UV stabilising recycled plastic

Polymer Craft Research about plastic
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Hello all. I am in Australia where the sun is hot and the affect of UV on plastic is real. Has anyone looked into how to UV stabilise recycled plastic and how to determine the level of UV stability the final product will have.

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Since I posted my question about UV stabilising plastic I have done some more research and found a few companies that supply a wide range of additives for UV stability and many other properties for plastics. These products are available as pellets, liquid and powder. I’ll put the links below.

OnCap Polymer stabiliser
everlight-uva.com
guilda.com.au (Australian Company)

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@seditious1
I don’t know if this helps much for UV, but I’ve read a bit on using fine charcoal powders in plastics for added strength and fire resistance. It doesn’t bond molecular like you say, but it might be a tighter bond than you think.

I came across this last night, with electron microscope images, from your neighbors in NZ: https://link.springer.com/article/10.1007%2Fs00267-018-1033-6

Also, near us in the southeast USA, Albert Bates writes a lot about embedding charcoal/plastic composites.

I hope to get into this soon, and would love to hear if you’ve made any progress here. I’ve been keeping separate UV treated plastics from my others – agricultural drip tape has been good to us.

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Thanks BT. I have since found suppliers who sell the UV stabiliser polymer in pellet form. It is readily available worldwide.
I would be interested in knowing if simply adding carbon black or rutile would work as they would only be suspended participial in the polymer and not molecularity bound to it. Not being a molecularity engineer or chemist I am not sure of the implications here. I would assume the commercial UV stabiliser would have the active ingredients bound to its base polymer molecules.
If you or anyone else has a deeper knowledge of polymer engineering more information would be great.

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From my research, carbon black (or extremely fine milled charcoal) and rutile are commonly used. Rutile is also titanium dioxide paint pigment. rutile is produced in the Philippines and is local here, in other countries, maybe a commercial paint supplier?