• Instrumentation
• Accessories and measurement systems
        • New rheometry technique
        • Software
        • Conferences, Trade Shows, and Events

REOLOGICA Instruments AB has employed Mr. Dharmesh Gala as Export Manager-Asia Pacific Operations
of Reologica Instruments AB, based in Mumbai, India. Mr. Dharmesh Gala has many years experience in
Rheology and Thermal Analysis.
Mr. Dharmesh Gala will team the Asia Pacific Operation to provide Superior Research Grade Rheometers,
Rheological Consulting, Applications and Methods Development, Contract Testing, Training, and
Support Services to the rheological community in Asia.


REOLOGICA Instruments AB has joined forces with several major partners including 
Triton Technology Limited, Shimadzu ( Thermal Science Products ) and Scinco Europe 
to form a new organization known as Trilogica.

The new operation can offer direct sales of a wide range of thermal analysers, including 
the award winning Triton DMA and high quality Rheology instrumentation via Trilogica. 
Additional direct sales offices are now present around Europe and products are also 
available via our partners world wide. An extremely high level of support for customers is 
now available via an extensive well established infrastructure that can provide analytical 
support and advice, contract analysis and servicing of many thermal and rheological products. 
Upgrading of older thermal analysers is also possible.

ATS RheoSystems/REOLOGICA Instruments posts a 30% increase in sales in North America.

ATS RheoSystems/REOLOGICA Instruments, (USA) manufacturer and supplier of 
research level rheometers, provider of rheological consulting, method development, 
contract testing, and technical service, has announced it has achieved a 30% 
increase in sales revenues in 2001.

As a result of the introduction of several new products and instrument accessories, 
as well as continued growth in new markets with our existing research level rheometers 
and patented technologies, the company expects double digit returns for 2002 and beyond.

Back to Top

Instrumentation

Metallurgical Rheometer

We have designed and built a rheometer to measure the rheological parameters of liquid metals, for instance aluminium or die-casting alloys, up to 1000°C. This is now offered for general use with details to be agreed for your particular research requirement. This instrument has been provided with stainless steel bob and cup,  which are pre-oxidised to prevent adhesion of the liquid metal. Other material can also be used, for instance graphite.

STRESSTECH – THE STRAIN, STRESS AND SHEAR RATE CONTROLLED RHEOMETER
The World's Finest Rheometer is now improved!

STRESSTECH represents the new generation in controlled strain, stress and shear rate controlled rheometers. The StressTech rheometer has now an improved operation  for strain, stress and shear rate controlled measurements.  The system has an excellent transient  control, and step changes in strain can be performed in times as short as 10 mille seconds.

RheoPolym@
The Dedicated Rheometer For Plastics and Polymer

Features Customized quality control software [RheoQC] and research grade rheometry software [RheoExplorer] are provided. State-of-art air bearing provides high performance. Convection Gas Flow Heating chamber provides an accurate temperature control. Thermosets as well as thermoplastics can be measured by a Built-In Disposable Test Geometry System. Solids and composites can be measured by Torsion Fixture.

DynAlyser 2000

DynAlyser 2000 is a modular rheometer designed to cope with the changing needs of Materials Research and Process Development laboratories. DynAlyser 2000 is an integration of the expressed needs of our customers and product improvements derived from beneficial interaction between our customers and our technical service and applications groups.

Back to Top

Accessories and measurement systems

 Small Angle Light Scattering System




 The SALS system setup is used to study
 flow-induced structural changes and rheological
 data under shear and oscillation.
 Data, video sequences and images can be
 visualized on-line or stored in various formats for
 later evaluation and analysis.







Optical Microcopy Cell (OMC)
          



The optical microscope and the digital video camera allow you to observe the
structural variations under shear and oscillation.
Data, video sequences and images can be visualized
on-line or stored in various formats for later evaluation and analysis.


Water Absorption Cell
This cell allows the measurement of the 
swelling rate and of theological properties 
of water absorption polymers.

Sealed Cell
The Sealed Cell (patented) allows full dynamic oscillatory and
 viscometric measurements on volatile samples in a controlled
 environment, which is important many Food Applications.
 The cell is pressurized by a non contacting air bearing,
 with cell pressures to 7 bar. Temperature range for the Sealed Cell
 is -10 to 350C, the upper limit depends on the vapor pressure of the
 sample of interest. The Sealed Cell can also be equipped with parallel 
 plate measuring geometries for more viscous samples.




