scholarly journals Versatile Preparation of Branched Polylactides by Low-Temperature, Organocatalytic Ring-Opening Polymerization in N-Methylpyrrolidone and Their Surface Degradation Behavior

2021 ◽  
Author(s):  
Giulia Scoponi ◽  
Nora Francini ◽  
Veronica Paradiso ◽  
Roberto Donno ◽  
Arianna Gennari ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Degradation Behavior ◽  
Surface Degradation

Low Temperature Ring-Opening Polymerization of Diglycolide Using Organocatalysts with PEG as Macroinitiator

2016 ◽  
Vol 217 (7) ◽  
pp. 842-849 ◽  
Author(s):  
Viviane Mawamba Kemo ◽  
Christian Schmidt ◽  
Yufei Zhang ◽  
Sabine Beuermann
Keyword(s):  
Low Temperature ◽  
Ring Opening ◽  
Ring Opening Polymerization

Near-to-eutectic mixtures as bifunctional catalysts in the low-temperature-ring-opening-polymerization of ε-caprolactone

2015 ◽  
Vol 17 (6) ◽  
pp. 3632-3643 ◽  
Author(s):  
Sara García-Argüelles ◽  
Carolina García ◽  
María C. Serrano ◽  
María C. Gutiérrez ◽  
M. Luisa Ferrer ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ring Opening ◽  
Methanesulfonic Acid ◽  
Ring Opening Polymerization ◽  
Bifunctional Catalysts ◽  
Eutectic Mixtures

We have investigated the ring-opening polymerization (ROP) of ε-caprolactone using mixtures of methanesulfonic acid and the guanidine 1,5,7-triazabicyclo[4.4.0]dec-5-ene as the catalyst.

scholarly journals Review on the Accelerated and Low-Temperature Polymerization of Benzoxazine Resins: Addition Polymerizable Sustainable Polymers

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1260
Author(s):  
Bimlesh Lochab ◽  
Monisha Monisha ◽  
Nagarjuna Amarnath ◽  
Pratibha Sharma ◽  
Sourav Mukherjee ◽  
...  
Keyword(s):  
Low Temperature ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
The Third ◽  
Current Review ◽  
Ring Opening Reactions ◽  
Evolution Of Structure ◽  
Areas Of Interest

Due to their outstanding and versatile properties, polybenzoxazines have quickly occupied a great niche of applications. Developing the ability to polymerize benzoxazine resin at lower temperatures than the current capability is essential in taking advantage of these exceptional properties and remains to be most challenging subject in the field. The current review is classified into several parts to achieve this goal. In this review, fundamentals on the synthesis and evolution of structure, which led to classification of PBz in different generations, are discussed. Classifications of PBzs are defined depending on building block as well as how structure is evolved and property obtained. Progress on the utility of biobased feedstocks from various bio-/waste-mass is also discussed and compared, wherever possible. The second part of review discusses the probable polymerization mechanism proposed for the ring-opening reactions. This is complementary to the third section, where the effect of catalysts/initiators has on triggering polymerization at low temperature is discussed extensively. The role of additional functionalities in influencing the temperature of polymerization is also discussed. There has been a shift in paradigm beyond the lowering of ring-opening polymerization (ROP) temperature and other areas of interest, such as adaptation of molecular functionality with simultaneous improvement of properties.

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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