A Method of Determining the Viscosity of Highly Viscous Materials
JSGT 1951 V35 T320-T331
The viscosity of highly viscous resins was examined using circular rods suspended in a manner similar to that of an horizontal beam fixed at one end. The rods were mounted in drill chucks capable of rotation about an horizontal axis. By continuous rotation, temperature equilibrium was reached without deformation, so that a series of experiments could be carried out successively on the same body. The rate of deformation for various rods of different sizes was determined, whilst the viscosity was measured by means of a Pochettino viscometer. Good agreement between the relation found by experimental research and the theoretically derived formula was proposed. This method, applied at higher temperatures, may prove suitable for application to glasses for the determination of the viscosities of the order of 106 poises and above.
Finn Gronlund
