| Summary: | 碩士 === 國立臺北科技大學 === 分子科學與工程系有機高分子碩士班 === 107 === This study is the crystallization kinetics of the Polyamide copolymers FAD-BABDA and FAD-BAHDA.
The sample was subjected to non-isothermal test using a differential scanning calorimeter (DSC) to test the crystallization peak interval, and this was used as the basis for different temperature isothermal test conditions, and the crystallization change was tested at different heating and cooling rates. The crystallinity of the crystallization temperature and its relationship with time can be calculated by isothermal and non-isothermal crystallization test results, and the data such as avrami index, crystallization rate and activation energy can be further calculated.
Isothermal crystallization Kinetics show that the n values of the four groups are mostly between 2~3; k value increases with temperature, and the crystallization rate tends to be slow; the activation energy will vary with the diamine chain length and content. From the analysis of the Regime transfer analysis, the samples have no phenomenon of Regime transfer.
The non-isothermal crystallization Kinetics shows that the crystallization peak has a left-biased phenomenon as the different heating and cooling rates increases. The k value increases with the heating and cooling rates, and the crystallization rate increases. The overall trend corresponds to the isothermal crystallization kinetics test results.
From the above it can be inferred that the methylene segment does have an effect on the crystallization behavior.
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