Block and star block copolymers by mechanism transformation 9: Preparation and characterization of poly(methyl methacrylate)/poly(1,3-dioxepane)/polystyrene ABC miktoarm star copolymers by combination of reversible addition-fragmentation chain-transfer polymerization and cationic ring-opening polymerization

2003 ◽  
Vol 41 (9) ◽  
pp. 1243-1250 ◽  
Author(s):  
Yu-Gang Li ◽  
Yan-Mei Wang ◽  
Cai-Yuan Pan
Keyword(s):  
Block Copolymers ◽  
Ring Opening ◽  
Chain Transfer ◽  
Ring Opening Polymerization ◽  
Star Copolymers ◽  
Reversible Addition ◽  
Star Block Copolymers ◽  
Cationic Ring Opening Polymerization ◽  
Chain Transfer Polymerization

Synthesis of PCL-PS Star-Block Copolymer by Combination of Lipase-Catalyzed Ring-Opening Polymerization and ATRP

2006 ◽  
Vol 11-12 ◽  
pp. 749-752 ◽  
Author(s):  
Rui Xue Liu ◽  
Yan Shi ◽  
Zhi Feng Fu
Keyword(s):  
Block Copolymer ◽  
Block Copolymers ◽  
Atom Transfer Radical Polymerization ◽  
Radical Polymerization ◽  
1H Nmr ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Star Block Copolymer ◽  
Star Block Copolymers

Poly(ε-caprolactone) (PCL)-polystyrene (PS)star-block copolymer with a cross-linked microgel core were synthesized by the combination of atom transfer radical polymerization (ATRP) of St and lipase-catalyzed ring-opening polymerization (ROP) of ε-CL. The characterization of PCL-Br, PCL-PS-Br macroinitiator and PCL-PS Star-block copolymers was detected by GPC and 1H NMR. Results showed that the target star-block copolymers were successfully prepared.

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