Synthesis PLA/PEG copolymer from Lactide with Ethylene Glycol

doolue

What is the popular applications of this copolymer (PLA/PEG)
If you can supply some information about synthesis of PLA/PEG copolymer. I mean what elements that we can study (thermal reaction, initiator, catalyst..) . And what method to analyst copolymer's molecular weight, distribution weight,...viscosity...
Can you share to me the document of the ASTM for mesuring viscosity?
Thanks a lot.