Rheometer

Brief Description

Rheometer is An Instrument for Rubber Quality Monitoring (As per ISO Standard 3417:1977 (E) . It is used in polymer (specially rubber) related industries for testing the quality of rubber/polymer materials, so that desired quality with the desired properties and characteristics may be attained. Rheometer describes the curing and processing characteristics of curable elastomers quickly and precisely. It is an instrument which is economically applied in compound development, raw material evaluation and production quality control.

A fixed volume uncured elastomer sample is taken out of the sheet of raw material and placed in a test cavity under a positive pressure and maintained at an elevated temperature in the range of 150-200°C. A biconical disk embedded in the test specimen oscillates through a small arc sinusoid ally. The oscillating disk exerts a shear strain on the sample. The force required to move the disk is directly proportional to the resistance (shear modulus) of the material. This torque is recorded with respect to time.

This graph is called Rheogram from this graph, certain parameters are calculated which characterize the quality of sample. the rubber technologist/chemist can then control the additives / fillers / plasticizers to adjust its properties according to the application.

Salient Features

• Dedicated PID temperature controller for ensuring rapid and reproducible thermal control
  
• Fast curing from directly heated dies to minimize the effect of operator variables
  
• Automatic display of standard results with cure curve on monitor and provision of hard copy with one key stroke
  
• Motorized shutter for added operator safety
  
• On-line display of existing status of functional components through annunciation
  

Applications

Rheometer is used in Rubber industry . to measure the elastic properties of the samples. The industry needs this equipment to determine the dynamic elastic properties and to check the uniformity of the strength of rubber.

Contact:

Central Scientific Instruments Organisation,
Chandigarh
Website: http://www.csio.res.in/