On the microstructure of methyl acrylate-4-vinyl pyridine copolymers

Natansohn, Almeria; Maxim, Steliana; Feldman, D.

doi:10.1016/0014-3057(78)90021-6

Cited by 7 publications

(4 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Similar trend was observed in conventional copolymerization of methyl acrylate‐4VP ( r m = 0,18, r v = 1.77),35 whereas a alternation tendency is reported with the tert ‐butyl acrylate‐4VP pair ( r tBA = 0.054, r v = 0.046) 39. The r v value of 4VP obtained by Nickel complex is somewhat higher than that tabulated for conventional copolymerization of MMA‐4VP ( r m = 0.574, r v = 0.79),33 while the r m one is in good agreement.…”

Section: Resultssupporting

confidence: 82%

“…The 1 H NMR copolymer signals exhibit an overall shift toward higher fields with increasing 4VP unit in the copolymer chains due to the well‐known screening effect of aromatic nucleus. Similar behavior was observed by Natanshon et al with copolymers of methyl acrylate (MA) or MMA with 2VP or 4VP 34–36. Simultaneously, The signals belonging to aromatic, methoxy, and α‐CH 3 groups are split with an increase in 4VP content in copolymers due to their compositional (monomer sequence distribution) as well as configurational sensitivity.…”

Section: Resultssupporting

confidence: 80%

“…Similar behavior was observed by Natanshon et al with copolymers of methyl acrylate (MA) or MMA with 2VP or 4VP. [34][35][36] Simultaneously, The signals belonging to aromatic, methoxy, and a-CH 3 groups are split with an increase in 4VP content in copolymers due to their compositional (monomer sequence distribution) as well as configurational sensitivity. In agreement with Natanshon et al studies, these signals are tentatively assigned in terms of triads and are depicted in Figure 4, where M and V indicate MMA and 4VP, respectively.…”

Section: Copolymer Stereochemistrymentioning

confidence: 98%

See 2 more Smart Citations

Copolymerization of methyl methacrylate with 4‐vinylpyridine initiated by a novel Ni(II)α‐Benzoinoxime complex

Harrar-Ferfera

2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

Copolymerizations of methyl methacrylate (MMA) with 4-vinylpyridine (4VP) were performed from different monomer feed ratios in 1,4-dioxan at 308C under free radical initiation experimental conditions, using Ni(II)a-Benzoinoxime complex as initiator. The obtained copolymers (PMMA4VP) were examined by FTIR and 1 H NMR spectroscopies. The composition of these copolymers was calculated, using 1 H NMR spectra and elemental analysis. Monomer reactivity ratios were estimated from Fineman-Ross (FR, r m 5 0.550, r v 5 1.165) and Kelen-Tudos (KT, r m 5 0.559, r v 5 1.286) linearization methods, as well as nonlinear error in variables model (EVM) method using the RREVM computer program (RREVM, r m 5 0.559, r v 5 1.264). These values suggest that MMA-4VP pair copolymerizes randomly. 1 H NMR spectra provide information about the stereochemistry of the copolymers in terms of sequence distributions and configurations. These results showed that the age of the Ni complex has an impact not only on its activity towards polymerization reactions but also on the features of the corresponding copolymers, whereas the chemical composition was insensitive to this prominent factor. The mechanism of MMA-4VP copolymerization is consistent with a radical process as supported by microstructure and molecular weight distribution studies. Thermal behaviours of these copolymers were investigated by differential scanning calorimetry and thermogravimetric analysis.

show abstract

Section: Resultssupporting

confidence: 82%

Section: Resultssupporting

confidence: 80%

Section: Copolymer Stereochemistrymentioning

confidence: 98%

See 1 more Smart Citation

Copolymerization of methyl methacrylate with 4‐vinylpyridine initiated by a novel Ni(II)α‐Benzoinoxime complex

Harrar-Ferfera

2007

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Various coworkers have reported the controlled polymerization of poly (2‐hydroxy ethyl methacrylate) (PHEMA) by atom transfer radical polymerization 15–17. The sequence distribution in 4‐vinyl pyridine copolymers with methyl acrylate and acrylonitrile have been well reported earlier 18–20. To the best of our knowledge, the microstructure of 2‐hydroxy ethyl methacrylate and 2‐vinyl pyridine (H/V) copolymers has not been reported so far.…”

Section: Introductionmentioning

confidence: 99%

NMR studies of poly(2‐hydroxy ethyl methacrylate‐co‐2‐vinyl pyridine)

Hooda

Brar

Goyal

2008

J of Applied Polymer Sci

View full text Add to dashboard Cite

Copolymers of 2-hydroxy ethyl methacrylate-2-vinyl pyridine (H/V) of different composition were synthesized by free radical bulk polymerization using azobisisobutyronitrile (AIBN) as an initiator under nitrogen atmosphere. The copolymer compositions were calculated from 1 H NMR spectra. The reactivity ratios for H/V copolymers obtained from a linear Kelen-Tudos method (KT) and nonlinear error-in-variables method (EVM) are r H 5 0.50 6 0.10, r V 5 1.04 6 0.08 and r H 5 0.55, r V 5 1.06 respectively. The complete spectral assignment of methine, methylene, methyl, carbonyl, and aromatic carbon regions in term of compositional and configurational sequences of H/V copolymers were done with the help of 13 C{ 1 H} NMR, distortionless enhancement by polarization transfer (DEPT), two-dimensional heteronuclear single quantum coherence (HSQC) along with total correlated spectroscopy (TOCSY).

show abstract

NMR analysis of the microstructure of poly(methyl acrylate‐co‐N‐vinylcarbazole)

Crone

Natansohn

1992

J. Polym. Sci. A Polym. Chem.

View full text Add to dashboard Cite

SYNOPSISThe microstructure of a series of high conversion copolymers of methyl acrylate (MA) and N-vinylcarbazole (NVC) was characterized by NMR. 'H-and 13C-NMR spectra were assigned by comparison to the homopolymers and by using heteronuclear shift correlation spectroscopy. MA-centered triad distributions were obtained from the carbonyl carbon. Distributions of NVC sequences were determined from aromatic carbons 1 and 8a, and aromatic proton 1.These experimentally determined sequence distributions were compared to those calculated from reactivity ratios approximated from the copolymer compositions. Agreement was very good for low NVC content copolymers. Three signals were particularly useful in providing rapid assessment of the distribution of NVC units within low NVC content copolymers: proton 1 and carbon 1 of NVC and the carbonyl carbon of MA. 0 1992

show abstract

On the microstructure of methyl acrylate-4-vinyl pyridine copolymers

Cited by 7 publications

References 7 publications

Copolymerization of methyl methacrylate with 4‐vinylpyridine initiated by a novel Ni(II)α‐Benzoinoxime complex

Copolymerization of methyl methacrylate with 4‐vinylpyridine initiated by a novel Ni(II)α‐Benzoinoxime complex

NMR studies of poly(2‐hydroxy ethyl methacrylate‐co‐2‐vinyl pyridine)

NMR analysis of the microstructure of poly(methyl acrylate‐co‐N‐vinylcarbazole)

Contact Info

Product

Resources

About