Hello everyone
Based on the calculation of the enthalpy peaks of crystallization and melting of the DSC test of the provided PLA sample, the crystallinity degree is 12.2%. I don't know if this achieved percentage is logical or not. Kindly, take a look at the attached result and tell me if my calculation was right or not.
P.s = the cooling rate was 30˚ C/min.
Best regards.
Dear Milad, thank you for asking this very interesting technical question concerning the crystallinity of PLA (= poly(lactic acid)). In this context please have a look at the following useful research article which mght help you in your analysis:
Crystallization of PLA-based Materials
Chapter Crystallization of PLA-based Materials
This paper has been posted on RG as public full text, so that it can be freely downloaded as pdf file.
I hope this help. Good luck with your research and best wishes, Frank Edelmann
Dear Frank T. Edelmann
Thank you so much for your guidance and contribution. I'll surely check the paper that was mentioned before.
Best wishes and regards.
you can make use from this link
https://link.springer.com/article/10.1007/s10965-020-02337-5
and this paper
Dear Nadir Fadhil Habubi
Thank you so much for your contribution. I'll read both references were mentioned.
Best regards.
In your question you do not specify what kind of PLA you're dealing with.
The degree of crystallinity changes a lot from PLLA (or PDLA) to PDLLA. The two isomerically pure forms will give you high degrees of crystallinity (can be >50%), while the mixed form PDLLA can be almost totally amorphous. If you're measuring PDLLA a degree of crystallinity around 12% is likely to occurr.
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