One-pot synthesis of high-molecular-weight aliphatic polycarbonates via melt transesterification of diphenyl carbonate and diols using Zn(OAc)2 as a catalyst

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87311-87319 ◽  
Author(s):  
Ziqing Wang ◽  
Xiangui Yang ◽  
Shaoying Liu ◽  
Jing Hu ◽  
Hua Zhang ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Diphenyl Carbonate ◽  
One Pot ◽  
Satisfactory Yield ◽  
One Pot Synthesis

Aliphatic polycarbonates with Mw greater than 100 000 g mol−1 with satisfactory yield can be synthesized by one-pot melt transesterification of diphenyl carbonate with aliphatic diols at equimolar amounts using Zn(OAc)2 as a catalyst.

One-Pot Synthesis of High Molecular Weight Synthetic Heteroprotein Dimers Driven by Charge Complementarity Electrostatic Interactions

2014 ◽  
Vol 79 (20) ◽  
pp. 9594-9602 ◽  
Author(s):  
David Hvasanov ◽  
Ekaterina V. Nam ◽  
Joshua R. Peterson ◽  
Dithepon Pornsaksit ◽  
Jörg Wiedenmann ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Electrostatic Interactions ◽  
One Pot ◽  
One Pot Synthesis

Catalyzed chain growth polymerisation of ethylene using lanthanidocenes/dialkylmagnesium: further developments and one pot synthesis of narrow dispersed high molecular weight fatty alcohols

2020 ◽  
Vol 10 (20) ◽  
pp. 6809-6824
Author(s):  
T. Chenal ◽  
M. Drelon ◽  
B. Marsh ◽  
F. F. Silva ◽  
M. Visseaux ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Fatty Alcohols ◽  
Chain Growth ◽  
One Pot ◽  
One Pot Synthesis ◽  
Linear Alcohols ◽  
Ethylene Polymerisation

Ethylene polymerisation was performed via an improved in situ Ln/Mg CCG process and applied to the synthesis of high Mn linear alcohols.

One-pot synthesis of hyperstar polymers via sequential ATRP of inimers and functional monomers in aqueous dispersed media

2015 ◽  
Vol 6 (37) ◽  
pp. 6739-6745 ◽  
Author(s):  
Xiaofeng Wang ◽  
Robert W. Graff ◽  
Yi Shi ◽  
Haifeng Gao
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Coupling Reactions ◽  
One Pot ◽  
Functional Monomers ◽  
One Pot Synthesis ◽  
Dispersed Media ◽  
Aqueous Dispersed Media

A one-pot synthesis was reported to produce hyperstar polymers with high molecular weight, low polydispersity and no detectable star coupling reactions.

A synthetic strategy toward isosorbide polycarbonate with a high molecular weight: the effect of intermolecular hydrogen bonding between isosorbide and metal chlorides

2019 ◽  
Vol 10 (24) ◽  
pp. 3380-3389 ◽  
Author(s):  
Ming Zhang ◽  
Wenqin Lai ◽  
Lili Su ◽  
Yu Lin ◽  
Guozhang Wu
Keyword(s):  
Molecular Weight ◽  
Hydrogen Bonding ◽  
High Molecular Weight ◽  
Diphenyl Carbonate ◽  
Intermolecular Hydrogen Bonding ◽  
Polycondensation Reaction ◽  
Metal Chlorides ◽  
Synthetic Strategy

Isosorbide polycarbonate (ISB-PC) was prepared by melt transesterification and polycondensation reaction by employing ISB and diphenyl carbonate (DPC) as monomers.

scholarly journals New 1,2,3-Triazole Containing PolyestersviaClick Step-Growth Polymerization and Nanoparticles Made of Them

2018 ◽  
Vol 2018 ◽  
pp. 1-14 ◽  
Author(s):  
Tengiz Kantaria ◽  
Temur Kantaria ◽  
Giorgi Titvinidze ◽  
Giuli Otinashvili ◽  
Nino Kupatadze ◽  
...  
Keyword(s):  
Molecular Weight ◽  
High Molecular Weight ◽  
Sodium Azide ◽  
Dicarboxylic Acids ◽  
Solution Concentration ◽  
One Pot ◽  
Bromoacetic Acid ◽  
Aliphatic Polyesters ◽  
Step Growth ◽  
Step Growth Polymerization

High-molecular-weight AA-BB-type aliphatic polyesters were synthesizedviaCu(I)-catalyzed click step-growth polymerization (SGP) following a new synthetic strategy. The synthesis was performed between diyne and diazide monomers in an organic solvent as one pot process using three components and two stages. The dipropargyl esters of dicarboxylic acids (component 1) were used as diyne monomers, di-(bromoacetic acid)-alkylene diesters (component 2) were used as precursors of diazide monomers, and sodium azide (component 3) was used for generating diazide monomers. The SGP was carried out in two steps: at Step  1 dibromoacetates interacted with two moles of sodium azide resulting in diazide monomers which interacted in situ with diyne monomers at Step  2 in the presence of Cu(I) catalyst. A systematic study was done for optimizing the multiparameter click SGP in terms of the solvent, duration of both Step  1 and Step  2, solution concentration, catalyst concentration, catalyst and catalyst activator (ligand) nature, catalyst/ligand mole ratio, and temperature of both steps of the click SGP. As a result, high-molecular-weight (MWup to 74 kDa) elastic film-forming click polyesters were obtained. The new polymers were found suitable for fabricating biodegradable nanoparticles, which are promising as drug delivery containers in nanotherapy.

One-Pot Synthesis of Aromatic Polycarbodiimide by in Situ Activation of Diamine

1998 ◽  
Vol 10 (1) ◽  
pp. 51-59
Author(s):  
Amane Mochizuki ◽  
Masahiro Yoshioka ◽  
Michie Sakamoto ◽  
Takahiro Fukuoka ◽  
Mitsuru Ueda
Keyword(s):  
Molecular Weight ◽  
Glass Transition ◽  
Average Molecular Weight ◽  
Aromatic Diamine ◽  
Number Average Molecular Weight ◽  
High Glass Transition Temperature ◽  
One Pot ◽  
One Pot Synthesis ◽  
In Situ Activation

A one-pot synthesis of aromatic polycarbodiimide from aromatic diamine has been developed. This method involves the preparation of carbamate by the reaction of 4, 4′-hexafluoroisopropylidenebis( p-phenyleneoxy)dianiline (6FPA) with phenylchloroformate, followed by the transformation of the carbamate with trimethylsilylchloride-triethylamine to diisocyanate, and then the polycondensation of the resulting diisocyanate in the presence of 3-methyl-1-phenyl-2-phosopholene-1-oxide. The polycarbodiimide (6FPCD) from 6FPA was obtained in quantitative yield having a number average molecular weight up to 5000. The thermal treatment of 6FPCD gave a crosslinkined polymer having a high glass transition temperature up to 200 °C.

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