scholarly journals Recent Advances in Externally Controlled Catalysis for Ring-opening Polymerisation

2022 ◽  
Author(s):  
Sandeep Kaler ◽  
Matthew Jones
Keyword(s):  
Ring Opening ◽  
On Demand ◽  
Recent Advances ◽  
Polymer Architectures

Switchable catalysis is a powerful tool in the polymer chemist’s toolbox as it allows on demand access to a variety of polymer architectures. Switchable catalysts operate by the generation of...

scholarly journals Recent advances in ring-opening metathesis polymerization, and application to synthesis of functional materials

2010 ◽  
Vol 42 (12) ◽  
pp. 905-915 ◽  
Author(s):  
Sutthira Sutthasupa ◽  
Masashi Shiotsuki ◽  
Fumio Sanda
Keyword(s):  
Ring Opening ◽  
Functional Materials ◽  
Ring Opening Metathesis Polymerization ◽  
Metathesis Polymerization ◽  
Recent Advances

scholarly journals Controlled Ring-Opening Polymerization of O-Carboxyanhydrides to Synthesize Functionalized Poly(α-Hydroxy Acids)

2021 ◽  
Vol 03 (01) ◽  
pp. 041-050
Author(s):  
Xiaoqian Wang ◽  
Ai Lin Chin ◽  
Rong Tong
Keyword(s):  
Biomedical Engineering ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Metal Catalyst ◽  
Hydroxy Acids ◽  
Controlled Polymerization ◽  
Biodegradable Polyesters ◽  
Recent Advances

Poly(α-hydroxy acids), as a family of biodegradable polyesters, are valuable materials due to their broad applications in packaging, agriculture, and biomedical engineering. Herein we highlight and explore recent advances of catalysts in controlled ring-opening polymerization of O-carboxyanhydrides towards functionalized poly(α-hydroxy acids), especially metal catalyst-mediated controlled polymerization. Limitations of current polymerization strategies of O-carboxyanhydrides are discussed.

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.

Biological applications of water-soluble polypeptides with ordered secondary structures

2020 ◽  
Vol 8 (31) ◽  
pp. 6530-6547 ◽  
Author(s):  
Chenglong Ge ◽  
Huan Ye ◽  
Fan Wu ◽  
Junliang Zhu ◽  
Ziyuan Song ◽  
...  
Keyword(s):  
Ring Opening ◽  
Secondary Structures ◽  
Ring Opening Polymerization ◽  
Water Soluble ◽  
Biological Applications ◽  
Recent Advances

Herein, recent advances in the synthesis of the water-soluble polypeptides with ordered secondary structures via ring-opening polymerization of NCA/NTA and their biological applications are described.

scholarly journals Synthesis of Biodegradable Polymers: A Review on the Use of Schiff-Base Metal Complexes as Catalysts for the Ring Opening Polymerization (ROP) of Cyclic Esters

Catalysts ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 800 ◽  
Author(s):  
Orlando Santoro ◽  
Xin Zhang ◽  
Carl Redshaw
Keyword(s):  
Schiff Base ◽  
Metal Complexes ◽  
Base Metal ◽  
Biodegradable Polymers ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Polymerization Process ◽  
Cyclic Esters ◽  
Recent Advances ◽  
Schiff Base Metal Complexes

This review describes the recent advances (from 2008 onwards) in the use of Schiff-base metal complexes as catalysts for the ring opening polymerization (ROP) of cyclic esters. The synthesis and structure of the metal complexes, as well as all aspects concerning the polymerization process and the characteristics of the polymers formed, will be discussed.

Recent Advances in the Chemistry of 2-Acylaziridines

Synthesis ◽  
2017 ◽  
Vol 49 (23) ◽  
pp. 5093-5104 ◽  
Author(s):  
Alena Pankova ◽  
Mikhail Kuznetsov
Keyword(s):  
Carbonyl Group ◽  
Ring Opening ◽  
Bond Cleavage ◽  
Aziridine Ring ◽  
Reaction Selectivity ◽  
Recent Advances ◽  
Nitrogen Containing Compounds

This review highlights recent achievements in the transformations of 2-acylaziridines toward the synthesis of cyclic and acyclic nitrogen-containing compounds. The influence of a carbonyl group on reaction selectivity is discussed.1 Introduction2 Reactions via C–C Bond Cleavage3 Reactions via C–N Bond Cleavage3.1 Reactions Starting with the Aziridine Ring Opening3.2 Reactions Starting at the Carbonyl Group4 Conclusion

Recent Advances in Free-Radical Ring-Opening Polymerization

1988 ◽  
Vol 25 (5-7) ◽  
pp. 781-798 ◽  
Author(s):  
William J. Bailey ◽  
Jason L. Chou ◽  
Pin-Zhen Feng ◽  
Bahram Issari ◽  
Vijaya Kuruganti ◽  
...  
Keyword(s):  
Free Radical ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Radical Ring ◽  
Recent Advances

scholarly journals Recent Developments in Ring-Opening Copolymerization of Epoxides With CO2 and Cyclic Anhydrides for Biomedical Applications

2021 ◽  
Vol 9 ◽  
Author(s):  
Xue Liang ◽  
Fei Tan ◽  
Yunqing Zhu
Keyword(s):  
Ring Opening ◽  
Biomedical Applications ◽  
Organometallic Complexes ◽  
Controlled Polymerization ◽  
Catalyst Development ◽  
Metal Free ◽  
Narrow Scope ◽  
Recent Advances ◽  
The Future ◽  
Recent Developments

The biomedical applications of polyesters and polycarbonates are of interest due to their potential biocompatibility and biodegradability. Confined by the narrow scope of monomers and the lack of controlled polymerization routes, the biomedical-related applications of polyesters and polycarbonates remain challenging. To address this challenge, ring-opening copolymerization (ROCOP) has been exploited to prepare new alternating polyesters and polycarbonates, which would be hard to synthesize using other controlled polymerization methods. This review highlights recent advances in catalyst development, including the emerging dinuclear organometallic complexes and metal-free Lewis pair systems. The post-polymerization modification methods involved in tailoring the biomedical functions of resultant polyesters and polycarbonates are summarized. Pioneering attempts for the biomedical applications of ROCOP polyesters and polycarbonates are presented, and the future opportunities and challenges are also highlighted.

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