ISO Laboratory Tga DSC Thermal Analyzer Differential Scanning Calorimeter for Plastic Material

Product Description

Product Description

Differential Scanning Calorimeter

1.Introduction

This machine is a new type of thermal analysis instrument with three major characteristics: intelligence, miniaturization, and unit combination. It is widely used in the research and development of melting, solidification, decomposition, combination, reduction and oxidation, crystallization, phase diagram production, and catalysts of substances. It is the main analytical method for organic, inorganic, polymer, mineral, petrochemical, textile, and pharmaceutical products, and has a convenient computer data processing system.
This machine uses Italian imported sensors with high sensitivity. The signal acquisition circuit is shielded and protected, with strong anti-interference and high baseline stability. The differential scanning calorimeter is a touch screen type, which can perform oxidation induction period test, melting point test, glass transition temperature test, phase transition test, thermal enthalpy value test, product stability, curing, etc. It has a wide range of applications.
 

2.Main technical parameters and instrument use conditions

1. Temperature range: room temperature ~ 600ºC (air cooling)
2. Temperature resolution: 0.01ºC
3. Temperature fluctuation: ±0.01ºC
4. Temperature repeatability: ±0.1ºC
5. Heating rate: 0.1~80ºC/min
6. Constant temperature time: program setting
7. Temperature control method: PID temperature control, heating, constant temperature (fully automatic program control)
8. DSC range: 0~±600mW
9. DSC resolution: 0.01uW
10. DSC sensitivity: 0.01mW
11. Working power supply: AC220V/50Hz or customized
12. Atmosphere control gas: nitrogen, oxygen (automatic switching of the instrument)
13. Gas flow: 0-200mL/min
14. Gas pressure: 0.5MPa
15. Display mode: 24bit color, 7-inch LCD touch screen display
16. Data interface: standard USB interface
17. Parameter standard: equipped with standard materials (indium, tin), users can calibrate the temperature by themselves
18. The instrument has multiple sets of thermocouples, one set for testing sample temperature, and one set for testing the internal ambient temperature of the instrument
19. The instrument has a multi-point calibration function, which can meet the precise testing of high, medium and low samples
20. The software can set the data acquisition frequency, and can export EXECL data packages and PDF reports
21. Curve scanning: temperature rise scanning, constant temperature scanning

Detailed Photos

 

3.Working principle and structure of the instrument

Differential scanning calorimetry is a technique that measures the power difference between a substance and a reference substance as it changes with temperature under program temperature control. The TC-3600 differential scanning calorimeter is mainly composed of a heating furnace, a host, a microvolt amplifier, an A/D converter, a data acquisition system, a cooling system, a gas flow control system computer, a printer and other components. The two-way atmosphere is fully automatically switched, and the measurement results are processed by a computer data processing system. Its schematic diagram is shown in Figure 1.

3.1 Temperature control system

The system consists of temperature controller, thyristor, temperature-controlled platinum resistor (imported) and reaction furnace (imported). The computer gives a temperature signal according to the set program temperature. When the temperature-controlled platinum resistor value deviates from the given resistance value, it means that the furnace temperature deviates from the given value. The deviation signal is adjusted by the phase-shift trigger and thyristor to adjust the heating furnace power so that the furnace temperature can track the set value well and produce an ideal temperature curve. The schematic diagram of the instrument working principle is shown in Figure 1

Figure 1 Schematic diagram of instrument working principle

3.2 DSC Signal measurement system

Figure 2 Schematic diagram of DSC curve
The system consists of differential thermocouples, microvolt amplifiers, A/D converters, etc. The sample holder is composed of a pair of differential thermocouples, alumina rods, etc. Before the test, the sample and the reference material (-alumina powder) are placed in two crucibles respectively. The heating furnace is heated at a certain heating rate. If the sample has no thermal reaction, the DSC curve is a straight line, called the baseline; if the sample has an endothermic (or exothermic) reaction in a certain temperature range, a temperature difference is generated. After the temperature difference signal is sent to the microvolt amplifier for amplification, the generated power difference is sent to the A/D converter and output to the computer. After being processed by the computer, the DSC curve is drawn on the display.

4.General functional map

1. Oxidation induction time test of PE, PP and other materials:
Oxidation induction time (OIT) is tested by DSC (differential scanning calorimeter). The sample is usually heated to a specified temperature and kept constant in a nitrogen atmosphere, and then automatically switched to an oxygen atmosphere. After a period of time, the material begins to oxidize and release heat. This released heat is detected by the sensor, and the induced oxidation time (OIT) is obtained through software analysis. The length of the oxidation induction time is a parameter of the reaction material's resistance to oxidative decomposition, which is very meaningful. Usually, buried plastic pipes, insulation pipe outer sheaths, wire outer sheaths, etc. must test this parameter.




2.Material melting point test (thermal stability test)
The melting point is the temperature at which a solid changes its physical state from solid or melts into liquid. For a mixture of multiple components, the peaks that emerge are also multiple peaks.
This function is also an authoritative test method to determine whether PE materials (especially recycled materials) contain PP components.

Configuration list
 

Host	1pc
U disk	1pc
Data cable	2PCS
Power cable	1 PC
Aluminum crucible	200PCS
Metal cover	3PCS
Raw tape	1 coil
Pure tin particles	1 bag
10A fuse	5pcs
Sample spoon/sample pressure rod/tweezers	Each 1
Ear suction ball	1
Trachea	2PCS
Instruction manual	1
Warranty certificate	1
Certificate of conformity	1