An efficient strategy for achieving controlled ring-opening polymerization of O-carboxyanhydrides via amine initiation in collaboration with metal-alkoxide catalysis

2018 ◽  
Vol 9 (40) ◽  
pp. 5014-5023 ◽  
Author(s):  
Yanzhao Nie ◽  
Pei Wang ◽  
Haifeng Du ◽  
Wei Meng ◽  
Jing Yang
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Chain Propagation ◽  
Metal Alkoxide ◽  
Efficient Strategy

Amines and Zn(C6F5)2 for polymerization initiation and functionality transfer from Zn(C6F5)2 to a metal-alkoxide species for promoting chain propagation to achieve well controlled ring-opening polymerization of O-carboxyanhydrides.

Initiation of ring-opening polymerization of lactide: The effect of metal alkoxide catalyst

2012 ◽  
Vol 995 ◽  
pp. 8-16 ◽  
Author(s):  
Diana Cheshmedzhieva ◽  
Iva Angelova ◽  
Sonia Ilieva ◽  
George S. Georgiev ◽  
Boris Galabov
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Metal Alkoxide

Synthesis and characterization of group 4 metal alkoxide complexes containing imine based bis-bidentate ligands: effective catalysts for the ring opening polymerization of lactides, epoxides and polymerization of ethylene

2015 ◽  
Vol 44 (22) ◽  
pp. 10352-10367 ◽  
Author(s):  
Sagnik K. Roymuhury ◽  
Debashis Chakraborty ◽  
Venkatachalam Ramkumar
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Metal Alkoxide ◽  
Bidentate Ligands ◽  
Group 4 ◽  
Group 4 Metal

A series of group 4 complexes containing imine based bis-bidentate ligands were synthesized and used as catalysts for various polymerizations.

Comparison of Metal Alkoxide Initiators in the Ring-Opening Polymerization of Caprolactone

2012 ◽  
Vol 506 ◽  
pp. 142-145 ◽  
Author(s):  
W. Meelua ◽  
V. Bua-Own ◽  
Robert Molloy ◽  
Winita Punyodom
Keyword(s):  
Rate Constant ◽  
Ring Opening ◽  
Order Rate Constant ◽  
Ring Opening Polymerization ◽  
High Conversion ◽  
Metal Alkoxide ◽  
First Order ◽  
Order Rate

Four metal tert-butoxides, namely: aluminum (III) tert-butoxide, Al (Ot-C4H9)3, tin (II) tert-butoxide, Sn (Ot-C4H9)2, titanium (IV) tert-butoxide, Ti (Ot-C4H9)4, and lithium tert-butoxide, Li (Ot-C4H9), were used as initiators in the bulk ring-opening polymerization (ROP) of ε-caprolactone (CL). The polymerizations were carried out at 120 °C for 72 hrs. It was found that the Al (Ot-C4H9)3 only partially dissolved in the CL monomer and gave a low % conversion. The Li (Ot-C4H9) initiator did not dissolve and gave no polymerization. In contrast, the Sn (Ot-C4H9)2 initiator dissolved completely, albeit very slowly, and gave a high % conversion. The Ti (Ot-C4H9)4 initiator was by far the easiest and quickest to dissolve and also gave a high % conversion. Consequently, Ti (Ot-C4H9)4-initiated polymerization was studied further by dilatometry at 120°C. From the kinetic results, a first-order rate constant, kp, of 0.120 l mol-1 min-1 was obtained.

A new, simple, and efficient strategy for the preparation of active antifungal biodegradable materials via ring-opening polymerization of l-lactide with zinc aryloxides

2019 ◽  
Vol 48 (23) ◽  
pp. 8193-8208 ◽  
Author(s):  
Rafał Petrus ◽  
Piotr Sobota
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Biodegradable Materials ◽  
Efficient Strategy

Zinc aryloxides supported by phenylphenolato ligands were used for the development of active antifungal biodegradable materials via ring-opening polymerization of l-lactide.

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