Preparation and properties of some poly‐α‐methylstyrenes

Burge, David E.; Bruss, D. B.

doi:10.1002/pol.1963.100010608

Cited by 14 publications

(8 citation statements)

References 13 publications

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“…Intrinsic viscosity, [η] (mL/g), was measured at 25°C in THF. Viscosity‐average molecular weight, M v , was calculated according to the following equation12: …”

Section: Methodsmentioning

confidence: 99%

Maghnite‐H⁺, a solid catalyst for the cationic polymerization of α‐methylstyrene

Ayat

Harrane

Belbachir

2008

J of Applied Polymer Sci

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The polymerization of a-methylstyrene (AMS) catalyzed by Maghnite-H 1 (Mag-H) was investigated. Mag-H is a montmorillonite sheet silicate clay, exchanged with protons. It was found that the cationic polymerization of AMS is initiated by Mag-H at ambient temperature in bulk and in solution. The effect of the amount of Mag-H, the temperature, and the solvent was studied. The polymerization rate increased with increase in the temperature and the proportion of catalyst, and it was larger in nonpolar solvents. These results indicated the cationic nature of the polymerization. It may be suggested that the polymerization is initiated by proton addition to monomer from Mag-H.

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“…Intrinsic viscosity, [η] (mL/g), was measured at 25°C in THF. Viscosity‐average molecular weight, M v , was calculated according to the following equation12: …”

Section: Methodsmentioning

confidence: 99%

Maghnite‐H⁺, a solid catalyst for the cationic polymerization of α‐methylstyrene

Ayat

Harrane

Belbachir

2008

J of Applied Polymer Sci

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“…The results are presented in Table 3 and 4, respectively. The cationic polymerization of AMS was examined in the presence of Na + -MMT as a catalyst at 0 °C for 6 h. The spectrum ( Figure 5) showed different peaks [34,35], the methylene groups of the main chain as large signal in the range of 1.5-2 ppm, the terminal methyl groups at 1.2 ppm. Besides these well-known resonances, analysis shows at 5 ppm the characteristic resonance of the protons borne by the terminal double bond.…”

Section: Spectroscopic Characterization Of Productmentioning

confidence: 99%

Selective Synthesis, Characterization and Kinetics Studies of poly(α-Methyl styrene) induced by Maghnite-Na+ Clay (Algerian MMT)

Ayat

Belbachir

Rahmouni

2016

Bull. Chem. React. Eng. Catal.

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A new and efficient catalyst of Na-Montmorillonite (Na + -MMT) was employed in this paper for α-methylstyrene (AMS) cationic polymerization. Maghnite clay, obtained from Tlemcen Algeria, was investigated to remove heavy metal ion from wastewater. "Maghnite-Na" is a Montmorillonite sheet silicate clay, exchanged with sodium as an efficient catalyst for cationic polymerization of many vinylic and heterocyclic monomers. The various techniques, including 1 H-NMR, 13 C-NMR, IR, DSC and Ubbelohde viscometer, were used to elucidate structural characteristics and thermal properties of the resulting polymers. The structure compositions of "MMT", "H + -MMT" and "Na + -MMT" have been developed. It was found that the cationic polymerization of AMS is initiated by Na + -MMT at 0 °C in bulk and in solution. The influences of reaction temperature, solvent, weight ratio of initiator/monomer and reaction time on the yield of monomer and the molecular weight are investigated. The kinetics indicated that the polymerization rate is first order with respect to the monomer concentration. A possible mechanism of this cationic polymerization is discussed based on the results of the 1 H-NMR Spectroscopic analysis of these model reactions. A cationic mechanism for the reaction was proposed. From the mechanism studies, it was showed that monomer was inserted into the growing chains.

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“…The A values calculated from the unperturbed dimensions of the parent homopolymers ("ideal" values) using equation (1) [6, [19][20][21] are shown in Table 3. The observed values of A for this copolymers are smaller than the "ideal" values.…”

Section: Unperturbed Dimensionsmentioning

confidence: 99%

Dilute solution properties of alternating copolymers from acrylonitrile and α‐methylstyrene

1993

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Kuhn‐Mark‐Houwink‐Sakurada relations were obtained in various solvents for alternating copolymers from acrylonitrile and α‐methylstyrene. The values of the unperturbed dimension and the conformational parameter were determined using usual extrapolation techniques. The values of the unperturbed dimensions are dependent on the solvent and are quite different from the values calculated on the basis of additivity rules from the unperturbed dimensions of the parent homopolymers.

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Preparation and properties of some poly‐α‐methylstyrenes

Cited by 14 publications

References 13 publications

Maghnite‐H⁺, a solid catalyst for the cationic polymerization of α‐methylstyrene

Maghnite‐H⁺, a solid catalyst for the cationic polymerization of α‐methylstyrene

Selective Synthesis, Characterization and Kinetics Studies of poly(α-Methyl styrene) induced by Maghnite-Na+ Clay (Algerian MMT)

Dilute solution properties of alternating copolymers from acrylonitrile and α‐methylstyrene

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Preparation and properties of some poly‐α‐methylstyrenes

Cited by 14 publications

References 13 publications

Maghnite‐H+, a solid catalyst for the cationic polymerization of α‐methylstyrene

Maghnite‐H+, a solid catalyst for the cationic polymerization of α‐methylstyrene

Selective Synthesis, Characterization and Kinetics Studies of poly(α-Methyl styrene) induced by Maghnite-Na+ Clay (Algerian MMT)

Dilute solution properties of alternating copolymers from acrylonitrile and α‐methylstyrene

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Product

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Maghnite‐H⁺, a solid catalyst for the cationic polymerization of α‐methylstyrene

Maghnite‐H⁺, a solid catalyst for the cationic polymerization of α‐methylstyrene