intrinsic viscosity


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intrinsic viscosity

[in′trin·sik vi′skäs·əd·ē]
(physical chemistry)
The ratio of a solution's specific viscosity to the concentration of the solute, extrapolated to zero concentration. Also known as limiting viscosity number.
References in periodicals archive ?
The values of the intrinsic viscosity [eta], the interaction parameter k, and the aspect ratio p are reported in Table 3.
Effects of SDS Concentration on Intrinsic Viscosity. The intrinsic viscosity of polymers was first enhanced and then reduced by the increasing dose of SDS (Table 1).
The intrinsic viscosity shows variation with temperature due to micelle shape transition from spherical to cylindrical, while the hydrodynamic radius also varies with the temperature and E-block length.References
The intrinsic viscosity analysis can be performed using up to eight solution concentrations that can be measured without operator intervention.
The intrinsic viscosity is described as the limit of the ratio between the specific viscosity ([[eta].sub.sp]) and the polymer concentration (c), as the polymer concentration approaches zero as Eq.
where [t.sub.1] is the flow time for the chitosan solution, [t.sub.0] is the flow time for the solvent system, and [[eta].sub.i] is the intrinsic viscosity.
The intrinsic viscosity increased with increase in molecular weight as shown in Table-4.
The system measures the optimum flow rate and calculates intrinsic viscosity. Tests can be completed in as little as 20 min.
In a single GPC/SEC experiment, users are able to obtain absolute molecular weight, molecular size (to less than 1 nm) and intrinsic viscosity, as well as information on copolymer composition.
At spunbond throughputs of 0.40-0.80 gm/hole/min., extruder temperatures range from 210[degrees]C to 282[degrees]C and die melt temperatures from 250[degrees]C to 280[degrees]C, depending on the intrinsic viscosity of the grade selected.
Data on intrinsic viscosity, measured by capillary viscometry, have yielded insight into changes in molecular weight during the initial stages of hydrolysis.