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Session 1264

Study of Rheological Behavior of Polymers

Ping Liu Eastern Illinois University

Key Words: Polymer, rheological behavior, viscosity, temperature.

Introduction:

Rheology is the science dealing with deformation and flow of liquid-like materials such as polymer melts1. It provides necessary knowledge for processing plastics or other polymers into products. Liquid-like materials in many industrial processes possess a wide range of flow behavior. Satisfactory operation of these processes requires a knowledge of the material’s flow properties under operational conditions 2. Thus, understanding rheological behavior of materials can help improve the processing technology. Moreover, rheological behavior of polymer melts will also affect the ultimate material properties of products.

Figure 1 Principle of capillary rheological testing system

Rheometry is the art of measuring deformation and flow properties of materials. Figure 1 shows the principle of a typical capillary tube viscometer 3. Capillary rheometer is one of the simplest and most widely used instruments for rheological characterization. The barrel temperature is maintained at a preset level by a temperature controller. Thus, the polymer pellets in the barrel will be heated to and maintained at a constant temperature. A plunger drives the sample material through a slit capillary at either constant or programmed flow rate. When using

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Liu, P. (1998, June), Study Of Rheological Behavior Of Polymers Paper presented at 1998 Annual Conference, Seattle, Washington. 10.18260/1-2--7438