Thermal conductivity study of the boundary layer in filled polyvinyl chloride (PVC) and polyvinyl butyral (PVB)

Kolupayev, B.S.; Bordyuk, N. A.

doi:10.1016/0032-3950(81)90401-9

Cited by 4 publications

(2 citation statements)

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“…In this case, the system of filler particles is ordered, and the movement of its nodes immersed in the interfacial layer depends on the state of the neighbors. Such a structurally ordered system is considered as a periodic macro lattice [20].…”

Section: Resultsmentioning

confidence: 99%

Percolation characteristics of filled polyurethane auxetics

Shevchuk¹,

Bordyuk²,

Mashchenko³

et al. 2022

Phys. Chem. Solid St.

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According to the experimental values of the propagation velocities of longitudinal and transverse ultrasonic waves, the Poisson's ratio of polyurethane systems filled with metal particles was determined. For such systems, the Poisson's ratio is negative. Its value for metal-filled polymer auxetics with polyurethane matrix allowed to determine fractal dimensions and critical percolation indices. This approach made it possible to clarify the features of structure formation in polymer auxetics. It is shown that the fractal-percolation characteristics of these systems are determined by the type of metal filler and the size of its particles.

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Section: Resultsmentioning

confidence: 99%

Percolation characteristics of filled polyurethane auxetics

Shevchuk¹,

Bordyuk²,

Mashchenko³

et al. 2022

Phys. Chem. Solid St.

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“…TPU-system model, where metal filler content is critical, is presented as stated in paper [32]. As reported by the model metal filled TPU-system is a cubic macrolattice (in 3D modeling) with bulky sphere-shaped feller's particles in its nodes.…”

Section: Results and Their Evaluationmentioning

confidence: 99%

Viscoelastic Properties of Filled Polyurethane Auxetics

Shevchuk

Бордюк

Krivtsov

et al. 2021

Phys. Chem. Solid St.

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The paper presents experimental values of lateral and extension transmission ultrasonic waves speed and their absorbance coefficient obtained with the help of discrete immersed method in metal filled polymer auxetic samples with polyurethane matrix. Poisson’s ratio, real and imaginary parts of complex dynamic elastic modulus (Young’s modulus, shear modulus, bulk modulus) and mechanical losses tangent of angle for extension, lateral and bulk deformation have been calculated regarding paper’s results. Viscoelastic properties of polyurethane auxetic have been examined regarding different theoretical approaches. To support negative values of Poisson’s ratio, a filled polymer model with critical filler amount and auxetic deformation models have been used. Models structural characteristics for filled polyurethane auxetics have been defined. Systems modeling with solid bulky inclusions, that are able to absorb and to disseminate ultrasonic waves, enables to consider suchlike systems as complex density materials. It is shown that in certain ratio of wave parameters and environment structural and mechanical properties, resonance effects take place, regarding filler’s particles vibration as inclusions in general.

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