High Pressure Cell for StressTech and ViscoTech
The High Pressure Cell for StressTech rheometer and
ViscoTech viscometer is used for studying rheological
properties for samples under pressurized and/or
increased temperature conditions. The Cell offers full 
viscometry and limited oscillatory capabilities.

Applications
The oil industry is studying processes under high pressures,
like drilling mud performance, polymer solution addition and
gel formation. Further interest is the crude oil transport at
low temperatures and wax precipitation under different solids 
content, temperature and pressure. The Cell can also be as a
miniature polymerization reactor.

pecification Pressure interval: 0 to 1200 bar


Back to Top

New rheometry technique

Traditionally, when performing viscoelastic measurements,  proper data  analysis would require the rheometer to collect data over at least one complete period of oscillation. Therefore, the fastest theoretical data rate in samples/s (minimum time for each data point) would be equal to the frequency in Hz. For many DNS materials, especially radiation curable DNSs where the events of interest occur with 10 s of illumination, this data collection rate is too slow to capture the TTIT cure profile. For this reason, REOLOGICA Instruments has developed a unique data collection and analysis package called "Fast Oscillation Program".

The Fast Oscillation program is used to measure rapid, transient changes in a material. 
Based on the oscillation program, it works under the same principle where a sinusoid ally
varying forcing function is applied to the sample and the equally varying sample response
is measured. The measured values are evaluated by one of several sampling methods
selected by the user.  The number of measurement points to be measured and presented
can be set by the user, allowing data collection rates greater than 50 points/s.

The program also includes the ability to control the shutter of a remote light source. 
The Relay Setting allows the user to set the intervals during which the light source shutter
is turned on and off.


User selectable and quantitative, controlled axial normal force control

The cure of DNS materials typically results in shrinkage of as much as 10-15%.  
If the measurements are made with the gap at a constant setting, the shrinkage
of the materials will result in large internal stresses during the cure after gelatin. 
REOLOGICA Instruments AB has developed the software to handle this situation
by allowing the operator to change from a controlled gap setting mode to auto
tension mode (in which the axial normal force is controlled) at a user selectable
point or event. For measurements in the liquid state, the gap setting needs to be
set at a constant value, but by the time the gel point is reached the shear modulus
has increased sufficiently for the sample to maintain its shape.
Although shrinkage occurs throughout the chemical reaction, internal stresses will
develop only after gelation occurs. As soon as the gel point is reached (i.e., tan delta =1),
the instrument changes to autotension mode and maintains the normal force at zero
during the remainder of the cure cycle. 
The shrinkage can be monitored quantitatively using the gap measurements.

An example of an experiment run under these conditions is shown in Figure 1.  
A mixture consisting of 2-hydroxy ethyl methacrylate, a small amount of ethylene
glycol dimethacrylate cross linker and a photoinitiater in an inert solvent is cured
photo chemically between the 25 mm diameter plates of the rheometer equipped
with the UV cell.  Initially the gap is set at 0.5 mm. The viscosity (eta*) and the module
(G’ and G”) rise rapidly after the shutter is opened, while tan delta (=G”/G’) drops from
infinity (G’=0 in the initial liquid state).  When tan delta drops below 1, the autotension
mode is employed, and the reduction in the gap can be monitored during the remainder of the cure.

Without this adjustment to reduce the internal stresses, the measurement of the rheological
properties in the solid state may be compromised by artifacts due to the delaminating of the
sample from the plate, or the formation of voids in the sample.

Back to Top

Software

RheoExplorer

The new software RheoExplorer has a new design
and is much easy to use with the same professional
functions like our other software.

Back to Top

Conferences, Trade Shows, and Events

Upcoming Events - Tradeshows

REOLOGICA Instruments, Inc. attends Rheology Conferences, Tradeshows and
Events throughout the year.
Call or e-mail to request our schedule of upcoming events and presentations.


Analytica-India in Bangalore


JAIMA (Analytical Instrument Show) in Japan 2008
 





Back to Top

Technical Specifications Are Available By E-Mail Request

Send mail to info@reologica.com
Scheelevägen 30, S - 223 63 Lund, Sweden,
Phone +46 46 12 77 60, Fax +46 46 12 50 57