How can I calculate the degree of crystallization for polymer, metal nanoparticle composite sing DSC analysis?
You must run a heat-cool-heat cycle, then to obtain the melting enthalpy from first and second heat, finally to compare with a calculated 100% cristallyne polymer, there are some published. The same process for the raw polymer is also useful.
DSC produces a heat flow (W/g or mcal/sec) vs temperature (K or Celsius) curve, see attached example.
Degree of crystallinity = ((Delta Hf - Delta Hc)/Delta Hf,100%) x 100%
where Delta Hf is the enthalpy of melting, Delta Hc is the enthalpy of crystallization, and Delta Hf,100% is the enthalpy of melting for a fully crystalline polymer which you will need to look up. Enthalpy is the area under each peak so to get enthalpy values for crystallization and melting you might be able to use a curve fitting software that comes with the DSC eqipment.
The degree of crystallinity is influenced by processing conditions and thermal history of the polymer so you need to consider your temperature ramping rates throughout the experiment which is how quickly the sample is heated and cooled.
http://pslc.ws/macrog/images/dsc08.gif
DSC is the one you get the degree of crystallization. You can do solid state NMR also to get the degree of crystallization.
Most of these answers are wrong. The equilibrium heat of fusion is temperature dependent, so you don't determine it by simply dividing the heat of fusion and the equilibrium heat of fusion. There is a special software on the Perkin-Elmer DSC's that can do the job (developed by Vincent Mathot).
Here is an easy calculator for the same,
https://www.instanano.com/2019/05/Percent-Crystallinity-Calculator-form-Differential-Scanning-Calorimetry-DSC.html
Actually there is relation between bdsc test and Christianity so this relation very important to know the real properties of materials.