The Reaction Mechanism for the Organocatalytic Ring-Opening Polymerization ofl-Lactide Using a Guanidine-Based Catalyst: Hydrogen-Bonded or Covalently Bound?

2008 ◽  
Vol 130 (21) ◽  
pp. 6749-6754 ◽  
Author(s):  
Anthony Chuma ◽  
Hans W. Horn ◽  
William C. Swope ◽  
Russell C. Pratt ◽  
Lei Zhang ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Hydrogen Bonded ◽  
Covalently Bound

Latest Research and Developing Tendency of Hyperbranched Polymers Fabrication

2021 ◽  
Vol 896 ◽  
pp. 45-50
Author(s):  
Lian Yi Huo ◽  
Xue Tao Shi ◽  
Si Ming Chen ◽  
Meng Yao Zhang
Keyword(s):  
Reaction Mechanism ◽  
Ring Opening ◽  
Hyperbranched Polymers ◽  
Ring Opening Polymerization ◽  
Synthesis Process ◽  
Future Research ◽  
Advantages And Disadvantages ◽  
Environmental Friendly ◽  
High Efficient ◽  
The Future

Hyperbranched polymers (HBPs) have been applied in various fields because of its outstanding biodegradability and biocompatibility. At present, there are a variety of methods that are used to fabricate HBPs, such as polycondensation, reactive polymerization and ring-opening polymerization according to reaction mechanism. These methods are all environmental-friendly and high-efficient to generate HBPs, and are valuable for industrialization. In this work, we conclude some common methods of HBPs fabrication and make the comparison between them to analyze their advantages and disadvantages, which contribute in how to improve the synthesis process in the future research.

scholarly journals Ring-opening Polymerization Reaction Mechanism of ε-Caprolactone Catalyzed by Bis(dibenzoylmethanato) zirconium(IV) Using PM3 Semi-Empirical Method

2021 ◽  
Vol 1811 (1) ◽  
pp. 012057
Author(s):  
Muhammad Yusuf ◽  
Ahmad Nasir Pulungan ◽  
Rizki Dwi Irmala Sari ◽  
Dinda Prihatini Fitri Amne ◽  
Rahmayani Siregar ◽  
...  
Keyword(s):  
Reaction Mechanism ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Empirical Method ◽  
Polymerization Reaction ◽  
Semi Empirical

Research Progress of Ring-opening Polymerization of ε-caprolactone Initiated by Degradable Biopolymers

2020 ◽  
Vol 24 (13) ◽  
pp. 1507-1516
Author(s):  
Fenghong Li ◽  
Yan Shi ◽  
Pengzhen Li ◽  
Tianci Jiang
Keyword(s):  
Reaction Mechanism ◽  
Polylactic Acid ◽  
Future Development ◽  
Ring Opening ◽  
Preparation Method ◽  
Ring Opening Polymerization ◽  
Research Progress ◽  
Structure Characteristics ◽  
The Future

The article reviews the research progress in the preparation of polycaprolactone through the ring-opening polymerization of ε-caprolactone initiated by biopolymers in recent years. The structure characteristics of starch, cellulose, chitosan, polyhydroxyalkanoates, and polylactic acid, the reaction mechanism, the preparation method, and the application of ε-caprolactone are introduced. Finally, the future development of new polycaprolactone copolymers is prospected.

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
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