General Catalog

Stability measuring instruments
Thermal stability of PVC
763 PVC Thermomat
Automatic determination of the thermal stability
of PVC
With the 763 PVC Thermomat Metrohm offers the first
fully PC-controlled instrument for the determination of
the thermal stability of PVC plastics. The software for
data recording and storing in a database with automatic
evaluation of the curves is included in the scope
of delivery. Two heating blocks allow the measurement
of 8 samples at one or two different temperatures. Up
to four 763 PVC Thermomats can be connected to a
PC and operated simultaneously by the included software.
Highest flexibility is achieved by individual management
of each sample and heating block. Disposable
sample reaction vessels reduce the cleaning procedure
to a minimum.
Thermal stability of PVC
Chlorinated plastics based on polyvinylchloride (PVC)
decompose at elevated temperatures releasing gaseous
HCl. This product of the thermal decomposition is
blown off by a stream of nitrogen into the measuring
cell filled with distilled water. The thermal stability of
PVC materials is defined as the time that elapses until
HCl is released, and is determined by measuring the
conductivity in the measuring cell.
Ordering information
2.763.0014 763 PVC Thermomat (230 V)
2.763.0015 763 PVC Thermomat (115 V)
Options
6.5616.000 GLP Test Set for 743 Rancimat and 763
PVC Thermomat
Standards
• DIN 53381 part 1: Determination of the Thermostability
of PVC
• DIN VDE 0472 part 614: Examination of insulated
cables - Thermostability
• ISO 182 - 3: Plastics - Determination of the tendency
of PVC based polymers to evolve HCl at elevated
temperatures - part 3: Conductometric method
763 PVC Thermomat
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