How append char data to a std::vector without causing a copy

I have a vector of chars which contains some data elements.

std::vector<unsigned char> data_1;

I have an unsigned char * which is pointing another set of data elements.

unsigned char * data_2;

Question:
Is there a way I can merge data_2 into data_1 which is a vector without causing a copy of the data elements at all?

I read about move semantics being referred in this discussion but I am a bit unsure if it is possible in this situation I have here.