Synthesis of well-defined ABC2, AB2C3, (ABC2)4, and (ABC2)6 miktoarm star-branched polymers by combining organocatalyzed group transfer polymerization and ring-opening polymerization using Multialdehydes as chain linkers

Polymer ◽  
2021 ◽  
pp. 124130
Author(s):  
Yuansheng Ding ◽  
Jian Li ◽  
Yujian Liu ◽  
Qun Jia ◽  
Yougen Chen
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Branched Polymers ◽  
Group Transfer ◽  
Miktoarm Star

TiCp2Cl-Catalyzed Living Radical and Ring Opening Polymerizations Initiated from Epoxides and Aldehydes in the Synthesis of Linear, Graft and Branched Polymers

2004 ◽  
Vol 856 ◽  
Author(s):  
Alexandru D. Asandei ◽  
Isaac W. Moran ◽  
Gobinda Saha ◽  
Yanhui Chen
Keyword(s):  
Electron Transfer ◽  
Ring Opening ◽  
Glycidyl Methacrylate ◽  
Ring Opening Polymerization ◽  
Branched Polymers ◽  
Single Electron Transfer ◽  
Radical Ring ◽  
Polymer Architectures ◽  
Complex Polymer

ABSTRACTTi(III)Cp2Cl-catalyzed radical ring opening (RRO) of epoxides or single electron transfer (SET) reduction of aldehydes generates Ti alkoxides and carbon centered radicals which add to styrene, initiating a radical polymerization. This polymerization is mediate in a living fashion by the reversible termination of growing chains with the TiCp2Cl metalloradical. In addition, polymers or monomers containing pendant epoxide groups (glycidyl methacrylate) can be used as substrates for radical grafting or branching reactions by self condensing vinyl polymerization. In addition, Ti alkoxides generated in situ by both epoxide RRO and aldehyde SET initiate the living ring opening polymerization of ε-caprolactone. Thus, new initiators and catalysts are introduced for the synthesis of complex polymer architectures.

Branched polymers by cationic ring-opening polymerization

1993 ◽  
Vol 73 (1) ◽  
pp. 77-89 ◽  
Author(s):  
E.J. Goethals ◽  
G.G. Trossaert ◽  
P.J. Hartmann ◽  
K. Engelen
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Branched Polymers ◽  
Cationic Ring Opening Polymerization

Synthesis of miktoarm star-shaped and inverse star-block copolymers by a combination of ring-opening polymerization and click chemistry

e-Polymers ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 559-568 ◽  
Author(s):  
Xiaoqi Yan ◽  
Jianbo Li ◽  
Tianbin Ren
Keyword(s):  
Block Copolymer ◽  
Ring Opening ◽  
Click Reaction ◽  
Ring Opening Polymerization ◽  
Structure And Properties ◽  
Star Block Copolymer ◽  
Ft Ir ◽  
Miktoarm Star ◽  
Star Block Copolymers ◽  
Ft Ir Spectroscopy

AbstractBased on the combination of the “arm-first” and “core-first” strategies, the miktoarm star-shaped copolymer PLLA2PCL2 and the inverse star-block copolymer (PCL-b-PLLA)2-core-(PCL-b-PLLA)2 were designed and synthesized by the combination of ring-opening polymerization (ROP) and a click reaction. The miktoarm star-shaped copolymer PLLA2PCL2 was synthesized by a click reaction of an azido macroinitiator PLLA2(N3)2 and HC≡C-PCL. The inverse star-block copolymer (PCL-b-PLLA)2-core-(PCL-b-PLLA)2 was synthesized by a click reaction of an azido macroinitiator (PCL-b-PLLA)2(N3)2 and HC≡C-PCL-b-PLLA. The structures of these star polymers were confirmed by nuclear magnetic resonance (NMR), Fourier-transform infrared (FT-IR) spectroscopy and gel permeation chromatograph (GPC). The inverse star-block copolymer could be used to study the potential relationship between polymer structure and properties, which has a unique structure and good crystallization properties.

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