Control of properties of PLA-PFPE-PLA triblock copolymers using stereocomplex between l-LA and d-LA sequences

作者：Lee Hak Yong; Kim Yeong Woo; Park Chan Young; Lee Chang Han; Kim Seong Soo; Lee Won Ki^*

来源：Molecular Crystals and Liquid Crystals, 2016, 636(1): 128-133.

DOI：10.1080/15421406.2016.1201394

• poly(l-lactide)
• poly(d-lactide)
• stereocomplex
• perfluoro polyether
• biodegradation

Two type of triblock copolymers [poly(l-lactide)-b-perfluoro polyether-b-poly(l-lactide) (fluoro l-PLA) and poly(d-lactide)-b-perfluoro polyether-b-poly(d-lactide) (fluoro d-PLA)] (fluoro PLAs) were synthesized by ring-opening polymerization. The synthesized triblock copolymers showed more hydrophobic properties than pristine l-PLA due to the perfluoro polyether (PFPE). To control the surface properties, the blends were prepared by mixing fluoro PLAs with l-PLA. The degradation rates of the fluoro PLAs/l-PLA blends were retarded due to the surface segregation of PFPE which has lower surface energy. In case of the fluoro d-PLA/l-PLA blends, however, the stereocomplex formation between the l-lactide and d-lactide sequences enhanced the thermal and enzymatic stabilities of l-PLA. As a result, the biodegradability of l-PLA can be controlled by copolymerization or the formation of a stereocomplex.

• 出版日期2016