It's easy as peanuts to make any kind of explosives. The elements we already have for explosions are trivial, they just use normal fire and pressure generation to make explosions, in the same way exploding steam does.

...More "realistic" explosions aren't likely to happen anytime soon though, more because the developers can't be arsed to, and because the result wouldn't be nearly as exciting as it sounds. You have to remember that the scale of objects in TPT is entirely arbitrary, there are no units of weight or size, so "realism" in explosions is entirely laughable.

The game devs aren't ignoring the whole community out of spite, Videogamer555. Sorry if it seems that way. There's a reason we have a whole game mods subforum.

*edit: Also, powered breakable clone has been on the table for a while now. I think the only reason it was never added was because it only has a very select few uses, and seems horribly redundant to have four clone elements.