Greeting, in my study I am using reinforced polyester as primer with addition of self healing agent. What should be suitable testing/characterization in order to study the self healing as well the mechanism/reaction of the material?. Thankyou.
Dear Adzrie Baharudin,
Nondestructive testing methods can effectively validate self-healing properties of construction materials, aiding future research on self-healing properties. Raman spectroscopy offers promising non-destructive in situ characterization of self-healing materials, particularly polymers and biopolymers, to better understand their chemical mechanisms and improve their reliability and safety in various applications. Therefore, Self-healing phenomena on the micro- and nanoscale can be confirmed through characterization methods, such as scanning electron microscopy, to confirm the release of healing agents from nanofibers, spread, react, and solidify. Self-healing polymers can be characterized using various techniques, including visual, spectroscopic, scattering, and dynamic methods, to understand their molecular mechanisms and future trends.
With best wishes
Hi Adzrie Baharudin ,
I would definitely try oscillatory rotational rheology, as this will give you the elastic and viscous moduli of the materials (as mentioned in 6 and 10 above by Balram).
The ability for a material to self-heal will likely be related to Tan delta (which is the Viscous modulus / Elastic modulus), and the speed of self-healing should be related to 1/complex viscosity.
I'd be surprised if there's a chemical reaction type change in the sample with addition of the healing additive, but you could check that with DSC to see if there's an exotherm. Possibly the mechanism of the "seal-healing" additive is that of lubrication or adhesion?
Best regards,
Phil
I think you should specify the primarily important "healing goal" for your material. I do not agree with the Balram because listing all analytical tools does not provide a technical solution.
As you indicated as "reinforced polyester coating", final form of your material is probably a solid and crosslinked system, adhesive, applied as thin film and includes encapsulated self-healing agent. Healing for scratching, tearing, puncturing would be improtant and you might focus on optical characterizations. Rheology would not help to understand healing efficiency of resin-based covalently bonded systems. It is more related to non-covalently interacted healing mechanism.
Thankyou Dr. Ali F. Al-Shawabkeh for the suggestion. we are not familiar with Raman Spectroscopy yet.. is there any journal or paper that you might suggest than be references to us? Based on our understanding it will provide to understand the structure of the material right? Ali F. Al-Shawabkeh
Very interesting share from Mr Philip Rolfe , I am interested also on the healing ability of the self healing agent itself. That mean it could be find if we are using DMA right? Is there any reference/journal that you may suggest? we had done the DSC and find out there are changes in the result. We are try to apply the material as coating from corrosion protection. So it should be good in adhesion as well.
Thankyou for your suggestion and ideas Dr. Ali Durmus and Balram Lohan ..
Based on Dr. Ali Durmus suggestion, is that you stated that the optical characterization is sufficient enough to prove the healing properties of the coating? Thank you in advance for your answer.
Hello Adzrie Baharudin , Yes if you can get accurate results in the DMA system, that will also work for this analysis. I apologize that I don't have a reference.
Best regards,
Phil
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