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1984•Journal of Macromolecular Science Part A - ChemistryRequires access

Copolymerization of Acrylonitrile with Haloalkyl Acrylates and Methacrylates

P. Bajaj, Munirathna Padmanaban

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Abstract

Acrylonitrile (M1) was copolymerized with haloalkyl acrylates/ methacrylates (M2) in a water-acetone [2:1 (v/v)] medium at 40°C. The composition of the copolymers was determined from the nitrogen content, and the reactivity ratios were calculated by the Kelen-Tüdos method. The low ri values (acryionitrile) in acrylonitrile (AN)-2-bromoethyl acrylate (BEA)/2-bromoethyl methacrylate (BEMA) as compared to acrylonitrile-2-chloroethyl acrylate (AN-CEA) and acrylonitrile-2-chloroethyl methacrylate (AN-CEMA) may be attributed to the higher reactivity of bromo-alkyl monomers (BEA and BEMA) toward the polyacrylonitrile radical. Further, r1 tends to decrease when M2 is changed from acrylate to methacrylate, viz., r1(AN-BEA)> r1(AN-BEMA), while the trend is reversed in chloroalkyl acrylate monomers, i.e., r1 (AN-CEA) < r1 (AN-CEMA).

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What this paper is about

Acrylonitrile (M1) was copolymerized with haloalkyl acrylates/ methacrylates (M2) in a water-acetone [2:1 (v/v)] medium at 40°C. The composition of the copolymers was determined from the nitrogen content, and the reactivity ratios were calculated by the Kelen-Tüdos method. The low ri values (acryionitrile) in acrylonitrile (AN)-2-bromoethyl acrylate (BEA)/2-bromoethyl methacrylate (BEMA) as compared to acrylonitrile-2-chloroethyl acrylate (AN-CEA) and acrylonitrile-2-chloroethyl methacrylate (AN-CEMA) may be attributed to the higher reactivity of bromo-alkyl monomers (BEA and BEMA) toward the polyacrylonitrile radical. Further, r1 tends to decrease when M2 is changed from acrylate to methacrylate, viz., r1(AN-BEA)> r1(AN-BEMA), while the trend is reversed in chloroalkyl acrylate monomers, i.e., r1 (AN-CEA) < r1 (AN-CEMA).

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Available abstract

Acrylonitrile (M1) was copolymerized with haloalkyl acrylates/ methacrylates (M2) in a water-acetone [2:1 (v/v)] medium at 40°C. The composition of the copolymers was determined from the nitrogen content, and the reactivity ratios were calculated by the Kelen-Tüdos method. The low ri values (acryionitrile) in acrylonitrile (AN)-2-bromoethyl acrylate (BEA)/2-bromoethyl methacrylate (BEMA) as compared to acrylonitrile-2-chloroethyl acrylate (AN-CEA) and acrylonitrile-2-chloroethyl methacrylate (AN-CEMA) may be attributed to the higher reactivity of bromo-alkyl monomers (BEA and BEMA) toward the polyacrylonitrile radical. Further, r1 tends to decrease when M2 is changed from acrylate to methacrylate, viz., r1(AN-BEA)> r1(AN-BEMA), while the trend is reversed in chloroalkyl acrylate monomers, i.e., r1 (AN-CEA) < r1 (AN-CEMA).

Key concepts: Acrylonitrile, Methacrylate, Copolymer, Polyacrylonitrile, Polymer chemistry, Reactivity (psychology), Acrylate, Monomer

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