IMPREGNATION OF COMPOSITE MATERIALS BASED ON LONG CARBON FIBERS WITH A THERMOPLASTIC BINDER WHEN PRODUCING PREPREG

The fi ltration of liquid in carbon fi bers during their impregnation is considered. A quantitative relationship has been proposed between the mechanical compressive properties of long fl at carbon threads and their permeability coeffi cient in the direction perpendicular to the surface of the thread. A model based on a nonstationary solution of a one-dimensional fi ltration problem has been developed for calculating the process of impregnation of fi bers with a thermoplastic binder. As a result of a comparative analysis of experimental and calculated data, the dynamic viscosity of the melt and an analogue of its surface tension forces were assessed.
The fi ltration of liquid in carbon fi bers during their impregnation is considered. A quantitative relationship has been proposed between the mechanical compressive properties of long fl at carbon threads and their permeability coeffi cient in the direction perpendicular to the surface of the thread. A model based on a nonstationary solution of a one-dimensional fi ltration problem has been developed for calculating the process of impregnation of fi bers with a thermoplastic binder. As a result of a comparative analysis of experimental and calculated data, the dynamic viscosity of the melt and an analogue of its surface tension forces were assessed.
Author:  E. V. Slavnov, V. M. Timofeev, A. I. Sudakov
Keywords:  fi ltration, carbon fi bers, compression, impregnation, thermoplastic bond
Page:  43