Systhesis of polyester containing p-alkoxycinnamate

Abstract

This work involved the synthesis of three polymers containing UV absorptive chromphore. The first two monomers; 1,2-(bis(4-(2-carboxyvinyl)phenoxy))ethane (M2) and 1,12-(bis(4-(2-carboxyvinyl)phenoxy))dodecane (M12) were synthesized. Condensation polymerization between M2 or M12 and poly(ethylene glycol)200 (PEG200) or poly(ethylene glycol)400 (PEG400) yielded poly(1,2-(bis(4-(2-carboxyviny)phenoxy))ethane)-co-(poly(ethylene glycol)200)), poly((1,2-(bis(4-2-carboxyvinyl)phenoxy))ethane)-co-(poly(ethylene glycol)400)) and poly((1,12-(bis(4-(2-carboxyvinyl) phenoxy))dodecane)-co-(poly(ethylene glycol)400)). The averaged molecular weights of all three polymers were in the range of 2100-2600 Da. Absorption profiles of all synthesized polymers indicated UVB absorption property. The M2-PEG400 copolymer, a yellowish liquid, showed good solubility in various organic solvents. In addition, poly((1,2-(bis(4-(2-carboxyvinyl)phenoxy))ethane)-co-(poly(ethylene glycol)400)) and poly((1,12-(bis(4-(2-carboxyvinyl)phenoxy))dodecane)-co-(poly(ethylene glycol)400)) could be prepared as nano/microparticles with an average size of 500 nm and 3 [micro]m respectively, through solvent displacement technique.