A New Type of Ring-Opening Polymerization

1962 ◽  
Vol 27 (9) ◽  
pp. 3337-3340 ◽  
Author(s):  
Teruaki Mukaiyama ◽  
Tamotsu Fujisawa ◽  
Hiroyuki Nohira ◽  
Teruo Hyugaji
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
New Type

scholarly journals pH-responsive polymeric vesicles from branched copolymers

RSC Advances ◽  
2019 ◽  
Vol 9 (70) ◽  
pp. 41031-41037
Author(s):  
Jinglun Zhou ◽  
Linlin Li ◽  
Weishan Wang ◽  
Yang Zhao ◽  
Shengyu Feng
Keyword(s):  
Glutamic Acid ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Ph Responsive ◽  
Branched Copolymers ◽  
Polymeric Vesicles ◽  
New Type ◽  
Branched Copolymer ◽  
Copolymer Poly

A new type of branched copolymer, poly(l-lactide)2-b-poly(l-glutamic acid), based on polypeptide PLGA is synthesized by the ring-opening polymerization of N-carboxyanhydride of γ-benzyl-l-glutamate with amino-terminated PLLA2–NH2 and subsequent deprotection.

Efficient synthesis and self-assembly of hetero-grafted amphiphilic polypepide bottlebrushes

2012 ◽  
Vol 84 (12) ◽  
pp. 2569-2578 ◽  
Author(s):  
Chunhui Luo ◽  
Chongyi Chen ◽  
Zhibo Li
Keyword(s):  
Self Assembly ◽  
Ring Opening ◽  
Click Reaction ◽  
Ring Opening Polymerization ◽  
The Self ◽  
Molar Ratio ◽  
Efficient Synthesis ◽  
Poly Ethylene Glycol ◽  
New Type ◽  
Poly Ethylene

A new type of hetero-grafted molecular bottlebrush with polypeptide as backbone was synthesized using graft-onto strategy. Poly(γ-propargyl-L-glutamate) (PPLG) as backbone was firstly synthesized via ring-opening polymerization (ROP) of γ-propargyl-L-glutamate (PLG) N-carboxyanhydride (NCA). Next, polystyrene-N3 (PS-N3) and monomethoxy poly(ethylene glycol)-N3 (mPEG-N3) as side chains were grafted onto the PPLG backbone using copper-catalyzed click reaction, which afforded good grafting density and efficiency. Two polypeptide bottlebrushes with PS-to-mPEG molar ratio at 70/30 and 30/70 were prepared. The self-assembly behaviors of these two polypeptide bottlebrushes were investigated using the cosolvent method, and their supramolecular structures were characterized using light scattering (LS) and electron microscopy.

A Recommender System for Inverse Design of Polycarbonates and Polyesters

2020 ◽  
Author(s):  
Nathaniel Park ◽  
Dmitry Yu. Zubarev ◽  
James L. Hedrick ◽  
Vivien Kiyek ◽  
Christiaan Corbet ◽  
...  
Keyword(s):  
Ring Opening ◽  
High Performance ◽  
Recommendation System ◽  
Polymeric Materials ◽  
Monomer Conversion ◽  
Design Strategy ◽  
Ring Opening Polymerization ◽  
Inverse Design ◽  
False Negatives ◽  
Accelerate Development

The convergence of artificial intelligence and machine learning with material science holds significant promise to rapidly accelerate development timelines of new high-performance polymeric materials. Within this context, we report an inverse design strategy for polycarbonate and polyester discovery based on a recommendation system that proposes polymerization experiments that are likely to produce materials with targeted properties. Following recommendations of the system driven by the historical ring-opening polymerization results, we carried out experiments targeting specific ranges of monomer conversion and dispersity of the polymers obtained from cyclic lactones and carbonates. The results of the experiments were in close agreement with the recommendation targets with few false negatives or positives obtained for each class.<br>

Bisurea and Bisthiourea H-Bonding Organocatalysts for Ring-Opening Polymerization: Cues for the Catalyst Design

2019 ◽  
Vol 52 (23) ◽  
pp. 9232-9237 ◽  
Author(s):  
Rukshika S. Hewawasam ◽  
U. L. D. Inush Kalana ◽  
Nayanthara U. Dharmaratne ◽  
Thomas J. Wright ◽  
Timothy J. Bannin ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Catalyst Design

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.

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