Product category:
Titration equipment
News Release from: Metrohm UK | Subject: PVC Thermomat
Edited by the Laboratorytalk Editorial
Team on 24 December 2002
Instrument measures thermal stability of
PVC
The PVC Thermomat is designed for the determination of the stability time for PVC products to DIN Standard 53 381 Part 1
In order to quantify the thermal stability of PVC products, they have to be subjected to thermal stability tests The plastic product is heated to a temperature of 200C and the resulting hydrochloric acid vapours are transferred by a nitrogen gas carrier to a measuring vessel containing distilled water
This article was originally published on Laboratorytalk on 23 Jan 2004 at 8.00am (UK)
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Assessing the thermal stability of PVC
Comparison of pH and conductivity measurement for the determination of thermal stability of PVC pellets and pieces
Here the conductivity of the dilute hydrochloric acid is monitored.
The time, which elapses until a certain amount of decomposition product appears, is called the "stability time", which is product specific and depends on the decomposition temperature.
DIN Standard 53 381 Part 1 was drawn up for the determination of the stability time for PVC products; the PVC Thermomat is ideally suited for carrying out this determination automatically, reproducible and accurately.
The instrument's wet chemistry section can accommodate up to 8 different samples at a time, in two heating blocks of four samples.
Each heating block can be set at different temperatures over the range 50-220C. Request a free brochure from Metrohm UK ...
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