Linear Polyurethanes from Polyalkylene Ether Glycols

Murbach, Walter; Adicoff, Arnold

doi:10.1021/ie50609a027

Cited by 45 publications

(11 citation statements)

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“…This report extends copolymerization results of DOL with some cyclic ethers, such as tetrahydrofuran (THF), 3,3-bis(chloromethyl)oxacyclobutane (BCMO), and 4-chloromethyl-1, 3…”

Section: Introductionsupporting

confidence: 75%

Cationic copolymerization of 1,3‐dioxolane with some cyclic ethers

et al. 1965

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Copolymerization of 1,3-dioxolane with tetrahydrofuran, 3,3-bis(chloromethyl)oxacyclobutane, and 4-chloromethyl-1,3-dioxolane were performed using boron fluoride etherate as catalyst. The monomer reactivity ratios a t 0 "C. were determined. The plot of log 1 /r, vs.pKb of each monomer gave a straight line, which suggests that basicity of cyclic ethers may be important in determining monomer reactivity ratios in their cationic copolymerization. ZUSAMMENFASSUNG:Die Copolymerisationen van 1,3-Dioxolan mit Tetrahydrofuran, 3,3-Bischlormethyloxetan und 4-Chlormethyl-l,3-Dioxolan wtuden rnit Borfluoridatherat als Katalysator durchgefiihrt. Die Copolymerisationsparameter bei 0 "C wurden bestimmt. Die Auftragung 1 /rl gegen pKb eines jeden Monomeren ergab eine Gerade, was darauf schlieoen laRt, da13 die Basizitat bei der Bestimmung der Copolymerisationsparameter der kationischen Polymerisation wichtig ist.

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“…This report extends copolymerization results of DOL with some cyclic ethers, such as tetrahydrofuran (THF), 3,3-bis(chloromethyl)oxacyclobutane (BCMO), and 4-chloromethyl-1, 3…”

Section: Introductionsupporting

confidence: 75%

Cationic copolymerization of 1,3‐dioxolane with some cyclic ethers

et al. 1965

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“…Random copolymers of various alkylene oxides and copolymers of tetrahydrofuran and alkylene oxides can also be used (99). Hydroxyl-terminated polythioethers can be employed where oil resistance and low-temperature flexibility are required.…”

Section: Propylene Oxide To Diol or Polyol Initiators Leads Primarilymentioning

confidence: 99%

Urethane Coatings

Frisch

KORDOMENOS

1985

ACS Symposium Series

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“…Copolymerization reactions of alkylene oxides and tetrahydrofuran with boron fluoride ethyl ether as catalyst have been investigated by a number of groups (1)(2)(3)(4) ; no work, however, has been reported on the kinetics of the copolymerization reaction of tetrahydrofuran with propylene oxide. Copolyetherdiols obtained froill the copolymerizatioil of allcylene oxides and tetrahydrofuran have been used in the preparation of poIyurethanes (1,3).…”

Section: Introductionmentioning

confidence: 99%

“…Copolyetherdiols obtained froill the copolymerizatioil of allcylene oxides and tetrahydrofuran have been used in the preparation of poIyurethanes (1,3). I t has been reported (I) that diols prepared from tetrahydrofuran and propyleile oxide present two advantages when used as intermediates in the preparation of polyurethanes.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Aspects of the Copolymerization of Tetrahydrofuran With Propylene Oxide. I

Blanchard¹,

Singh²,

Baijal³

1966

Can. J. Chem.

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-4 B S T RA C T 'I'etrahydrofuran and propylene oxide were copolymerized in the presence of the catalyst boron fluoride ethyl ether, and various co-catalysts, such as 1,2-propanediol, 1,3-propanediol, and 1,4-butanediol. Ethylene chloride was used as a solvent and a s an internal reference for analytical purposes. Reactions were carried out a t 0 OC and a t atmospheric pressure. Monomer concentrations were determined by vapor phase chromatography, and copolymer ~nolecular structure analyses were carried out by physical and chemical methods including infrared spectroscopy, vapor pressure osmometry, hydroxyl end-group analysis, and chemical reduction of unsaturated linlcages.The ho~l~opolymerizatio~~ of tetrahydrofuran did not take place, whereas that of propylene oxide proceeded a t a rapid rate. In the copolymerization of tetrahydrofuran with propylene oxide, the rate of disappearance of tetrahydrofuran was found to be independent of its concentration, but varied d~rectly with the concentration of propylene oxide. Under similar conditions, the rate of disappearance of propylene oxide was found to be ( a ) proportio~lal to the square of its concentration, and (b) inversely proportional to the concentration of tetrahydrofuran.Reactivity ratios varied between 1.3 and 1.8 for propylene oxide and between 0.1 and 0.6 for tetrahydrofuran. Molecular weights obtained by vapor pressure osmometry ranged between 460 and 740, and those obtained by hydroxyl end-group analysis ranged between 520 and 1 660. Infrared spectra confirmed the presence of hydroxyl groups and ether linkages in the copolylners preparecl. liesults 011 terminal unsaturation were negative. RESUMJ?La copolymCrisation du tCtrahydrofural1 et de l'oxyde de propylbne fut effectuee en pr6sence clu catalyseur 1'CthCrate du fluorure de bore, et de cocatalyseurs tels le 1,2-propanediol, le 1,3-propanediol e t le 1,4butanediol. Le chlorure d1Cthylblle servait de solvant e t d'6talon interne pour fins d'analyse. Les concelltrations de monombres furent suivies, en fonction du temps, par la chromatographie en phase vapeur. L'analyse des copolymPres a port6 surtout sur l'btude de la structure au moyen de techniques physiques e t chimiques telles que la spectroscopie infrarouge, 110smom6trie B tension de vapeur, l'analyse chimique des groupements hydroxyles ter~ninaux e t la rCduction chimique des liaisons doubles.L'homopolymCrisation du tetrahydrofuran n'a pu @tre effectube, tandis qu'avec l'oxyde de propylhne seul, dans les conditions de rCaction adoptees, la rCaction s'est poursuivie B grande vitesse. Dans la copolymCrisation du tCtrahydrofuran avec l'oxyde de propylbne, la vitesse de disparition du tetrahydrofuran 6tait indCpendante de sa col~centratioll e t variait directement avec la concentration d'oxyde de propylbne. Dans les m@mes conditions, la vitesse de disparition de l'oxyde cle propylbne Ctait ( a ) proportionnelle au carre de sa concentratio11 e t (b) lnversement proportionnelle B la concentration du tbtrahydrofuran.Les rapports de rCactivit6 de l'oxyde d...

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Linear Polyurethanes from Polyalkylene Ether Glycols

Cited by 45 publications

References 0 publications

Cationic copolymerization of 1,3‐dioxolane with some cyclic ethers

Cationic copolymerization of 1,3‐dioxolane with some cyclic ethers

Urethane Coatings

Kinetic Aspects of the Copolymerization of Tetrahydrofuran With Propylene Oxide. I

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