Rheology, Viscosity & Cure Monitoring

Flow behavior, viscosity, cure evolution, shear response, oscillatory response, and processability testing for liquids, pastes, dispersions, resins, adhesives, and polymer systems. Elect Nano uses this capability as part of application-driven materials programs where test setup, sample format, and data interpretation need to match the end-use requirement.

Capabilities

Rotational and oscillatory rheology
Controlled stress, controlled strain, and controlled rate testing
Flow curves, viscosity versus shear rate, thixotropy, yield stress, gelation, and viscoelastic property measurements
UV-curing rheology and cure monitoring
Coupled rheology-dielectric characterization where configured
Small-volume and temperature-controlled viscosity testing

Equipment and Methods

TA Instruments Discovery HR-20 Hybrid Rheometer

Features

Rotational and oscillatory rheology
Controlled stress, controlled strain, and controlled rate testing
Flow curves, viscosity versus shear rate, thixotropy, yield stress, gelation, and viscoelastic property measurements
Suitable for liquids, pastes, dispersions, resins, adhesives, coatings, filled systems, and soft solids
Supports cure monitoring and coupled rheological/dielectric characterization when configured with compatible accessories

Accessories and configurations

Advanced Peltier plate
Insulated solvent trap
Environmental Test Chamber with elevated-temperature capability
UV curing rheology accessory with Omnicure S2000 light source, 320-500 nm range
Dielectric analysis accessory
Keysight E4980A LCR meter, 20 Hz to 2 MHz
Compatible rheometer plates, geometries, and sample fixtures

Applicable standards and internal methods

ASTM D2196: Rheological properties of non-Newtonian materials by rotational viscometer
ASTM D4440: Plastics dynamic mechanical properties melt rheology
ASTM D4473: Plastics dynamic mechanical properties cure behavior
ASTM D7175: Rheological properties using a dynamic shear rheometerApplicable only where material and geometry are appropriate
ASTM D150: AC loss characteristics and permittivity of solid electrical insulating materialsWhere applicable to compatible dielectric configurations
ASTM D257: DC resistance or conductance of insulating materialsWhere applicable to compatible dielectric or electrical configurations
ISO 6721 series: Dynamic mechanical propertiesWhere applicable to rheological/mechanical modes
Internal Method: Viscosity, yield stress, thixotropy, gelation, cure-monitoring, UV-curing rheology, and coupled rheology-dielectric workflows

Brookfield DV2T Viscometer

Features

Rotational viscosity testing
Useful for dispersions, process fluids, coatings, resins, low-to-medium viscosity liquids, and formulation QC
Supports small-volume viscosity testing when configured with compatible accessories
Supports temperature-controlled viscosity testing when paired with compatible bath configuration

Accessories and configurations

Small sample adapter with spindle set
Temperature-controlled water bath
Rheocalc T software

Applicable standards and internal methods

ASTM D2196: Rheological properties of non-Newtonian materials by rotational viscometer
ASTM D1084: Viscosity of adhesives
ASTM D2556: Apparent viscosity of adhesives having shear-rate-dependent flow properties
ISO 2555: Determination of apparent viscosity by Brookfield method for liquid resins, emulsions, or dispersions
Internal Method: Viscosity QC and formulation screening workflows

Rheology, Viscosity & Cure Monitoring

Capabilities

Equipment and Methods

TA Instruments Discovery HR-20 Hybrid Rheometer

Brookfield DV2T Viscometer

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