scholarly journals Organocatalytic sequential ring-opening polymerization of a cyclic ester and anionic polymerization of a vinyl monomer

2020 ◽  
Vol 56 (58) ◽  
pp. 8067-8070
Author(s):  
Robert Mundil ◽  
Franck Kayser ◽  
Audrey Favrelle-Huret ◽  
Grégory Stoclet ◽  
Philippe Zinck
Keyword(s):  
Block Copolymer ◽  
Anionic Polymerization ◽  
Ring Opening ◽  
Thermoplastic Elastomer ◽  
Ring Opening Polymerization ◽  
Vinyl Monomer ◽  
Cyclic Ester ◽  
First Time

The organocatalytic sequential block polymerization between a cyclic ester and a vinyl monomer is reported for the first time. The new block copolymer self-assembles into nanostructures leading to a thermoplastic elastomer-like material.

Chirality-Induced Catalyst Aggregation: Insights into Catalyst Speciation and Activity Using Chiral Aluminum Catalysts in Cyclic Ester Ring-Opening Polymerization

ACS Catalysis ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 4084-4093
Author(s):  
Sami Gesslbauer ◽  
George Hutchinson ◽  
Andrew J. P. White ◽  
Jordi Burés ◽  
Charles Romain
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Cyclic Ester

One-pot synthesis of PLA-b-PHEA via sequential ROP and RAFT polymerizations

2017 ◽  
Vol 8 (39) ◽  
pp. 6086-6098 ◽  
Author(s):  
Ilknur Yildirim ◽  
Pelin Sungur ◽  
Anna C. Crecelius-Vitz ◽  
Turgay Yildirim ◽  
Diana Kalden ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Ring Opening ◽  
Raft Polymerization ◽  
Ring Opening Polymerization ◽  
One Pot ◽  
One Pot Synthesis

A block copolymer library of polylactide and poly(2-hydroxyethyl acrylate) was prepared via sequential ring opening polymerization and RAFT polymerization in a one-pot approach.

scholarly journals Anionic Polymerization of β-Butyrolactone Initiated with Sodium Phenoxides. The Effect of the Initiator Basicity/Nucleophilicity on the ROP Mechanism

Polymers ◽  
2019 ◽  
Vol 11 (7) ◽  
pp. 1221 ◽  
Author(s):  
Adrian Domiński ◽  
Tomasz Konieczny ◽  
Magdalena Zięba ◽  
Magdalena Klim ◽  
Piotr Kurcok
Keyword(s):  
Anionic Polymerization ◽  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Elimination Reaction ◽  
Mild Conditions ◽  
Acidic Proton ◽  
End Groups ◽  
Anionic Ring

It was shown that selected sodium phenoxide derivatives with different basicity and nucleophilicity, such as sodium p-nitrophenoxide, p-chlorophenoxide, 1-napthoxide, phenoxide and p-methoxyphenoxide, are effective initiators in anionic ring-opening polymerization (AROP) of β-butyrolactone in mild conditions. It was found that phenoxides as initiators in anionic ring-opening polymerization of β-butyrolactone behave as strong nucleophiles, or weak nucleophiles, as well as Brønsted bases. The resulting polyesters possessing hydroxy, phenoxy and crotonate initial groups are formed respectively by the attack of phenoxide anion at (i) C2 followed by an elimination reaction with hydroxide formation, (ii) C4 and (iii) abstraction of acidic proton at C3. The obtained poly(3-hydroxybutyrate) possesses carboxylate growing species. The ratio of the observed initial groups strongly depends on the basicity and nucleophilicity of the sodium phenoxide derivative used as initiator. The proposed mechanism of this polymerization describes the reactions leading to formation of observed end groups. Moreover, the possibility of formation of a crotonate group during the propagation step of this polymerization is also discussed.

Organophosphate-catalyzed bulk ring-opening polymerization as an environmentally benign route leading to block copolyesters, end-functionalized polyesters, and polyester-based polyurethane

2015 ◽  
Vol 6 (24) ◽  
pp. 4374-4384 ◽  
Author(s):  
Tatsuya Saito ◽  
Yusuke Aizawa ◽  
Kenji Tajima ◽  
Takuya Isono ◽  
Toshifumi Satoh
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Cyclic Carbonate ◽  
Environmentally Benign ◽  
Cyclic Ester ◽  
Cyclic Esters

To expand the potential of an organophosphate catalyst, ring-opening polymerization of cyclic esters, cyclic ester-ether, and cyclic carbonate was demonstrated under bulk conditions.

The Study of Thermolplastic Elastomer Based on Polyamide 6: Preparation, Morphology and Mechanical Performance

2011 ◽  
Vol 332-334 ◽  
pp. 1490-1493
Author(s):  
Chun Wang Yi ◽  
Nan Fan Li ◽  
Chao Sheng Wang ◽  
Zhi Han Peng ◽  
Shi Yan Chen
Keyword(s):  
Adipic Acid ◽  
Acid Content ◽  
Ring Opening ◽  
Mechanical Performance ◽  
Thermoplastic Elastomer ◽  
Polyamide 6 ◽  
Ring Opening Polymerization ◽  
Polymerization Process ◽  
End Groups ◽  
Mechanical Performances

In this study,a new thermoplastic elastomer based on polyamid 6, and polytetrahydrofuran was prepared by continuous hydrolytic ring-opening polymerization process. The effective of adipic acid content on the number-average molecular and the content of amino end groups was investigated. The morphology deduce of TPMP, mechanical performances were also investigated.

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