Topic
Plastometer
About: Plastometer is a research topic. Over the lifetime, 186 publications have been published within this topic receiving 1957 citations.
Papers published on a yearly basis
1 / 2
Papers
TL;DR: In this paper, the authors re-exemined the problem using a finite element program and concluded that a small plug of unyielded fluid exists adjacent to the centre of the plates.
Abstract: In studies of the flow of a Bingham fluid in a parallel-plate plastometer there has been disagreement about whether or not a yield surface exists, and if it does exist what shape the yield surface has. The present authors have re-exemined the problem using a finite element program and have concluded that a small plug of unyielded fluid exists adjacent to the centre of the plates. This result has been verified by replacing the unyielded plug with a solid body.
291 citations
TL;DR: In this paper, a method for the measurement of the viscosity of high polymers at low rates of shear in the range 104 to 109 poises using a parallel plate plastometer was established.
Abstract: A method has been established for the measurement of the viscosity of high polymers at low rates of shear in the range 104 to 109 poises using a parallel plate plastometer. This is based on a mathematical criterion for separating the viscous portion of the deformation from the ``elastic'' and ``delayed elastic'' components. Experimentally, the plate separation is measured at a given temperature as a function of time. The theory furnishes a relation, which is also the criterion for predominantly viscous deformation, between viscosity, plate separation, applied load, and time. This relation, a modified form of Stefan's equation, is used for calculating the viscosity from the experimentally observed quantities. The method has been applied to polyethylene and vinyl chloride‐acetate resin compounds. The viscosity‐temperature behavior of these materials is shown to be simple over the temperature range studied; that is, log viscosity varies linearly with the reciprocal of the absolute temperature. Data are prese...
242 citations
TL;DR: In this article, the authors considered the development of a predictive macromolecular network decomposition model for coal conversion, which is based on a variety of modern analytical techniques for coal characterization.
133 citations
TL;DR: In this article, a numerical method is used to solve the plastometer flow problem and resolve some questions regarding the theoretical analysis, and the accuracy of the numerical method in obtaining solution to non-trivial problems involving fluids with a yield stress.
Abstract: The parallel-plate plastometer provides a simple experimental method for determining the rheological properties of plastic fluids. Previous theoretical analyses of flow in the plastometer have lead to conflicting results. In this paper, a numerical method is used to solve the plastometer flow problem and resolve some questions regarding the theoretical analysis. The plastometer problem is also used to demonstrate the accuracy of the numerical method in obtaining solution to non-trivial problems involving fluids with a yield stress.
109 citations
TL;DR: In this paper, a fast response plastometer was used to determine the torque required for constant rotation of a thin disc embedded within a thin layer of coal heated between two parallel metal plates.
62 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2021 | 1 |
| 2020 | 7 |
| 2018 | 2 |
| 2017 | 2 |
| 2016 | 4 |
| 2015 | 6 |