Measurements of the complex shear modulus of polymers under hydrostatic pressure usina the quartz resonator method

Theobald, S.; Schwarzenberger, P. M.; Pechhold, W.

doi:10.1080/08957959408200274

Cited by 8 publications

(2 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Koran and Dealy (1999) have developed a rheometer capable of measuring the shear-rate dependent viscosity of polymers under shear flow to pressures of up to 70 MPa. The dynamic viscosity (no flow) under pressure can be measured using a quartz-resonator (Theobald et al 1994(Theobald et al , 2001; there is no control of the strain amplitude. Commercial rheometers are available which impose moderate pressures (<20 MPa) pneumatically.…”

Section: Viscosity Measurementsmentioning

confidence: 99%

Supercooled dynamics of glass-forming liquids and polymers under hydrostatic pressure

et al. 2005

View full text Add to dashboard Cite

An intriguing problem in condensed matter physics is understanding the glass transition, in particular the dynamics in the equilibrium liquid close to vitrification. Recent advances have been made by using hydrostatic pressure as an experimental variable. These results are reviewed, with an emphasis in the insight provided into the mechanisms underlying the relaxation properties of glass-forming liquids and polymers.

show abstract

Section: Viscosity Measurementsmentioning

confidence: 99%

Supercooled dynamics of glass-forming liquids and polymers under hydrostatic pressure

et al. 2005

View full text Add to dashboard Cite

show abstract

“…Similar to torsional resonators, they are sensitive towards low-viscous materials (|η * | min ∼ 10 −4 Pa•s) but require much less sample (Table 1 (C.1)). More advanced configurations were developed as well, such as a high temperatureand pressure-resistant setup (< 1 GPa, Table 1 (C.2)) (Theobald et al 1994), or more recently a resonator with interdigitated electrodes for simultaneous measurements of mass, viscosity and conductivity (Muramatsu et al 2016).…”

Section: Ultrasound Rheometersmentioning

confidence: 99%

Bulk rheometry at high frequencies: a review of experimental approaches

et al. 2019

View full text Add to dashboard Cite

High-frequency rheology is a form of mechanical spectroscopy which provides access to fast dynamics in soft materials and hence can give valuable information about the local scale microstructure. It is particularly useful for systems where timetemperature superposition cannot be used, when there is a need to extend the frequency range beyond what is possible with conventional rotational devices. This review gives an overview of different approaches to high-frequency bulk rheometry, i.e. mechanical rheometers that can operate at acoustic (20 Hz-20 kHz) or ultrasound (> 20 kHz) frequencies. As with all rheometers, precise control and know-how of the kinematic conditions are of prime importance. The inherent effects of shear wave propagation that occur in oscillatory measurements will hence be addressed first, identifying the gap and surface loading limits. Different high-frequency techniques are then classified based on their mode of operation. They are reviewed critically, contrasting ease of operation with the dynamic frequency range obtained. A comparative overview of the different types of techniques in terms of their operating window aims to provide a practical guide for selecting the right approach for a given problem. The review ends with a more forward looking discussion of selected material classes for which the use of high-frequency rheometry has proven particularly valuable or holds promise for bringing physical insights.

show abstract

The pressure and temperature dependence of the relaxation processes in poly(methylmethacrylate)

Theobald

Pechhold

Stoll

2001

Polymer

View full text Add to dashboard Cite

Measurements of the complex shear modulus of polymers under hydrostatic pressure usina the quartz resonator method

Cited by 8 publications

References 2 publications

Supercooled dynamics of glass-forming liquids and polymers under hydrostatic pressure

Supercooled dynamics of glass-forming liquids and polymers under hydrostatic pressure

Bulk rheometry at high frequencies: a review of experimental approaches

The pressure and temperature dependence of the relaxation processes in poly(methylmethacrylate)

Contact Info

Product

Resources

About