Cationic cyclization of neoprene with a diethylaluminum chloride and organic chloride catalyst system

Chaoyang Wang; Xuepin Huang; Jihua Yang

doi:10.1002/app.11196

Cationic cyclization of neoprene with a diethylaluminum chloride and organic chloride catalyst system

Chaoyang Wang, Xuepin Huang, Jihua Yang

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2 Scopus citations

Abstract

The cyclization of neoprene was achieved with the aid of a cationic catalyst system based on diethyl-aluminum chloride (Et₂AlCl) and an organic chloride, allyl chloride (CH₂ = CHCH₂Cl) or benzyl chloride (C₆H₅CH₂Cl). The main parameters of the cyclization process were investigated. Elastomers with low intrinsic viscosity, ready solubility and some gelling were obtained. Xylene was a good solvent for the cyclization process, which took place in a very short time (≤5 min). The products were characterized with IR, ¹H-NMR, differential scanning calorimetry, and gel permeation chromatography. The polycyclic structure was determined. The degree of cyclization and the incorporated solvent content were estimated with a ¹H-NMR method.

Original language	English (US)
Pages (from-to)	2227-2231
Number of pages	5
Journal	Journal of Applied Polymer Science
Volume	86
Issue number	9
DOIs	https://doi.org/10.1002/app.11196
State	Published - Nov 28 2002
Externally published	Yes

Keywords

Cationic cyclization
Elastomers
Modification
Rubber

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10.1002/app.11196

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title = "Cationic cyclization of neoprene with a diethylaluminum chloride and organic chloride catalyst system",

abstract = "The cyclization of neoprene was achieved with the aid of a cationic catalyst system based on diethyl-aluminum chloride (Et2AlCl) and an organic chloride, allyl chloride (CH2 = CHCH2Cl) or benzyl chloride (C6H5CH2Cl). The main parameters of the cyclization process were investigated. Elastomers with low intrinsic viscosity, ready solubility and some gelling were obtained. Xylene was a good solvent for the cyclization process, which took place in a very short time (≤5 min). The products were characterized with IR, 1H-NMR, differential scanning calorimetry, and gel permeation chromatography. The polycyclic structure was determined. The degree of cyclization and the incorporated solvent content were estimated with a 1H-NMR method.",

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T1 - Cationic cyclization of neoprene with a diethylaluminum chloride and organic chloride catalyst system

AU - Wang, Chaoyang

AU - Huang, Xuepin

AU - Yang, Jihua

PY - 2002/11/28

Y1 - 2002/11/28

N2 - The cyclization of neoprene was achieved with the aid of a cationic catalyst system based on diethyl-aluminum chloride (Et2AlCl) and an organic chloride, allyl chloride (CH2 = CHCH2Cl) or benzyl chloride (C6H5CH2Cl). The main parameters of the cyclization process were investigated. Elastomers with low intrinsic viscosity, ready solubility and some gelling were obtained. Xylene was a good solvent for the cyclization process, which took place in a very short time (≤5 min). The products were characterized with IR, 1H-NMR, differential scanning calorimetry, and gel permeation chromatography. The polycyclic structure was determined. The degree of cyclization and the incorporated solvent content were estimated with a 1H-NMR method.

AB - The cyclization of neoprene was achieved with the aid of a cationic catalyst system based on diethyl-aluminum chloride (Et2AlCl) and an organic chloride, allyl chloride (CH2 = CHCH2Cl) or benzyl chloride (C6H5CH2Cl). The main parameters of the cyclization process were investigated. Elastomers with low intrinsic viscosity, ready solubility and some gelling were obtained. Xylene was a good solvent for the cyclization process, which took place in a very short time (≤5 min). The products were characterized with IR, 1H-NMR, differential scanning calorimetry, and gel permeation chromatography. The polycyclic structure was determined. The degree of cyclization and the incorporated solvent content were estimated with a 1H-NMR method.

KW - Cationic cyclization

KW - Elastomers

KW - Modification

KW - Rubber

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Cationic cyclization of neoprene with a diethylaluminum chloride and organic chloride catalyst system

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