Monomer reactivity ratios for acrylonitrile-methyl acrylate free-radical copolymerization

K. B. Wiles, V. A. Bhanu, A. J. Pasquale, Timothy Edward Long, J. E. McGrath

研究成果: Article

43 引用 (Scopus)

抄録

Nonlinear monomer reactivity ratios for the homogeneous free-radical copolymerization of acrylonitrile and methyl acrylate were determined from 1H NMR and real-time Fourier transform infrared (FTIR) analyses. All 1H NMR data were obtained on polymers isolated at low conversions (<10%), whereas the FTIR data were collected in situ. The copolymerizations were conducted in N,N-dimethylformamide at 62°C and were initiated with azobisisobutyronitrile. The real-time FTIR technique allowed for many data points to be collected for each feed composition, which enabled the calculation of copolymer compositions (dM 1/dM 2) with better accuracy. Monomer reactivity ratios were estimated with the Mayo-Lewis method and then were refined via a nonlinear least-squares analysis first suggested by Mortimer and Tidwell. Thus, monomer reactivity ratios at the 95% confidence level were determined to be 1.29 ± 0.2 and 0.96 ± 0.2 for acrylonitrile and methyl acrylate, respectively, which were valid under the specific system conditions (i.e., solvent and temperature) studied. The results are useful for the development of acrylonitrile (<90%) and methyl acrylate, melt-processable copolymer fibers and films, including precursors for carbon fibers.

元の言語English
ページ(範囲)2994-3001
ページ数8
ジャーナルJournal of Polymer Science, Part A: Polymer Chemistry
42
発行部数12
DOI
出版物ステータスPublished - 2004 6 15
外部発表Yes

Fingerprint

Acrylonitrile
Free radicals
Copolymerization
Free Radicals
Fourier transforms
Monomers
Infrared radiation
Copolymers
Nuclear magnetic resonance
Dimethylformamide
Chemical analysis
Carbon fibers
Polymers
Fibers
methyl acrylate
Temperature

ASJC Scopus subject areas

  • Polymers and Plastics
  • Organic Chemistry
  • Materials Chemistry

これを引用

Monomer reactivity ratios for acrylonitrile-methyl acrylate free-radical copolymerization. / Wiles, K. B.; Bhanu, V. A.; Pasquale, A. J.; Long, Timothy Edward; McGrath, J. E.

:: Journal of Polymer Science, Part A: Polymer Chemistry, 巻 42, 番号 12, 15.06.2004, p. 2994-3001.

研究成果: Article

Wiles, K. B. ; Bhanu, V. A. ; Pasquale, A. J. ; Long, Timothy Edward ; McGrath, J. E. / Monomer reactivity ratios for acrylonitrile-methyl acrylate free-radical copolymerization. :: Journal of Polymer Science, Part A: Polymer Chemistry. 2004 ; 巻 42, 番号 12. pp. 2994-3001.
@article{f0ec44fdfa5d4e97afbe1b7dce3d4b19,
title = "Monomer reactivity ratios for acrylonitrile-methyl acrylate free-radical copolymerization",
abstract = "Nonlinear monomer reactivity ratios for the homogeneous free-radical copolymerization of acrylonitrile and methyl acrylate were determined from 1H NMR and real-time Fourier transform infrared (FTIR) analyses. All 1H NMR data were obtained on polymers isolated at low conversions (<10{\%}), whereas the FTIR data were collected in situ. The copolymerizations were conducted in N,N-dimethylformamide at 62°C and were initiated with azobisisobutyronitrile. The real-time FTIR technique allowed for many data points to be collected for each feed composition, which enabled the calculation of copolymer compositions (dM 1/dM 2) with better accuracy. Monomer reactivity ratios were estimated with the Mayo-Lewis method and then were refined via a nonlinear least-squares analysis first suggested by Mortimer and Tidwell. Thus, monomer reactivity ratios at the 95{\%} confidence level were determined to be 1.29 ± 0.2 and 0.96 ± 0.2 for acrylonitrile and methyl acrylate, respectively, which were valid under the specific system conditions (i.e., solvent and temperature) studied. The results are useful for the development of acrylonitrile (<90{\%}) and methyl acrylate, melt-processable copolymer fibers and films, including precursors for carbon fibers.",
keywords = "Acrylonitrile, In situ FT-IR, Methyl acrylate, Nonlinear analysis, Reactivity ratios",
author = "Wiles, {K. B.} and Bhanu, {V. A.} and Pasquale, {A. J.} and Long, {Timothy Edward} and McGrath, {J. E.}",
year = "2004",
month = "6",
day = "15",
doi = "10.1002/pola.20149",
language = "English",
volume = "42",
pages = "2994--3001",
journal = "Journal of Polymer Science, Part A: Polymer Chemistry",
issn = "0887-624X",
publisher = "John Wiley and Sons Inc.",
number = "12",

