Jazzicatz
I am so sorry (but unfortunately not altogether surprised) that he is still being awful towards you and the children. Such men rarely if ever change and it is not down to you to "fix" or "rescue" him.
Your children do not need such a man around in their lives. Why should they have to see all this crap at such a young age, bad enough at any age. They are taking all this in you know - do not kid yourself that they are not (not suggesting you are btw). You can clear up and make things "normal" again but you cannot yourself solve the underlying problems.
On a wider level what are you both teaching these children about relationships?. Would you actually want them to grow up thinking that smashing up the kitchen in a rage is somehow normal?. Of course not!!. A child's house should be a sanctuary, not a warzone.
You are only responsible for your own self and your children. Not him.
I would agree entirely with the other responses; I think you know what you have to do. Womens Aid would also be able to help you.