Differential Scanning Calorimetry (DSC)

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$Glancing Angle X-ray Diffraction (GAXRD) Technique$

DSC: Cell Schematic Diagram Chromel Disc Dynamic Sample Chamber Reference Pan Gas Purge Inlet Heating Block Alumel Wire Chromel Wire DSC: Cell Components Sample Pan Lid Chromel Disc Thermocouple Junction Thermoelectric Disc (Constantan) Silver Furnace: for good temperature uniformity Sample Purge: for excellent oxidative stability measurements Purge Preheated: for very low noise from turbulence Air Cool: for fast return to room temperature
DSC: Heat Flux Principle The differential temperature ( ∆ T) between the sample and reference is converted to differential heat flow in a way that is analogous to current flow in Ohms Law. I = E/R where: I = current E = voltage (potential) R = electrical resistance ∆ Heat Flow = T k 1 k 2 where: R ∆T = temperature difference (potential) R = thermal resistance of constantan disk k 1 = factory-set calibration value k 2 = user-set calibration value DSC: How Heat Flux is Measured • Heat flow through the chromel wafer causes a temperature difference ∆T. The temperature difference is measured as the voltage difference ∆U between the sample and reference constantan/chromel junctions. The voltage is adjusted for thermocouple response S and is proportional to heat flow. ∆T = ∆U / S ∆T in °C ∆U in µV S in µV/°C
Page 1 and 2: Differential Scanning Calorimetry (
Page 3 and 4: DSC: Definitions A calorimeter meas
Page 5: DSC: Heat Flow Measurement Alumel w
Page 9 and 10: PDSC Pressure DSC (PDSC) : capabili
Page 11 and 12: DSC: Typical DSC Transitions Heat F
Page 13 and 14: DSC: Heating/Cooling Method Heating
Page 15 and 16: DSC: Calibration & Sample Preparati
Page 17 and 18: Heat Flow (W/g) DSC: Temperature Ca
Page 19 and 20: DSC: Traceable Calibration Material
Page 21 and 22: DSC: Effect of Heating Rate on Indi
Page 23 and 24: Heat Flow (W/g) 0.5 0.0 -0.5 -1.0 -
Page 25 and 26: DSC: Baseline Curvature Heat Flow (
Page 27 and 28: Cell Constant DSC: Recommended Purg
Page 29 and 30: DSC: Sample Preparation (cont.) �
Page 31 and 32: DSC: Experimental Conditions �Hea
Page 33 and 34: DSC: Sample Preparation - Hermetic
Page 35 and 36: DSC: Selecting Experimental Conditi
Page 37 and 38: Selecting Experimental Conditions
Page 39 and 40: Heat Flow (W/g) Heat Flow (W/g) DSC
Page 41 and 42: DSC: What is the Glass Transition?
Page 43 and 44: DSC: What Affects the Glass Transit
Page 45 and 46: Effect of Cooling Rate on Tg Heat C
Page 47 and 48: DSC: Effect of Molecular Weight on
Page 49 and 50: DSC: Effect of Side Chains on the T
Page 51 and 52: DSC: Terminology �Amorphous Phase
Page 53 and 54: Baseline Types: Linear Heat Flow (W
Page 55 and 56: DSC: PET/ABS Blend "As Received" He
Page 57 and 58:
DSC: Effect of Heating Rate on Nylo
Page 59 and 60:
∆T Exothermic DSC: Isothermal Cry
Page 61 and 62:
DSC: Effect of Polymer Type on Melt
Page 63 and 64:
DSC: Effect of Draw Ratio on Meltin
Page 65 and 66:
DSC: Specific Heat Capacity �What
Page 67 and 68:
DSC: Specific Heat Capacity Equatio
Page 69 and 70:
DSC: Specific Heat Capacity Step 3.
Page 71 and 72:
DSC: Effect of Aging on the Specifi
Page 73 and 74:
DSC: Modulated DSC TM �Theory �
Page 75 and 76:
Heat Flow Heat Flow Kinetic Heat Fl
Page 77 and 78:
Distribution of Transitions in MDSC
Page 79 and 80:
Temperature (°C) Temperature Chang
Page 81 and 82:
Conventional DSC Cp Measurement Cp
Page 83 and 84:
Reversing Heat Flow from MDSC Raw S
Page 85 and 86:
Glass Transition of Polymer Resin M
Page 87 and 88:
MDSC: Detection of Two Glass Transi
Page 89 and 90:
MDSC: Heat Capacity vs. Cure Time T
Page 91 and 92:
MDSC: Sample Pans Standard Hermetic
Page 93 and 94:
MDSC: Heat Flow (Cell Constant) Cal
Page 95 and 96:
K(Cp) K(Cp) MDSC: Heat Capacity Cal
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Differential Scanning Calorimetry (DSC)

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