Influence of impregnation modes on the porous structure of composite materials with fibrous filler made of polypropylene fibers
https://doi.org/10.35164/0554-2901-2024-06-19-22
Abstract
The degree of impregnation of the fabric and the density of the composite materials were used to evaluate the porous structure of the composite materials obtained by impregnating a nonwoven needle-punched fabric made of polypropylene fibers with a linear density of 0.66 with an aqueous dispersion of polyurethane. The dependence of the degree of impregnation on the gap between the squeezing rollers and the concentration of polyurethane in the aqueous dispersion was investigated. When the concentration of polyurethane in the aqueous dispersion is below 15 wt.% and the gap between the squeezing rollers is less than 1 mm, the degree of impregnation does not exceed 0.3. To assess the change in the volume of fibrous filler during the heat treatment of the impregnated fabric, the relationship between the degree of impregnation and the density of composite materials was used. It was found that at the density of the fabric 117 kg/m3 the heat treatment of the impregnated fabric occurs without changing the volume of the fiber filler. When using a fabric with a density of 80 kg/m3 for reinforcing composite materials, the volume of fibrous filler.
About the Authors
I. D. Asmetkov
Russian State University named after A.N. Kosygin
Russian Federation
Russian Federation
Moscow
N. I. Godin
Russian State University named after A.N. Kosygin
Russian Federation
Russian Federation
Moscow
A. V. Dedov
Moscow Polytechnic University
Russian Federation
Russian Federation
Moscow
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Review
For citations:
Asmetkov I.D., Godin N.I., Dedov A.V. Influence of impregnation modes on the porous structure of composite materials with fibrous filler made of polypropylene fibers. Plasticheskie massy. 2024;(6):19-22. (In Russ.) https://doi.org/10.35164/0554-2901-2024-06-19-22
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