Differential Scanning Calorimeter (DSC) & OIT Tester

Introduction to DSC Machine and OIT Test (Advanced Thermal Analysis)

The Differential Scanning Calorimetry (DSC) machine is the beating heart of material analysis laboratories. By measuring changes in enthalpy and heat capacity relative to temperature, this instrument reveals vital information such as melting point, Glass Transition Temperature (Tg), and degree of crystallinity. However, its most critical application in the pipe and fittings industry is determining the Oxidation Induction Time (OIT), which is the primary benchmark for assessing the “lifetime” and thermal stability of polymers.

Key Feature: Fully Automatic Gas Switching

In the OIT test, the sample must first be heated in a Nitrogen environment, and exactly at the moment it reaches the isothermal temperature, the gas flow must switch to Oxygen. Doing this manually is prone to significant error. The DSC machine manufactured by Polymer Test is equipped with Smart Solenoid Valves that:

• Execute the switch from Nitrogen to Oxygen exactly according to the software program schedule.
• Control the inlet gas flow (Debit) and eliminate fluctuations.

Thermal Precision and Analysis Software

• Precision Furnace: Capable of heating up to 400°C with exceptional accuracy of 0.1°C and the ability to set custom Ramping Rates.
• Cooling System: Included for performing crystallization tests and controlling the cooling rate.
• PC Connection Software: Real-time plotting of the Temperature-Enthalpy graph with Auto-Scale capability and calculation of the area under peaks for energy analysis.

Complementary Material Identification Equipment

To fully identify raw materials (granules), in addition to thermal properties (measured by DSC), knowing the flow behavior of the material is also essential. Using the Melt Flow Index (MFI) Tester alongside the DSC provides you with the most complete quality control package for incoming materials.

International Standards

This machine covers all requirements of the following reference standards:

• Standard ASTM D3895 (Test Method for OIT of Polyethylene by DSC).
• Standard ISO 11357-6 (Determination of oxidation induction time).
• Standard ASTM D3418 (Transition Temperatures) and EN 728.

To receive the technical catalog and price inquiry for the DSC machine, please click the contact for purchase button or visit our contact us page.