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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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2019-03-08
1.Brief introduction Due to influence of thermal history, various properties of polymers will change, especially thermal properties of crystalline polymers. Thermal history of polymer is affected by various factors such as preparation process, storage conditions, and usage environment. Usually, thermal history of materials is studied by thermal analysis and viscoelasticity measurement. This paper ...
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2019-02-21
Abstract: DSC, TGA and TMA techniques are used for systematical study of glass transition, thermal degradation, thermal oxygen degradation, HCl removal process and deformation characteristics of ABS / PVC / NBR alloys. The results show that various changes in ABS / PVC / NBR alloy are accompanied by changes in energy, mass and dimension. Glass transition temperature is an important parameter to ch...
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2019-01-21
Advantages of Thermal Analysis Crucible Cover: Improving the temperature distribution in the crucible is conducive to uniform temperature inside the reaction system. Effectively reduce the influence of radiation effect and sample color. Prevent the flying of extremely light fine sample powder and prevent it from drifting away with the dynamic atmosphere or being taken away in the process of vacuum...
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2019-01-16
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 surface oxide layer. It is easily soluble in dilute sulfuric acid, nitric acid, hydrochloric acid, sodium hydroxide and potassium hydroxide solutions, and hardly soluble in water. Relative density 2.70. Melting...
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2019-01-02
The glass transition, thermal degradation, thermal oxygen degradation and desorption of ABS / PVC / NBR alloy were studied by DSC, TGA and TMA techniques. The HCl process and deformation characteristics are systematically studied.The results show that various changes in ABS / PVC / NBR alloy are accompanied by changes in energy, mass and geometry. Glass transition temperature is an important param...