Thermodynamics of copolymerization of vinyl acetate and vinyl pivalate

H. D. Ghim; J. P. Kim; W. S. Lyoo

doi:10.1016/S0032-3861(02)00738-3

Thermodynamics of copolymerization of vinyl acetate and vinyl pivalate

H. D. Ghim, J. P. Kim, W. S. Lyoo

Department of Textile System Engineering

Research output: Contribution to journal › Article › peer-review

4 Scopus citations

Abstract

Vinyl pivalate (VPi) and vinyl acetate (VAc) were copolymerized at low temperature using 2,2′-azobis(2,4-dimethylvaleronitrile) as an initiator. Copoly(VPi/VAc) was prepared in a broad range of chemical composition, from 0/10 to 10/0 of VPi/VAc molar feed ratio. A statistical treatment of the ¹H NMR peak intensities brought to the determination of the reactivity ratios of the comonomers. A thermodynamic study of the molecular dynamics simulation data led to the estimation of number-average sequence lengths of comonomers and Gibbs free energy change over VPi content. From this result, the retardation of copolymerization rate at about 5/5 composition was also explained. Enthalpies of -VAc-VPi*, -VPi-VAc*, and -VPi-VPi* formation were calculated as -12.07, -5.57, and -18.33 kcal/mol, respectively.

Original language	English
Pages (from-to)	895-900
Number of pages	6
Journal	Polymer
Volume	44
Issue number	3
DOIs	https://doi.org/10.1016/S0032-3861(02)00738-3
State	Published - 20 Dec 2002

Keywords

Copolymerization
Vinyl acetate
Vinyl pivalate

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10.1016/S0032-3861(02)00738-3

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title = "Thermodynamics of copolymerization of vinyl acetate and vinyl pivalate",

abstract = "Vinyl pivalate (VPi) and vinyl acetate (VAc) were copolymerized at low temperature using 2,2′-azobis(2,4-dimethylvaleronitrile) as an initiator. Copoly(VPi/VAc) was prepared in a broad range of chemical composition, from 0/10 to 10/0 of VPi/VAc molar feed ratio. A statistical treatment of the 1H NMR peak intensities brought to the determination of the reactivity ratios of the comonomers. A thermodynamic study of the molecular dynamics simulation data led to the estimation of number-average sequence lengths of comonomers and Gibbs free energy change over VPi content. From this result, the retardation of copolymerization rate at about 5/5 composition was also explained. Enthalpies of -VAc-VPi*, -VPi-VAc*, and -VPi-VPi* formation were calculated as -12.07, -5.57, and -18.33 kcal/mol, respectively.",

keywords = "Copolymerization, Vinyl acetate, Vinyl pivalate",

author = "Ghim, {H. D.} and Kim, {J. P.} and Lyoo, {W. S.}",

year = "2002",

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doi = "10.1016/S0032-3861(02)00738-3",

language = "English",

volume = "44",

pages = "895--900",

journal = "Polymer",

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TY - JOUR

T1 - Thermodynamics of copolymerization of vinyl acetate and vinyl pivalate

AU - Ghim, H. D.

AU - Kim, J. P.

AU - Lyoo, W. S.

PY - 2002/12/20

Y1 - 2002/12/20

N2 - Vinyl pivalate (VPi) and vinyl acetate (VAc) were copolymerized at low temperature using 2,2′-azobis(2,4-dimethylvaleronitrile) as an initiator. Copoly(VPi/VAc) was prepared in a broad range of chemical composition, from 0/10 to 10/0 of VPi/VAc molar feed ratio. A statistical treatment of the 1H NMR peak intensities brought to the determination of the reactivity ratios of the comonomers. A thermodynamic study of the molecular dynamics simulation data led to the estimation of number-average sequence lengths of comonomers and Gibbs free energy change over VPi content. From this result, the retardation of copolymerization rate at about 5/5 composition was also explained. Enthalpies of -VAc-VPi*, -VPi-VAc*, and -VPi-VPi* formation were calculated as -12.07, -5.57, and -18.33 kcal/mol, respectively.

AB - Vinyl pivalate (VPi) and vinyl acetate (VAc) were copolymerized at low temperature using 2,2′-azobis(2,4-dimethylvaleronitrile) as an initiator. Copoly(VPi/VAc) was prepared in a broad range of chemical composition, from 0/10 to 10/0 of VPi/VAc molar feed ratio. A statistical treatment of the 1H NMR peak intensities brought to the determination of the reactivity ratios of the comonomers. A thermodynamic study of the molecular dynamics simulation data led to the estimation of number-average sequence lengths of comonomers and Gibbs free energy change over VPi content. From this result, the retardation of copolymerization rate at about 5/5 composition was also explained. Enthalpies of -VAc-VPi*, -VPi-VAc*, and -VPi-VPi* formation were calculated as -12.07, -5.57, and -18.33 kcal/mol, respectively.

KW - Copolymerization

KW - Vinyl acetate

KW - Vinyl pivalate

UR - http://www.scopus.com/inward/record.url?scp=0037147454&partnerID=8YFLogxK

U2 - 10.1016/S0032-3861(02)00738-3

DO - 10.1016/S0032-3861(02)00738-3

M3 - Article

AN - SCOPUS:0037147454

SN - 0032-3861

VL - 44

SP - 895

EP - 900

JO - Polymer

JF - Polymer

IS - 3

ER -

Thermodynamics of copolymerization of vinyl acetate and vinyl pivalate

Abstract

Keywords

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