I agree with Sneaks, you should look at examples in your field. My feeling however is that the words "prologue" and "epilogue" do not belong to a thesis, not even one in literature or the arts (I come from the arts). Fact is, these words have a strong connection to "narrative", and I can only recall seeing them in novels or movies or tragedies (if you go back to the original use of the terms). As such they have a strong temporal component: prologue describes facts that happened before the main fact in the novel, epilogue describes facts that happened after it...
now, it's true that you should always create a narrative in every paper or talk or thesis (my sup always tells me that and I always tell this to my students in turn) but what you are writing is not a story, it is..well..an argument I'd say (isn't that what "thesis" stays for?)
so it's not just that academics don't like changes (which is so true!!) but maybe it's also that these words are actually not appropriate for the kind of object a thesis is..
just a thought :-)