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2019-05-09
Advantages of lidded Thermal Analysis Crucible: Improving temperature distribution in the crucible, which favors uniform temperature inside the reaction system. Effectively reducing the influence of radiation effect and sample color. Preventing extreme light sample powder from flying and drifting away with the dynamic atmosphere or being taken away in the process of vacuum purge. Sensor can be eff...
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2019-04-24
Thermal analysis is an analytical method to study the relationship between physical and chemical changes and temperature of materials. This article summarizes application of thermal analysis technology in research field of traditional Chinese medicine. 1. Classification of Methods of Thermal Analysis Technology There are various types of thermal analysis methods, among which differential thermal a...
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2019-04-16
1. Introduction to Thermal Analysis Thermal analysis (TA) is a technique that records the functional relationship between physical properties and temperature of sample under the programmed temperature conditions. The most commonly used TA methods are differential thermal analysis (DTA), differential scanning calorimetry (DSC) and thermogravimetry (TG). The most commonly used thermal analysis cruci...
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2019-04-02
Standard Test Method for Curing Properties of Extruded Resins by Thermal Analysis Original standard name: standard test method for testing the curability of extruded resin by thermal analysis using thermal analyzer sample pan Standard number: NB/SH/T 0859-2013 Issued by: American Society of Materials and Tests (ASTM) Accelerated Storage Test, Thermal Analysis Methods for Dangerous Goods. Different...
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2019-03-28
1.Experimental part 1.1 Raw material Ammonia ester modified liquefied MDI (U-MDI ), NCO%=28.4 %, functionality 2, ethylene oxide terminated polypropylene oxide polyether (PPO), ZS-2185, Mn=2000, [K+]<5ppm, primary hydroxyl content>70% in DETDA, 2,4-isomer/2,6-isomer=80/20. MDA and catalyst dibutyltin dilaurate are chemical reagents, catalyst dosage: 2.0×10-1g cat./g PPO. 1.2 Sample pre...
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2019-03-25
25.44 26.12 26.68 27.18 27.63 28.07 28.52 29.00 29.53 30.11 30.75 31.43 32.17 500 24.88 25.57 26.14 26.62 27.06 27.48 27.91 28.37 28.87 29.43 30.03 30.70 450 24.36 25.06 25.63 26.11 26.54 26.95 27.36 27.79 28.26 28.79 29.37 400 23.85 24.58 25.16 25.65 26.07 26.46 26.85 27.26 27.71 28.21 350 23.37 24.12 24.73 25.22 25.64 26.03 26.40 26.79 27.21 300 22.89 23.68 24.31 24.82 25.25 25.63 25.99 26.37 25...
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2019-03-20
Differential scanning calculation (DSC) is a technique that under temperature control program, used to determine the relationship between the heat flow rate or power difference of samples and reference materials, and temperature or time under program control temperature. DSC has been widely used in the fields of material processing, chemistry, medicine, biochemistry, petroleum, aerospace, environm...
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2019-03-14
1. Experimental part 1.1 Experimental instrument DuPont 1090 thermal analyzer is used, thermal analysis sample crucible. 1.2 Experimental method DSC: Determination of glass transition of polymers and their alloys; TGA: Determination of thermal degradation, thermal oxidation degradation and constant temperature properties of polymers and their alloys; TMA: Determination of expansion coefficient and...
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2019-03-08
Aluminum crucible is the main supporting tool in thermal analyzer and the carrier of sample. Aluminum is a silver-white metal, which is protected from reaction with air and water due to its oxide layer on the surface. It is easily soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solutions, while hardly soluble in water. Relative density 2.70...
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