I'd like to compare the degree of crystalinity in a PA-9T component that is moulded by two different suppliers. I suspect there is a difference which may be causing us some issues. Is there a straightforward way of doing this?
Milan Šljivić
Dear Eric,
The answer to your question in this article: "Forward to Better Understanding of Optimized Performance of Welded Joints: Local Reinforcement and Memory Effects for Polyamides" - [PDF]download - BASF.com
Best Regards
Milan Sljivic
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Yousef Jahani
It is easy. Run a DSC test and determine the heat of melting Hf (j/g) and then use the hereunder formula:
Degree of crystalinity = (Hf (j/g)/(H0* w))*100
H0 is enthalpy of fusion of 100% crystalline PA 9- You may find it by searching on net
w is percent of PA 9 in the composite
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