4. Conclusions
To date, this one-pot two-stage reaction method for the synthesis of PLA macromonomers via the direct polycondensation of LA seems to be the simplest and probably cheapest method of synthesis. Further, a lack of metal catalyst is desirable for certain types of polymer application. It was also demonstrated that graft and comb polymers can be prepared using these macromonomers. The starting LA is a typical renewable feedstock. Thus, this study provides benefits for conducting ‘green polymer chemistry’.