Highlights
특정한 반응을 위한 높은 압력하에서의 DSC
수많은 물리적 반응과 화학적 반응은 주위 가스 압력에 의해 영향을 받습니다. 이에 따라 증가된 압력하에서 DSC 측정의 필요성이 증가되고 있습니다.
고압 DSC 204 HP Phoenix®로, 한 시료에서 열적 영향은 진공에서부터 15 MPa (150 bar)까지의 압력 범위, 가스의 종류에 따른 -150°C부터 600°C까지의 온도 범위에서 분석됩니다.
시료 챔버 분위기는 정적, 동적 분위기가 가능합니다. 분위기 가스의 정확한 조절에 따른 전자식 압력 조절 기능은 우수한 정확성과 측정 결과의 재현성을 제공합니다
이미 검증된 액체 질소 냉각용 CC200L은 낮은 온도 범위에서 사용이 가능합니다. 고압 DSC 시스템의 안정성은 설계 시험을 통해 검증 되었고, 안전한 가동은 적합한 안전 장치에 의해 보장됩니다.
NETZSCH Analysis Instruments at Harvard University
"We chose to work with NETZSCH’s HP-DSC because of its versatility and robustness. By allowing us to reliably access high pressures up to 150 bar with a wide range of gas environments, NETZSCH’s HP-DSC has greatly facilitated our group’s efforts to investigate Phase TransitionsThe term phase transition (or phase change) is most commonly used to describe transitions between the solid, liquid and gaseous states.phase transitions in next-generation thermal materials."
Prof. Jarad Mason - Assistant Professor of Chemistry and Chemical Biology at Mason Group at Harvard University
Method
High-Pressure Differential Scanning Calorimetry (HP-DSC)
Differential Scanning Calorimetry (DSC) allows not only for the determination of phase transformation temperatures but also for the quantification of transformation enthalpies.
A type of modified DSC, in which the measurement cell is installed in an autoclave (a "pressure DSC"), allows measurements to be carried out at pressures ranging from 5 kPa to 15 MPa (high-pressure DSC).
High-pressure DSC measurements can be performed in inert or reactive gas atmospheres. When an inert gas is used, the pressure dependence can be studied when the sample transformation (usually a caloric effect) is also accompanied by a volume change. This allows dehydration and Decomposition reactionA decomposition reaction is a thermally induced reaction of a chemical compound forming solid and/or gaseous products. decomposition reactions with gas release to be studied by pressure DSC. When a reactive gas is used, the gas becomes one of the reactants and the pressure is a measure of its concentration. This method can be used to perform aging tests on organics (such as oils, fats, waxes, greases, etc.) and polymers.
Measuring Principle of a High-Pressure DSC
In contrast to the setup of a regular DSC, the measuring cell of a high-pressure DSC (HP-DSC) is surrounded by an autoclave which is supported by pressure and gas flow control systems.
Pressure and purge gas flow are adjusted via a separate control board. With the help of liquid nitrogen cooling, it is even possible to achieve temperature programs in the subambient range.
The heating and cooling rates achieved (0.01 K/min to 100 K/min and to 50 K/min, respectively) as well as the maximum and minimum temperatures are significantly influenced by the atmosphere and pressure used.
Specifications
기술사양
넓은 압력 범위
정확한 압력 조절
승온 속도
온도 범위 (가스 형태에 따라):
-150°C ... 600°C (1 bar에서)
-90°C ... 600°C (50 bar에서)
-50°C ... 450°C (150 bar에서)
다른 분위기에서 측정.
환원: N2, 순수 가스
reducing: H2
산화: O2, CO2, air
(필요에 따라 다른 종류의 분위기 가스 가능)
500 ml/min까지 정확한 가스 유량 조절
Software
Proteus®: Excellent Thermal Analysis Software
The DSC 204 HP Phoenix® runs under Proteus® Software on Windows®. The Proteus® Software includes everything you need to carry out a measurement and evaluate the resulting data. Through the combination of easy-to-understand menus and automated routines, a tool has been created that is extremely user-friendly and, at the same time, allows sophisticated analysis. The Proteus® Software is licensed with the instrument and can of course be installed on other computer systems.
DSC features:
- Determination of onset, peak, inflection and end temperatures
- Automatic peak search
- Transformation enthalpies: analysis of peak areas (enthalpies) with selectable baseline and partial peak area analysis
- Evaluation of CrystallizationCrystallization is the physical process of hardening during the formation and growth of crystals. During this process, heat of crystallization is released.crystallization
- Comprehensive Glass Transition TemperatureThe glass transition is one of the most important properties of amorphous and semi-crystalline materials, e.g., inorganic glasses, amorphous metals, polymers, pharmaceuticals and food ingredients, etc., and describes the temperature region where the mechanical properties of the materials change from hard and brittle to more soft, deformable or rubbery.glass transition analysis
- Automatic baseline correction
- Specific heat determination
- Recording and evaluation of the pressure signal
Consultancy & Sales
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Service & Support
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Downloads and Media
Brochures
DSC 204 HP Phoenix®Brochure(pdf – 2.02 MB)
DSC 204 HP Phoenix®Data Sheet(pdf – 27 KB)
Accessories for Differential Scanning Calorimeters and ThermobalancesAccessories Catalogue(pdf – 8.87 MB)
Thermal Characterization of PolymersBrochure(pdf – 4.88 MB)
Shape the future of paints and coatingsBrochure together with Malvern Panalytical(pdf – 1.45 MB)
