The viscosity measurement of comb copolymer was determined by Ubbelohde viscosimetry
at 25AdegC and 1,4-dioxane used as solvent.
The viscosity of the material, captured by rotational viscosimetry
, decreases with increasing temperature, Fig.
Different chemical and physical analytical techniques can be used to monitor the transesterification of triglycerides, notably near-infrared spectroscopy (NIR) [6, 7], Raman spectroscopy , gas chromatography , high performance liquid chromatography (HPLC) , and viscosimetry
The synthesized intermediates and products were inspected by IR-spectroscopy, hydroxyl number, and rotational viscosimetry
. The substitution of polar hydroxyl groups with less polar acrylate groups led to a decreased viscosity, that can be explained by the reduction of intermolecular forces.
Cametti, "DNA condensation induced by cationic surfactant: a viscosimetry
and dynamic light scattering study," The Journal of Physical Chemistry B, vol.
applied to the Bingham substance ice slurry.
Chitosan (Cs) flakes from prawn shells (Pandalus borealis), with a degree of deacetylation (DD) of 88,4%, (nitrogen 7,30% determined by ICP, ) and molecular weight of 1,14 x [10.sub.5] (estimated by viscosimetry
, ), were purchased from Marinard Biotech (Quebec, Canada).
The resins prepared previously were characterized by IR spectroscopy, NMR[sup.1]H, NMR [sup.13]C and viscosimetry
. It will be noted that spectroscopic measurements of IR were done on a spectrometer models Perkin apparatus, NMR on a "Brucker 300MHz" and viscosimetry
on a capillary viscometer standard Ubelohde with one tenth poise flow at set temperature of 25 [+ or -] 0.1 [degrees]C.
The rheological properties of the composite gels were studied by using the rotation viscosimetry
(Brookfield DV-II+PRO (USA)).
For the calibration of the apparent viscosity in the reactor, a standard viscosimetry
test was run in a TA Instruments AR1000 N rheometer with a cone and plate geometry.
Its viscosity average molar mass was 3.83 X [10.sup.4] g/mol; which was determined by viscosimetry
in 0.2 M NaCl at 25[degrees]C.