Good golly what a busy bunch you have been.
You have the Spectra V's Dyneema
pretty close, I must dig up that thingy for you.
Melting points are a bit high. Dyneema
starts turning into a liquid at 150 degrees odd, it won't 'pour off' but starts to lose strength about then. Spectra is just a tad higher.
Vectran's UV isn't that crash hot really but it's abrasion resistance is. I lightly coated my which will help a bit, a better coating would help a lot more but I was in a rush, one of those last minute things you know.
I am in the enviable position of having a boat which is actually called by or Inland Revenue Dept a 'test bed' so I don't pay for my ropes, the company does and it's all R&D. So I can play without the cost most have. I also get many cunning plans which to be honest most are just silly and stupid in the light of day. So the chances I'll come up with another rope
long before the current
ones are past any used by date, are very high.
I'd expect to get many years before it becomes an issue really. The Vectran is not a structural member
of the rope (the Dyneema is) so it's really only stopping chafe.
But it will not be one of those ropes we see that are attached to statements like "It was on the boat when I got it 19 years ago".