnation, compacting, and shaping of porous stock.The fatigue resistance of materials under a sign-variable load can be increased by single or repeated stretching beyond the creep strength, since the plastic deformation accompanying stretching creates residual compressive stresses. After removal of the static load, the residual stresses are summed with the variable stresses of the working load, the absolute values of the latter decrease, and the fatigue strength thus increases. Different methods of strengthening have been developed, but uniaxial stretching under high hydrostatic pressure, discovered by the American physicist R V. Bridgman [3], was the most effective strengthening method while preserving sufficient plasticity (even for solid and difficult to deform alloys). This discovery was the basis of all modem methods of cold processing of metals with pressure, and the plasticity of the metal is determined by the value of the hydrostatic pressure in the deformation zone.Bridgman also...

show abstract

Section: Parameters Of the Fibres After Treatment In The Pulsed-periodicsupporting

confidence: 81%

Section: Parameters Of the Fibres After Treatment In The Pulsed-periodicmentioning

confidence: 51%

“…The optical and geometric parameters of the fibres were determined with the method described in [20].…”

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

Effect of high pulsed hydrostatic pressure on the optical properties and internal residual stresses of highly oriented fibres

Sidorov¹,

Shablygin²,

Belonenko³

et al. 1999

Fibre Chem

Self Cite

View full text Add to dashboard Cite

show abstract

Estimation of the optical and geometric parameters of polymer fibres with light-scattering diagrams

Cited by 1 publication

References 2 publications

Effect of high pulsed hydrostatic pressure on the optical properties and internal residual stresses of highly oriented fibres

Effect of high pulsed hydrostatic pressure on the optical properties and internal residual stresses of highly oriented fibres

Contact Info

Product

Resources

About