Optical fibre by the looks - you don't actually say. I used to work at the Corning UK plant that made Optical Fibre and know a bit about it.
The coatings have three distinct roles - optical, mechanical and protective. The inner layer is an optical coating which has a lower refractive index - this traps light in the core through internal reflection.
There is then a buffer layer which has the role of protecting the delicate fibre during installation and normal operation. Then there is an outer coating - normally 2 or 3 distinct layers. The first provides a 'shock absorption function', the second provides mechanical protection from the environment. Sometimes (submarine OF for example) there is an additional outer layer to provide extra protection from corrosion (in the case of submarine cable) or whatever environmental hazards are found in that particular application.
Now, your job is to work out which layers correspond to which chemicals - not too tricky....
I'm working for fibre and materials industry for a period of time, 20Y+.
However, I'm not a expert.
I think Bakerman gave very good indirect answers.
Sorry, I have no such intelligence to provide direct answers.
However, I have following questions for geekbackpacker:
Why polyamide used for tootbrush?
Why aramid used for "bullet-proof"
Why polyvinyle chloride "PVC" used for power cord outer?
Hope you can find the answers soon.