マッハツェンダー光干渉法による粘弾性流体の流動性の測定

抄録

A method for measuring absolute values of normal stresses and stress optical coefficients can be developed by applying the scattered light interferometry for solid materials, the Mach-Zehnder interferometry, to viscoelastic fluids in flow and it can be shown that the difference between interferometric fringe orders for the polarized light in the flow direction and for that in the neutral direction must be equal to the birefringence fringe order. The results of measurements for a polyethylene melt, though not sufficiently accurate to allow evaluation of the normal stress and the stress optical coefficients, seemed compatible with the predictions of the proposed method.