I can see the link between time loops and dissociation. In a time loop story the protagonist is involved in an event but in a sense it is less real for him than for other people. He knows its going to happen again and again. This is just one contingent iteration of the event. His emotion is once removed. There is a meta-event - the loop - which is more real to him than the emotional impact of the things happening to him.
In this I think the protagonist of a time-loop story is also a bit like an intuitive person, for whom the meta-event can seem more real than the sensation of the moment. This can lead to an emotional dislocation from other people - you react emotionally at a different time from them. This is obviously different from dissociation because the intuitive person isn't split from their feelings - they just express them at a different point than others. They might get annoyed by the idea of an event, and then be relatively calm when the event actually happens.
This is why I think time travel and time loop stories can appeal to both intuitives and also to dissocated or traumatised individuals. I also include amnesia stories like Memento, which is a reverse of a time loop, but produces the same feeling of dislocation.
