Is there any possibility to change internal structure of the polymer nano-composites after extruding the nano-composites via a melt extruder? Any reference will be appreciated. Thanks in advance.
I think the correct answer for your question is "yes and no". Because there are too many unclear points in your topic; which or what kind of polymer, which nanofiller, what you mean as "internal structure" (e.g. Mw of polymer, crystallinity, filler dispersion, Af, adhesion...). Basicly, strutural properties of polymer nanocomposite depend on many parameters that should be taken into account.
Please specify your goal and the technical point you would like to learn and discuss.
Yes, it is possible when the extrusion causes an orientation for the polymer/reinforcement.
https://pdfs.semanticscholar.org/34dc/d35df6a92ba6a0f87dae3183d53ea6981668.pdf
http://publications.lib.chalmers.se/records/fulltext/237227/local_237227.pdf
Article Effects of extrusion on the structure and properties of high...
Article Orientation in extruded polyethylene films
Article Analysis of molecular orientation and internal stresses in e...
Good question. The structural difference will be a function of several factors, not just extrusion. The type of amorphous polymer and the charge (depending on the type of charge, size of the grains and composition) will influence the structure of the nanocomposite.
There are several points that need to be clarified to answer properly your question: do you really mean structure or rather meant morphology?
The morphology and properties of these complex mixtures depend on the various components mixed, their formulation, the mixing procedure, the process and temperature history up to the day of the observation of the morphology and the properties.
If you wanted to know whether it is possible to change the structure of a nano-composite blend utilising further extrusion then the short answer is: Yes.
If you wanted to know whether it is possible to change the structure or morphology of a nano-composite after extrusion then the short answer is: Yes.
These answers are for thermoplastic nanocomposites that are in a non equilibrium state. Thermosets, for all practical purpose, will not be improved but rather damaged with futher processing unless it is only for post curing.
Thanks everyone. I am working with a thermoplastic polymer composites adding carbon particles as a filler. Just wondering if the the interactions of filler with the polymer changes after extruding the composites.
If you have other smaller molecules as additives: it may.
If the Tg of your polymer is below temperature of use: it may.
If other environmental molecules diffuse in your composite: it may.
If other environmental radiations interact with the strcture of the polymer: it may.
In summary, it is a non equilibrium state that depends on the thermodynamics of your system.
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