TY - JOUR
T1 - N-heterocyclic carbenes as organocatalysts in controlled/living ring-opening polymerization of O-carboxyanhydrides derived from l -lactic acid and l -mandelic acid
AU - Xia, Haidong
AU - Kan, Suli
AU - Li, Zhenjiang
AU - Chen, Jia
AU - Cui, Saide
AU - Wu, Wenzhuo
AU - Ouyang, Pingkai
AU - Guo, Kai
PY - 2014/8/15
Y1 - 2014/8/15
N2 - An organocatalytic approach to controlled/living ring-opening polymerizations (ROPs) of O-carboxyanhydrides (OCAs) using N-heterocyclic carbenes (NHCs) as nucleophilic catalysts has been investigated. NHCs with different structures were used in order to compare the catalytic performances in the ROP of OCA of l-lactic acid. 1H NMR, SEC, and MALDI-TOF MS measurements of the products clearly indicated a controlled/living manner of the polymerization. The controlled/living nature was further confirmed by kinetic and chain extension experiments. Additionally, polylol initiators were used to produce α,ω-dihydroxy telechelic, 3-, and 4-armed star-shaped polymers. Moreover, star-shaped diblock copolymer, bearing methyl and phenyl side groups, has been successfully synthesized with OCA/NHC system.
AB - An organocatalytic approach to controlled/living ring-opening polymerizations (ROPs) of O-carboxyanhydrides (OCAs) using N-heterocyclic carbenes (NHCs) as nucleophilic catalysts has been investigated. NHCs with different structures were used in order to compare the catalytic performances in the ROP of OCA of l-lactic acid. 1H NMR, SEC, and MALDI-TOF MS measurements of the products clearly indicated a controlled/living manner of the polymerization. The controlled/living nature was further confirmed by kinetic and chain extension experiments. Additionally, polylol initiators were used to produce α,ω-dihydroxy telechelic, 3-, and 4-armed star-shaped polymers. Moreover, star-shaped diblock copolymer, bearing methyl and phenyl side groups, has been successfully synthesized with OCA/NHC system.
KW - N-heterocyclic carbene
KW - living polymerization
KW - ring-opening polymerization
UR - http://www.scopus.com/inward/record.url?scp=84903835024&partnerID=8YFLogxK
U2 - 10.1002/pola.27241
DO - 10.1002/pola.27241
M3 - 文章
AN - SCOPUS:84903835024
SN - 0887-624X
VL - 52
SP - 2306
EP - 2315
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
IS - 16
ER -