Cationic Copolymers of Isobutylene. 3. Nuclear Magnetic Resonance Investigation of the Structure of Isobutylene-trans-1,3-Pentadiene Copolymer

Corno, C.; Priola, Aldo; Cesca, S.

doi:10.1021/ma60077a014

Cited by 9 publications

(4 citation statements)

References 3 publications

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“… a Observed data taken from ref ; calculated intensities analyzed via the program PERTEMG. b Feed, f A = 0.500 and conversion = 6.6%.…”

Section: Examples Of Perturbed Model With Emg Functionmentioning

confidence: 99%

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NMR Characterization of Copolymers That Exhibit Nonsymmetric Compositional Heterogeneity

Cheng

1997

Macromolecules

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The perturbed first-order Markovian model has been developed for copolymers that exhibit nonsymmetric chemical compositional distribution. An exponentially modified Gaussian function is first used to approximate the distribution. The theoretical probability expressions for the comonomer diads, triads, and tetrads are derived. Using these expressions, one can analyze the observed NMR data and fit them to the perturbed Markovian model. The formalism given herein is next extended to the general case of an arbitrary chemical composition distribution. Computer programs have been written to facilitate the analyses, and examples are given to illustrate the use of these computer-assisted approaches.

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“… a Observed data taken from ref ; calculated intensities analyzed via the program PERTEMG. b Feed, f A = 0.500 and conversion = 6.6%.…”

Section: Examples Of Perturbed Model With Emg Functionmentioning

confidence: 99%

“…Isobutylene/Isoprene Copolymers. Corno et al 38 have copolymerized isobutylene and isoprene using cationic means. They made several samples at different conversions and different comonomer feed ratios and obtained the triad intensities from both 1 H and 13 C NMR spectra.…”

Section: Examples Of Perturbed Model With Emg Functionmentioning

confidence: 99%

NMR Characterization of Copolymers That Exhibit Nonsymmetric Compositional Heterogeneity

Cheng

1997

Macromolecules

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“…Isobutene is regarded as a monomer for cationic polymerization − and for cationic copolymerization with styrene and dienes. − The coordination polymerization of such 1,1-disubstituted olefins is rare because of the steric hindrance between the polymer end and the new monomer. Very recently, neutral palladium complexes with phosphine–sulfonate ligand systems have been reported to copolymerize ethylene and 1,1-disubstituted olefins having functional groups.…”

Section: Introductionmentioning

confidence: 99%

Pd-Promoted Copolymerization of Methallyl and Isoprenyl Ethers and Acetate with α-Olefins

et al. 2019

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1,1-Disubstituted ethylene derivatives with oxygen functionalities, such as methallyl and isoprenyl ethers and acetate, were employed as comonomers with α-olefins catalyzed by Pd–diimine complexes. A mixture of a chloro(methyl)palladium complex with α-diimine ligand having 2,4,6-trimethylphenyl groups at the coordinated N atoms (I) and Na+B{C6H3(CF3)2-3,5}4 – catalyzes the copolymerization of 1-decene with methallyl tert-butyl ether (1) at 0 °C to produce copolymers with comonomer content of 9.7 mol %. Methallyl acetate (2) undergoes copolymerization with 1-decene to afford the corresponding copolymers with comonomer content of 1.0 to 3.3 mol %. Nuclear magnetic resonance analyses of the copolymers of 1-decene with 1 and 2 revealed that no significant β-alkoxy or β-acetate elimination takes place during the polymerization and that the insertion mode of the comonomer determines the location of the monomer on either the main chain or the terminal of the copolymer. Related compounds, isoprenyl tert-butyl ether (3), isoprenyl acetate (4), and isoprenyl trimethylsilyl ether (5), undergo copolymerization with 1-decene or 1-hexene to afford the corresponding copolymers with comonomer content of 1.0 to 6.2 mol %. The reaction with a higher concentration of a comonomer results in the formation of polymers with higher comonomer content.

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“…Although there have been some reports about the cationic copolymer of PD with other monomers, such as olefin, styrene [4][5][6][7][8][9][10][11], research in the cationic copolymerization of PD with AP has rarely been reported. We are interested in the cationic PD-AP copolymerization because it is of significance for synthesis of the copolymer with high softening point and light color.…”

Section: Introductionmentioning

confidence: 99%

Cationic copolymerization of 1,3-pentadiene with α-pinene

Sun²,

Zhang

et al. 2014

Journal of Polymer Engineering

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The cationic copolymerization of 1,3-pentadiene (PD) with α-pinene (AP) initiated by aluminum trichloride (AlCl 3 ) was carried out in N-pentane solvent. The effects of the polymerization temperature and the comonomer composition on the yield of the copolymer, softening point, Gardner color scale and number-average molecular weight (Mn) are discussed. The performance of the copolymer was better than that of AP homopolymer (PAP) and PD homopolymer (PPD). The structure of the copolymer was characterized by Fourier transform infrared spectro scopy (FT-IR), 1 H-nuclear magnetic resonance ( 1 H-NMR), 13 C-NMR, differential scanning calorimetry (DSC) and gel permeation chromatography (GPC). In addition, the reactivity ratios for AP (M1) and PD (M2) determined by the Kelen-Tudos method from lowconversion data are r1 = 0.58 and r2 = 5.92, respectively.

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Cationic Copolymers of Isobutylene. 3. Nuclear Magnetic Resonance Investigation of the Structure of Isobutylene-trans-1,3-Pentadiene Copolymer

Cited by 9 publications

References 3 publications

NMR Characterization of Copolymers That Exhibit Nonsymmetric Compositional Heterogeneity

NMR Characterization of Copolymers That Exhibit Nonsymmetric Compositional Heterogeneity

Pd-Promoted Copolymerization of Methallyl and Isoprenyl Ethers and Acetate with α-Olefins

Cationic copolymerization of 1,3-pentadiene with α-pinene

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