Yellowing of Polyarylate
Yellowing of Polyarylate
(OP)
Hi,
I have an application where I would like to use polyarylate. It will be solvent cast into a thin film, 10 micron or there about.
My only problem with this is that Polyarylate goes from clear, transparent to yellow when exposed to UV due to some rearrangement in the polymer chain.
I haven't seen for myself how bad this is and before we start spending time and money on trials I would like to hear
if anyone knows if, and to what extent, this yellowing can be masked? I wonder if a fluorescent type optical brightener could cope with this or perhaps some other method? A free radical scavenger? a metal oxide to reflect or block the UV?
I don't need transparency in this film, it can be hazy white but not completely opaque and not any other colour.
Supplier of the resin has not been able to suggest anything but they haven't ruled it out either. Any advice will be much appreciated !
regards,
Clann





RE: Yellowing of Polyarylate
RE: Yellowing of Polyarylate
clandestinho- how long in sunshine (I assume) will this film be exposed and where?
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