Synthesis of Novel Polyether Polyol by Using Double Metal Cyanide

Gu, Yi; Dong, Xu; Sun, Daolai

doi:10.1080/10601325.2012.687968

Cited by 10 publications

(6 citation statements)

References 24 publications

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“…At higher EO fractions (>78%), turbid solutions were observed, caused by the crystallization of long PEO homopolymer fractions. In 2012, Sun et al reported the homopolymerization of epichlorohydrin (ECH) with tri-(2-hydroxyethyl) isocyanurate as an initiator, followed by the use of PECH as chain extender for PU elastomers . Recently, the homopolymerization of racemic ECH, S -ECH, and R -ECH was reinvestigated by Zhang et al Regioregular PECH was obtained with a head-to-tail content exceeding 99%, molecular weights ranging from 900 to 2700 g/mol and PDIs of 1.42 to 1.72.…”

Section: Polymerization Of Alkylene Oxides: Methodsmentioning

confidence: 99%

Polymerization of Ethylene Oxide, Propylene Oxide, and Other Alkylene Oxides: Synthesis, Novel Polymer Architectures, and Bioconjugation

et al. 2015

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The review summarizes current trends and developments in the polymerization of alkylene oxides in the last two decades since 1995, with a particular focus on the most important epoxide monomers ethylene oxide (EO), propylene oxide (PO), and butylene oxide (BO). Classical synthetic pathways, i.e., anionic polymerization, coordination polymerization, and cationic polymerization of epoxides (oxiranes), are briefly reviewed. The main focus of the review lies on more recent and in some cases metal-free methods for epoxide polymerization, i.e., the activated monomer strategy, the use of organocatalysts, such as N-heterocyclic carbenes (NHCs) and N-heterocyclic olefins (NHOs) as well as phosphazene bases. In addition, the commercially relevant double-metal cyanide (DMC) catalyst systems are discussed. Besides the synthetic progress, new types of multifunctional linear PEG (mf-PEG) and PPO structures accessible by copolymerization of EO or PO with functional epoxide comonomers are presented as well as complex branched, hyperbranched, and dendrimer like polyethers. Amphiphilic block copolymers based on PEO and PPO (Poloxamers and Pluronics) and advances in the area of PEGylation as the most important bioconjugation strategy are also summarized. With the ever growing toolbox for epoxide polymerization, a "polyether universe" may be envisaged that in its structural diversity parallels the immense variety of structural options available for polymers based on vinyl monomers with a purely carbon-based backbone.

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Section: Polymerization Of Alkylene Oxides: Methodsmentioning

confidence: 99%

Polymerization of Ethylene Oxide, Propylene Oxide, and Other Alkylene Oxides: Synthesis, Novel Polymer Architectures, and Bioconjugation

et al. 2015

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“…In 2012, Gu et al polymerized ECH with DMC catalysts using an isocyanate as an initiator to make a polyurethane elastomer. 53 In 2014, Wei et al prepared regioregular PECH with controlled molecular weights up to 4.2 kg/mol with Đ > 1.4 using DMC catalysts. 36 By using racemic mixtures or enantiopure ECH, the authors were able to make thermoplastic or semi-crystalline PECH, respectively.…”

Section: Double Metal Cyanide Catalystsmentioning

confidence: 99%

The versatile, functional polyether, polyepichlorohydrin: History, synthesis, and applications

Shukla

Ferrier

2021

Journal of Polymer Science

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Polyepichlorohydrin (PECH) is a functional polyether first synthesized in the 1950's by the catalytic ring opening polymerization of epichlorohydrin (ECH), its inexpensive epoxide pre-cursor. PECH elastomers are used in diverse commercial applications due to their unique combination of properties including low temperature flexibility and heat and oil resistance. PECH holds an interesting place in polymer history as its synthesis led to the discovery of highly effective aluminum-based catalysts for epoxide polymerizations and a new class of high molecular weight polyether elastomers by an exceptional polymer chemist, Edwin J. Vandenberg. ECH is an ideal feedstock for polymer materials as it is functional, inexpensive, and produced through environmentally friendly means. However, due to the alkyl chloride pendant, polymerizations involving ECH are difficult and limited synthetic advancement has occurred until very recently. This focused review will discuss modern polymerization methods involving ECH while giving a historical perspective on the evolution of these techniques. We will also review applications of ECH-based polymers and discuss the future development of these materials. We hope to convince the reader to explore ECH-based materials in their own work.

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“…Elemental analyses were performed by using an ICP-AES instrument (Leeman Labs) and a Vario MACRO instrument (Elementar). 1 H NMR and 13 C NMR spectra of the products were obtained on a Bruker Advance DMX 400 MHz and 125 MHz spectrometer with TMS as internal reference respectively. Average-number molecular weight (M n ) and molecular weight distribution (M w /M n ) were determined by using a PL-GPC 220 chromatograph (Polymer Laboratories Ltd.) equipped with an HP 1100 pump from Agilent Technologies.…”

Section: Characterizationmentioning

confidence: 99%

“…Due to the chloromethyl and two terminated hydroxyl groups, polyepichlorohydrin [poly(ECH)] diol is widely used as a precursor for making functionalized polymers. The terminated hydroxyls could react with di-or tri-isocyanates to give linear or cross-linked polyurethane materials, 1 while the nucleophilic substitution of -Cl by azide (-N 3 ) would result in the formation of glycidylazide polymer, which could be used as an energetic binder. 2 For most of the disclosed catalysts, like Lewis acids of BF 3 etherate, 3 SnCl 4 , 4 or SbCl 5 , 5 inorganic acid of sulfuric acid, 6 trialkyl oxonium salt of triethyloxonium tetrauoroborate, 7 and super acid esters of CF 3 SO 3 R or FSO 3 R, 8 generally, a protic compound co-initiator is essentially required.…”

Section: Introductionmentioning

confidence: 99%

Regio-selective synthesis of polyepichlorohydrin diol using Zn–Co(iii) double metal cyanide complex

Wei

Zhang

et al. 2014

RSC Adv.

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Synthesis of Novel Polyether Polyol by Using Double Metal Cyanide

Cited by 10 publications

References 24 publications

Polymerization of Ethylene Oxide, Propylene Oxide, and Other Alkylene Oxides: Synthesis, Novel Polymer Architectures, and Bioconjugation

Polymerization of Ethylene Oxide, Propylene Oxide, and Other Alkylene Oxides: Synthesis, Novel Polymer Architectures, and Bioconjugation

The versatile, functional polyether, polyepichlorohydrin: History, synthesis, and applications

Regio-selective synthesis of polyepichlorohydrin diol using Zn–Co(iii) double metal cyanide complex

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