Thiết bị phân tích nhiệt quét vi sai DSC PT 1000/LINSEIS

Model:
DSC PT 1000
Hãng sản xuất:
LINSEIS
Xuất xứ:
Germany

State of the Art DSC with user exchangable Metal Sensors Temperature range -180 to 750°C price range: $$-$$$

Danh mục:
Lượt xem:
1871

Giới thiệu
Thông số kỹ thuật
Ứng dụng và tiêu chuẩn
video
Tài liệu

This product was developed to provide a general purpose TM – DSC with a broad temperature range (-180 – 600°C) for all common applications. Furthermore emphasis was placed on an extremely stable baseline and high reproducibility. The design allows manual and automatic operation. The conception of the cell guarantees maximum mechanical and chemical resistance.

The key part of every DSC is the sensor, so don’t make any compromise. Up to now it has been impossible to achieve highest resolution and sensitivity in one sensor. The revolutionary design of the HiperRes® Sensor line now enables just that. The Ceramic/Metal Sensor deliver outstanding resolution in combination with superior reproducibility.

This permits the detection of smallest thermal effects. The metal-ceramic sensor structure ensures shortest possible time constants, permitting the separation of overlapping effects over the full temperature range. Unlike competing metal sensors the ceramic design does not oxidize and thus can be used ongoing over the full temperature range without aging effect.

MODEL	DSC PT 1000*
Temperature range:	-180°C … 600°C
Price range:	$$
Heating rates:	0.01 K/min … 100 K/min
Cooling rates**:	0.01 K/min … 100 K/min
Sensor:	heat flux
Vacuum:	–
Sample Robot:	42 Positions
PC Interface:	USB

MODEL	DSC PT1000 HIRES*
Temperature range:	-180°C … 750°C
Price range:	$$$
Heating rates:	0.001 K/min … 300 K/min
Cooling rates**:	0.001 K/min … 300 K/min
Sensor:	heat flux & power compensation
Vacuum:	Yes (optional)
Sample Robot:	84 Positions
PC Interface:	USB

Applications example: Fructose, Glucose and Saccharose

The three evaluated substances (Fructose, Glucose and Saccharose) show distinctive melting points. These melting points can be precisely determined by means of Differential Scanning Calorimetry (DSC). For this the analytical method is frequently used for the determination of unknown substances. Even mixtures with identical molecular weight such as Fructose and Glucose can thus be recognized.

Differential_Scanning_Calorimetry_Food_measurement

Applications example: Thermoplasts

PolyEthylenTherephtalat (PET) shows a significant endothermic glass point at about 76.9°C, which is quite special for partly crystalline thermoplasts. The relation between the exothermal cold crystallization at 131.0°C and the endothermic melting peak is a measure for the degree of crystallization of the material. In the case of (PET) the crystalline part is very small which results in a good transparency of the material.

Differential_Scanning_Calorimetry_Polymer_measurement

Application example: OIT “Oxidative Induction Time”/ Temperatur

Initially the polyethylene sample is heated up to 200 °C under argon atmosphere with a heating rate of 10 K/min. After 3 minutes at the equilibrium the environment is changed from argon to oxygen. After an additional 5 minutes the exothermal oxidation of the sample starts.

Differential_Scanning_Calorimet_Oxidative-induction_time

Application example: Auto-ignition of cotton fibers

A sample of cotton fiber, containing inorganic minerals, was measured by DSC PT 1000 to determine the auto ignition temperature (ignition point) and heat of combustion of the cotton content. It is important to distinguish between the flash point and the ignition point.

The flash point describes the temperature at which a substance is inflamed by means of an external ignition source, such as spark, while the auto ignition temperature is the temperature at which a substance inflames without an external ignition source.

The cotton mass sample was heated in the Linseis DSC PT 1000 from room temperature to 600 °C at 10 K/min. The results graph shows the heat flux signal (black curve) and the derivative of the signal (blue curve) as the cotton mass was heated. The cotton mass started to oxidize at 435.4 °C and was completely combusted by 461.6 °C.

The total energy released by the combustion reaction of the cotton mass was 60 J/g as calculated by the area of the heat flux peak using the Linseis evaluation software package.

Linseis DSC 1000 Autoignition cotton fibers