Synthesis and Characterization of a novel star shaped Rod-Coil Block Copolymer

Transition Metal-Catalyzed Living Radical Polymerization: Toward Perfection in Catalysis and Precision Polymer Synthesis

“…Ring-opening cationic polymerization (ROCP) of ε-caprolactone (εCL), , L-lactide (LLA), , and THF is often combined with metal-catalyzed system for star block copolymers. Star polymers with poly(εCL) or poly(LLA)-based block arms are synthesized by the following three steps: (1) ROCP with a multi-hydroxyl-functional initiator to give hydroxyl-terminal (surface) star polymers, (2) synthesis of multi-haloester-bearing star polymer initiators via the esterification of the terminal hydroxyl groups with acyl halides, and (3) metal-catalyzed living radical polymerization with the initiator. − This pathway efficiently provides star polymers with 3-poly(εCL)- b -poly(FM- 96 ) arms, those with 6-poly(εCL or LLA)- b -poly(MMA or t BA) arms and an iron tris(bipyridine) core, those with 6-poly(LLA)- b -poly(St-ran-FM- 36 ) arms and a triphenylene core, and dendrimer-like triblock (St- b -LLA- b -St) star copolymers …”

Aliphatic polyester polymer stars: synthesis, properties and applications in biomedicine and nanotechnology

“…These copolymers typically form core-shell arrangements and can provide improved hydrophilicity, crystallinity, drug loading and, in the case of amphiphilic polymers, form self-assembled micelles in solution or bulk. 142 TMP-initiated PCL stars were copolymerized with bis (4-methoxyphenyl)oxycarbonylstyrene, 97 while PCL stars with PE cores have been combined with N-(2-hydroxypropyl)methacrylamide, 98 styrene, 101 ethylene glycol, 104 2-ethoxy-2-oxo-1,3,2dioxaphospholane, 105 2-lactobionamido-ethyl methacrylate, 106 gluconamidoethylmethacrylate, 108 and ethylene glycol methacrylate. 109 Control of the length of the blocks had a significant effect on the polymer properties including T m , 101 crystallinity, 108 degradation rate, 105 and micelle size and shape.…”

Electron tomographic analysis of synaptic ultrastructure

“…A number of miktoarm star copolymers, such as A 2 B 2 ,35 ABC36, 37 and A 2 B,38–40 have been synthesized and studied. However, articles published on miktoarm star rod‐coil copolymers are relatively few,41–43 especially, rod‐coil copolymers with π‐conjugated blocks as rod segments.…”