Thanks for the quick replies, guys! So it seems it could be done in a case of emergency but is not necessarily recommended.

I actually bought a SRAM 11-spped power-lock which, apparently can be installed without tools. So I could remove a broken link using a chain tool and then use the power-lock the fix the chain on the road, correct? I guess the power-lock is something similar to the master links that HillRider mentions in his post, right?

Are these power-locks and similar meant to be used for a longer time or are they also just an emergency fix to get you home?