Physicochemical Characterization of Poly(vinyl chloride). II. Molecular Weight Distributions

Abstract

Molecular weight distributions in poly(viny1 chloride) resins have been determined from simple viscosity measurements. Ratio of 11% solution viscosity to intrinsic viscosity yielded a figure which has been correlated with molecular weight distributions obtained (1) from the ratio of weight-average to number-average molecular weights and (2) from gel permeation chromatography. Ratio of viscosities is thus a useful short-cut technique for obtaining approximate molecular weight distributions in poly(viny1 chloride) resins which have 0.77 < [ q ] < 1.15 and 1.6 < ROM < 2.8.

Flow properties of poly (vinyl chloride)

“…The concentration dependence of viscosity of eight commercial PVCs (Table 1 ) in tetrahydrofuran at 25°C has been determined by Baijd (1) and the results are shown in Fig. 1 .…”

“…For the concentration region covered, the plots follow an exponential behavior which can be expressed by Trulon 510,Geon 103EP,. (1)…”