OP, when you say the adapters are breaking, are you saying it's physically breaking like falling apart or do you mean it stops working?
If it's a physical issue, then I'd suggest buying it from a different vendor. Products are shipped and handled by people, there's no telling what kind of trauma the package went through before it gets to its final destination.
However if you're referring to how it stops working, I'd start looking into where it's being plugged into. Some homes/offices have poor quality lines or power that fluctuates way too much in general. It's possible that a standard surge-protector power strip may not be the best solution for you.
For power measurements, I use a simple product called P3 Kill-A-Watt when I suspect power at the outlet isn't very good. You can find it
here.
A big power spike or surge can destroy any AC adapter, Apple-made or not, however there are situations where "sags" where power constantly drops to or below the operating electrical threshold of your device can eventually kill it. For that I'd suggest considering using a UPS like a BACKUPS from APC, however if it's really bad, I'd invest in a SMARTUPS which has circuitry to alter/re-rectify incoming electricity without imposing much on the internal battery. If you are military and use generator power a lot, a power-conditioner is almost mandatory to stabilize the erratic output from being on generator power.
Hope this helps.