}

TY - JOUR

T1 - Monomer reactivity ratios for acrylonitrile-methyl acrylate free-radical copolymerization

AU - Wiles, K. B.

AU - Bhanu, V. A.

AU - Pasquale, A. J.

AU - Long, Timothy Edward

AU - McGrath, J. E.

PY - 2004/6/15

Y1 - 2004/6/15

N2 - Nonlinear monomer reactivity ratios for the homogeneous free-radical copolymerization of acrylonitrile and methyl acrylate were determined from 1H NMR and real-time Fourier transform infrared (FTIR) analyses. All 1H NMR data were obtained on polymers isolated at low conversions (<10%), whereas the FTIR data were collected in situ. The copolymerizations were conducted in N,N-dimethylformamide at 62°C and were initiated with azobisisobutyronitrile. The real-time FTIR technique allowed for many data points to be collected for each feed composition, which enabled the calculation of copolymer compositions (dM 1/dM 2) with better accuracy. Monomer reactivity ratios were estimated with the Mayo-Lewis method and then were refined via a nonlinear least-squares analysis first suggested by Mortimer and Tidwell. Thus, monomer reactivity ratios at the 95% confidence level were determined to be 1.29 ± 0.2 and 0.96 ± 0.2 for acrylonitrile and methyl acrylate, respectively, which were valid under the specific system conditions (i.e., solvent and temperature) studied. The results are useful for the development of acrylonitrile (<90%) and methyl acrylate, melt-processable copolymer fibers and films, including precursors for carbon fibers.

AB - Nonlinear monomer reactivity ratios for the homogeneous free-radical copolymerization of acrylonitrile and methyl acrylate were determined from 1H NMR and real-time Fourier transform infrared (FTIR) analyses. All 1H NMR data were obtained on polymers isolated at low conversions (<10%), whereas the FTIR data were collected in situ. The copolymerizations were conducted in N,N-dimethylformamide at 62°C and were initiated with azobisisobutyronitrile. The real-time FTIR technique allowed for many data points to be collected for each feed composition, which enabled the calculation of copolymer compositions (dM 1/dM 2) with better accuracy. Monomer reactivity ratios were estimated with the Mayo-Lewis method and then were refined via a nonlinear least-squares analysis first suggested by Mortimer and Tidwell. Thus, monomer reactivity ratios at the 95% confidence level were determined to be 1.29 ± 0.2 and 0.96 ± 0.2 for acrylonitrile and methyl acrylate, respectively, which were valid under the specific system conditions (i.e., solvent and temperature) studied. The results are useful for the development of acrylonitrile (<90%) and methyl acrylate, melt-processable copolymer fibers and films, including precursors for carbon fibers.

KW - Acrylonitrile

KW - In situ FT-IR

KW - Methyl acrylate

KW - Nonlinear analysis

KW - Reactivity ratios

UR - http://www.scopus.com/inward/record.url?scp=2942696447&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=2942696447&partnerID=8YFLogxK

U2 - 10.1002/pola.20149

DO - 10.1002/pola.20149

M3 - Article

AN - SCOPUS:2942696447

VL - 42

SP - 2994

EP - 3001

JO - Journal of Polymer Science, Part A: Polymer Chemistry

JF - Journal of Polymer Science, Part A: Polymer Chemistry

SN - 0887-624X

IS - 12

ER -