Evidence for Ester-Exchange Reactions and Cyclic Oligomer Formation in the Ring-Opening Polymerization of Lactide with Aluminum Complex Initiators

1996 ◽  
Vol 29 (20) ◽  
pp. 6461-6465 ◽  
Author(s):  
Giorgio Montaudo ◽  
Maurizio S. Montaudo ◽  
Concetto Puglisi ◽  
Filippo Samperi ◽  
N. Spassky ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Exchange Reactions ◽  
Aluminum Complex ◽  
Cyclic Oligomer ◽  
Oligomer Formation ◽  
Ester Exchange

Ring-Opening Polymerization of Lactide Using Aluminum Salen-Type Initiators

2014 ◽  
Vol 915-916 ◽  
pp. 713-716
Author(s):  
Qing Zhang ◽  
Jing Tian ◽  
Zhi Qi Cao ◽  
Ru Xia Xu ◽  
Zhen Zhen Sun ◽  
...  
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Infrared Spectroscopy ◽  
Reaction Time ◽  
Magnetic Resonance ◽  
Schiff Bases ◽  
Reaction Temperature ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Resonance Spectroscopy ◽  
Aluminum Complex

In this investigation, Schiff bases aluminum complex was synthesized and used as the initiator in the polymerization of D,L-lactide. The aluminum complex was characterized by infrared spectroscopy (IR), and nuclear magnetic resonance spectroscopy (NMR). The influences of different factors, including reaction time, reaction temperature, and the ratio of D, L-lactide/Al3+ on the synthesis of polylactide were described. The results showed that Schiff bases aluminum complex could be successfully applied in the ring opening polymerization. The optimum condition of the ring opening polymerization of D,L-lactide, which included D,L-lactide/Al3+ (mol/mol) ratio of 250, reaction temperature of 120 °C, and reaction time of 16 hours.

scholarly journals Switchable Ring‐Opening Polymerization by a Ferrocene Supported Aluminum Complex

ChemCatChem ◽  
2019 ◽  
Vol 11 (16) ◽  
pp. 4210-4218 ◽  
Author(s):  
Amy Lai ◽  
Zachary C. Hern ◽  
Paula L. Diaconescu
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Aluminum Complex

Novel triazole-based aluminum complex for ring-opening polymerization of lactones

2011 ◽  
Vol 67 (9) ◽  
pp. 1751-1760 ◽  
Author(s):  
Soňa Hermanová ◽  
Monica M. Moya Cabrera ◽  
Zdeňka Vyroubalová ◽  
Lucy Vojtová
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Aluminum Complex

Ring-opening polymerization of ω-6-hexadecenlactone by a salicylaldiminato aluminum complex: a route to semicrystalline and functional poly(ester)s

2015 ◽  
Vol 6 (10) ◽  
pp. 1727-1740 ◽  
Author(s):  
Tiziana Fuoco ◽  
Angelo Meduri ◽  
Marina Lamberti ◽  
Vincenzo Venditto ◽  
Claudio Pellecchia ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Ring Size ◽  
Aluminum Complex ◽  
Large Ring

The homo and co-polymerization of a large ring size lactone afforded unsaturated poly(esters), further modified to functional thermoplastic materials.

An Aluminum Complex Supported by a Fluorous Diamino-Dialkoxide Ligand for the Highly Productive Ring-Opening Polymerization of ε-Caprolactone

2005 ◽  
Vol 24 (25) ◽  
pp. 6279-6282 ◽  
Author(s):  
Abderramane Amgoune ◽  
Laurent Lavanant ◽  
Christophe M. Thomas ◽  
Yun Chi ◽  
Richard Welter ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Aluminum Complex

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>

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