Alternating Copolymerization of Chloroprene with Acrylonitrile

Irako, Koichi; Koyama, Haruo; Anzai, Shiro

doi:10.1246/nikkashi1898.74.10_2210

Cited by 4 publications

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Polychloroprene

Witsiepe¹

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Polychloroprene has been in commercial use for over 60 years, but continues to be the elastomer of choice for dynamic applications requiring moderate heat and oil resistance, or where long‐term environmental resistance is required. The material is manufactured by emulsion polymerization of 2‐chloro‐1,3‐butadiene. The properties of the product can be optimized for specific end uses by selection of polymerization conditions, by use of comonomers such as 2,3‐dichlorobutadiene and methacrylic acid, and by choice of the method used to control molecular weight. The kinetics of the polymerization process and the structure of the polymer have been studied in detail and related to polymer properties. Commercial products vary widely in properties depending on the intended end use and the details of the manufacturing process. Tough crystalline or ionomeric polymers are preferred for adhesive applications, whereas softer, more flexible polymers are preferred for mechanical goods applications. The latter polymers may be compounded and fabricated by substantially all the techniques used for manufacture of rubber goods by molding, extrusion, or calendering operations. Lattices are used for various bonding and adhesive applications as well as for dipped goods requiring toughness in the unreinforced film.

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Polychloroprene

Witsiepe¹

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Chloroprene Polymers

Glenn¹

2005

Encyclopedia of Polymer Science and Technology

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Polychloroprene has been in commercial use for over 60 years, but continues to be the elastomer of choice for dynamic applications requiring moderate heat and oil resistance, or where long‐term environmental resistance is required. The material is manufactured by emulsion polymerization of 2‐chloro‐1,3‐butadiene. The properties of the product can be optimized for specific end used by selection of polymerization conditions, by use of comonomers such as 2,3‐dichlorobutadiene and methacrylic acid, and by choice of the method used to control molecular weight. The kinetics of the polymerization process and the structure of the polymer have been studied in detail and related to polymer properties. Commercial products vary widely in properties depending on the intended end use and the details of the manufacturing process. Tough crystalline or ionomeric polymers are preferred for adhesive applications, whereas softer, more flexible polymers are preferred for mechanical goods applications. The latter polymers may be compounded and fabricated by substantially all the techniques used for manufacture of rubber goods by molding, extrusion, or calendering operations. Latexes are used for various bonding and adhesive applications as well as for dipped goods requiring toughness in the unreinforced film.

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Donor‐acceptor complexes in copolymerization. L. Preparation and microstructure of chlorine‐containing alternating conjugated diene–acceptor monomer copolymers

Gaylord

Patnaik

1975

J. Polym. Sci. Polym. Chem. Ed.

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Neighboring monomer units cause significant shifts in the infrared absorption peaks attributed to cis‐ and trans‐1,4 units in conjugated diene‐acceptor monomer copolymers. Conjugated diene‐maleic anhydride alternating copolymers apparently have a predominantly cis‐1,4‐structure, while alternating diene‐SO2 copolymers have a predominantly trans‐1,4 structure. Alternating copolymers of butadiene, isoprene, and pentadiene‐1,3 with α‐chloroacrylonitrile and methyl α‐chloroacrylate, prepared in the presence of Et1.5AlCl1.5(EASC), have trans‐1,4 unsaturation. Alternating copolymers of chloroprene with acrylonitrile, methyl acrylate, methyl methacrylate, α‐chloroacrylonitrile, and methyl α‐chloroacrylate prepared in the presence of EASC‐VOCl3 have trans‐1,4 configuration. The reaction between chloroprene and acrylonitrile in the presence of AlCl3 yields the cyclic Diel‐Alder adduct in the dark and the alternating copolymer under ultraviolet irradiation. The equimolar, presumably alternating, copolymers of chloroprene with methyl acrylate and methyl methacrylate undergo cyclization at 205°C to a far lesser extent than theoretically calculated, to yield five and seven‐membered lactones. The polymerization of chloroprene in the presence of EASC and acetonitrile yields a radical homopolymer with trans‐1,4 unsaturation.

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Alternating Copolymerization of Chloroprene with Acrylonitrile

Cited by 4 publications

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Polychloroprene

Polychloroprene

Chloroprene Polymers

Donor‐acceptor complexes in copolymerization. L. Preparation and microstructure of chlorine‐containing alternating conjugated diene–acceptor monomer copolymers

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