Comments on the ring-opening polymerization of morpholine-2,5-dione derivatives by various metal catalysts and characterization of the products formed in the reactions involving R2SnX2, where X = OPriand NMe2and R = Bun, Ph and p-Me2NC6H4

2006 ◽  
pp. 846-851 ◽  
Author(s):  
M. H. Chisholm ◽  
J. Galucci ◽  
C. Krempner ◽  
C. Wiggenhorn
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Metal Catalysts

scholarly journals Synthesis and Characterization of Polyphosphazenes Modified with Hydroxyethyl Methacrylate and Lactic Acid

2013 ◽  
Vol 2013 ◽  
pp. 1-7 ◽  
Author(s):  
Evelyn Carolina Martínez Ceballos ◽  
Ricardo Vera Graziano ◽  
Gonzalo Martínez Barrera ◽  
Oscar Olea Mejía
Keyword(s):  
Lactic Acid ◽  
Ring Opening ◽  
Room Temperature ◽  
Block Structure ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Poly Lactic Acid ◽  
Hydroxyethyl Methacrylate ◽  
H Nmr

Poly(dichlorophosphazene) was prepared by melt ring-opening polymerization of the hexachlorocyclotriphosphazene. Poly[bis(2-hydroxyethyl-methacrylate)-phosphazene] and poly[(2-hydroxyethyl-methacrylate)-graft-poly(lactic-acid)-phosphazene] were obtained by nucleophilic condensation reactions at different concentrations of the substituents. The properties of the synthesized copolymers were assessed by FTIR,1H-NMR and31P-NMR, thermal analysis (DSC-TGA), and electron microscopy (SEM). The copolymers have a block structure and show twoTg's below room temperature. They are stable up to a temperature of 100°C. The type of the substituents attached to the PZ backbone determines the morphology of the polymers.

Synthesis and characterization of Mannich base monophenolate lanthanide complexes and their application in ring-opening polymerization of ε-caprolactone

2016 ◽  
Vol 30 (6) ◽  
pp. 458-464 ◽  
Author(s):  
Ling Peng ◽  
Jing Zhao ◽  
Li-Jun Wang ◽  
Xian Tao ◽  
Yu-Long Wang ◽  
...  
Keyword(s):  
Ring Opening ◽  
Lanthanide Complexes ◽  
Mannich Base ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization

Synthesis and characterization of aluminum complexes based on amino-benzotriazole phenoxide ligand: luminescent properties and catalysis for ring-opening polymerization

2012 ◽  
Vol 26 (10) ◽  
pp. 518-527 ◽  
Author(s):  
Wan-Ju Tai ◽  
Chen-Yu Li ◽  
Pei-Hua Lin ◽  
Jia-Ying Li ◽  
Ming-Jen Chen ◽  
...  
Keyword(s):  
Ring Opening ◽  
Luminescent Properties ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Aluminum Complexes

Synthesis and Characterization of Polydimethylsiloxane (PDMS) with Medium Viscosity via Ring-Opening Polymerization

2021 ◽  
Vol 1028 ◽  
pp. 346-351
Author(s):  
Soni Setiadji ◽  
Zulfi Mofa Agasa ◽  
Diba G Auliya ◽  
Fitrilawati ◽  
Norman Syakir ◽  
...  
Keyword(s):  
Ring Opening ◽  
Vitreoretinal Surgery ◽  
High Viscosity ◽  
Ring Opening Polymerization ◽  
Vitreous Humour ◽  
Synthesis And Characterization ◽  
Low Viscosity ◽  
A Value ◽  
Medium Viscosity

Duration of use and injectability are external factors for Polydimethylsiloxane (PDMS) that needs to be considered when PDMS utilized as a vitreous substituted liquid in vitreoretinal surgery. In general, PDMS which has been used as a substitute for vitreous humour is PDMS with a low viscosity in the value about 1000 cSt and a high viscosity at a value of about 5000 cSt. Various deficiencies have been encountered from low and high viscosity of PDMS, causing research to be continued to obtain PDMS which has suitable properties as a substitute for vitreous humour. One of them is research to obtain medium viscosity of PDMS with a viscosity value of about 2000 cSt. Here, we reported synthesis and characterization of PDMS with medium viscosity in ranges from 1800 to 2600 mPas. PDMS was synthesized through Ring-Opening Polymerization (ROP) pathway using the monomer of Octamethylcyclotetrasiloxane (D4) and the chain terminator of Hexamethyldisiloxane (MM). Various concentrations of potassium hydroxide (KOH) of 3, 4, 6 and 8 %(w/v) were applied as initiator to form gel of PDMS. All synthesized PDMS samples were identified to have viscosity values of 1800-2600 mPas, refractive index values of 1.4042-1.4044 and surface tension values of 22-23 mN/m. Meanwhile, the results of Fourier-Transform Infrared (FTIR) measurement showed that the absorption peaks were similar to that of our previous report.

Synthesizing and characterization of comb-shaped carbazole containing copolymer via combination of ring opening polymerization and nitroxide-mediated polymerization

Polymer ◽  
2010 ◽  
Vol 51 (9) ◽  
pp. 1947-1953 ◽  
Author(s):  
Cheng Chang ◽  
Jian Zhu ◽  
Zhengbiao Zhang ◽  
Nianchen Zhou ◽  
Zhenping Cheng ◽  
...  
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Nitroxide Mediated Polymerization

Physical characterization of poly(?-pentadecalactone) synthesized by lipase-catalyzed ring-opening polymerization

2001 ◽  
Vol 39 (15) ◽  
pp. 1721-1729 ◽  
Author(s):  
Maria Letizia Focarete ◽  
Mariastella Scandola ◽  
Ajay Kumar ◽  
Richard A. Gross
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Physical Characterization

Synthesis and characterization of neutral and cationic aluminum complexes supported by a furfuryl-containing aminophenolate ligand for ring-opening polymerization of ε-caprolactone

2018 ◽  
Vol 42 (11) ◽  
pp. 8374-8383 ◽  
Author(s):  
Jiraya Kiriratnikom ◽  
Sucheewin Chotchatchawankul ◽  
Setsiri Haesuwannakij ◽  
Supavadee Kiatisevi ◽  
Khamphee Phomphrai
Keyword(s):  
Ring Opening ◽  
Ring Opening Polymerization ◽  
Synthesis And Characterization ◽  
Aluminum Complexes

Mononuclear aluminum complexes supported by novel furfuryl-containing aminophenolate ligand are reported along with CL polymerization.

Sign in / Sign up

Export Citation Format

Share Document