GBPI DSC-500 – Differential Scanning Calorimeter (Polymer Thermal Analysis & OIT)
- Research-grade differential scanning calorimeter for polymer thermal transitions and thermodynamic properties
- Full testing compliance with ASTM D3418, ISO 11357, GB/T 19466, ASTM E1356, and ASTM D3895
- Wide operational temperature range spanning from ambient to 550°C with resolution of 0.01°C
- Imported high-sensitivity thermocouple heat-flux sensor with multi-layer electromagnetic signal shielding
- Comprehensive thermal analysis: glass transition (Tg), melting (Tm), crystallization (Tc), and enthalpy (ΔH)
- Dedicated automated gas switching module supporting oxidation induction time (OIT) evaluation per ASTM D3895
- Integrated color touch-screen display coupled with advanced PC thermal analysis software
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The GBPI DSC-500 is an advanced, high-resolution heat-flux differential scanning calorimeter engineered for the precise quantitative measurement of thermal transitions, thermodynamic reactions, and oxidative stability across thermoplastic polymers, packaging films, synthetic resins, rubbers, and pharmaceutical compounds. Manufactured in strict conformity with premier international standards including ASTM D3418 (standard test method for transition temperatures and enthalpies of fusion and crystallization of polymers by differential scanning calorimetry), ISO 11357, and GB/T 19466, this instrument delivers certified thermal analysis for polymer characterization.
Thermal properties fundamentally dictate polymer processability during extrusion, thermoforming, and heat sealing operations. Subtle variations in resin molecular weight distribution, comonomer incorporation, recycled content ratio, or thermal degradation significantly modify melting points, crystallization kinetics, and baseline stability. Operating as a research-grade differential scanning calorimeter, the DSC-500 measures the differential heat flow between a specimen crucible and an inert reference crucible as both are subjected to a controlled, linear temperature program inside a low-thermal-mass furnace chamber.
High-Sensitivity Heat-Flux Sensor & Furnace Stability
The instrument incorporates an imported thermocouple sensor array possessing exceptional calorimetric sensitivity and baseline linearity. The miniature cylindrical heating furnace features multi-tier electromagnetic shielding and high-efficiency thermal insulation, maintaining temperature uniformity of ±0.1°C and eliminating external electrical interference across dynamic temperature scans.
Oxidation Induction Time (OIT) & Automated Gas Flow
Equipped with a dual-channel electronic mass flow controller, the DSC-500 automatically switches between inert nitrogen purge gas and pure oxygen at programmed isothermal holding temperatures. This capability enables standard oxidation induction time (OIT) testing per ASTM D3895, quantifying antioxidant thermal stability in polyolefin geomembranes, cable jacketing, and barrier multilayer packaging structures.
Widely adopted by polymer compounding plants, resin synthesis laboratories, quality control departments, and universities, the DSC-500 provides indispensable thermodynamic data to guide polymer formulation and conversion optimization. The integrated data acquisition architecture allows laboratories to determine glass transition midpoint, onset temperature, heat of fusion, and relative crystallization kinetics with certified precision and effortless curve reporting.
GBPI DSC-500 Differential Scanning Calorimeter – Technical Specifications
| Technical Parameter | Specification Details |
|---|---|
| Test Principle | Heat-Flux Differential Scanning Calorimetry (DSC) |
| Applicable Standards | ASTM D3418, ISO 11357, GB/T 19466, ASTM E1356, ASTM D3895 |
| Temperature Range | Ambient to 550°C (Standard Air Cooling) / Optional Sub-Ambient with Chiller |
| Temperature Resolution | 0.01°C (High-precision sensor acquisition) |
| Temperature Fluctuation | ±0.1°C (Isothermal holding stability) |
| Heating & Cooling Rate | 0.1°C/min to 80°C/min (Linear programmed temperature ramp) |
| Calorimetric Measurement Range | 0 to ±500 mW (Heat flow dynamic dynamic range) |
| Calorimetric Sensitivity & Resolution | 0.01 mW (Resolution: 0.001 mW) |
| Atmosphere Gas Control | Integrated Dual-Channel Gas Switching (N2 inert / O2 oxidizing) with Digital Mass Flow |
| Sample Crucible Types | Standard Aluminum Pans & Lids (Crimped), Alumina Ceramic, Copper Pans for OIT |
| Overall Instrument Dimensions | 450 mm (L) × 420 mm (W) × 320 mm (H) |
| Total Instrument Net Weight | Approximately 22 kg |
| Electrical Supply Requirements | AC 220V ± 10%, 50 Hz / 60 Hz Single Phase |
Key Performance Features of the GBPI DSC-500
- Imported High-Sensitivity Thermocouple Sensor: Delivers superior heat-flux resolution and baseline reproducibility, resolving subtle secondary glass transitions and subtle endothermic peaks.
- Wide Dynamic Temperature Window: Capable of heating from ambient up to 550°C with linear ramp rates from 0.1 to 80°C/min, accommodating both standard and accelerated kinetic scans.
- Automated Dual-Gas Switching Module: Electronic mass flow controller switches between nitrogen purge and oxygen at preset temperature triggers, automating Oxidation Induction Time (OIT) protocols.
- Electromagnetic Noise Shielding: Specially engineered signal acquisition circuitry protects thermocouple micro-volt signals from ambient laboratory electromagnetic interference.
- Intuitive Dual Operation Interface: Onboard color touch-screen display presents furnace status in real time, while USB PC software offers automated peak integration, glass transition midpoint determination, and multi-curve overlay.
- Compact Benchtop Footprint: Integrated furnace and electronic controller in a single low-profile chassis with forced convection air cooling for rapid turnaround between sample runs.
Standard Package & Accessories
| Item | Description | Quantity | Type |
|---|---|---|---|
| 1 | DSC-500 Differential Scanning Calorimeter Mainframe | 1 Set | Standard |
| 2 | High-Purity Standard Reference Calibration Materials (Indium, Tin, Zinc) | 1 Set | Standard |
| 3 | Standard Aluminum Sample Crucibles and Solid Lids | 200 Sets | Standard |
| 4 | Manual Crucible Sealing Press and Die Set | 1 Set | Standard |
| 5 | Dual Gas Flow Controller and Gas Tubing Connectors | 1 Set | Standard |
| 6 | Professional Thermal Analysis PC Software and Data Cable | 1 Set | Standard |
| 7 | Factory Calibration Verification Certificate and Operation Guide | 1 Set | Standard |
Primary Testing Applications
Polymer Identification & Crystallinity
Determination of melting peak (Tm), glass transition (Tg), and degree of crystallinity for polyethylene (HDPE, LDPE), polypropylene (PP), PET, and polyamides.
Oxidation Induction Time (OIT) Testing
Evaluating antioxidant depletion and thermal oxidative resistance in HDPE geomembranes, gas distribution pipes, and high-voltage power cable insulation.
Multilayer Packaging Film Deformulation
Resolving separate melting signatures in coextruded barrier webs (e.g., PE/EVOH/Tie/PA) to identify constituent polymers and laminate blend quality.
Thermoset Curing & Crosslinking Kinetics
Monitoring exothermic curing reactions, residual cure enthalpy, and cross-linking density in epoxy resins, polyurethane adhesives, and UV-curable inks.