Polymerization of vinyl chloride and copolymerization with propylene by a ternary catalyst system

Akimoto, Akira; Yoshida, Toshirō

doi:10.1002/pol.1972.150100404

Cited by 4 publications

(1 citation statement)

References 15 publications

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“…[24] Moreover, both ethyl acetate and dimethyl sulfoxide have been used as complexing agents with co-catalysts in polymerizations of polar monomers such as vinyl chloride, and methyl methacrylate with Ziegler-Natta type catalysts and their ability to control the polymers' stereoregularity whereby similar polymers as those produced using radical initiators are obtained have been observed. [25,26]…”

Section: Possible Mechanisms Of Poisoningmentioning

confidence: 99%

Impact of Process Poisons on the Performance of Post‐Phthalate Supported Ziegler–Natta Catalysts in Gas Phase Propylene Polymerization

Albeladi

Moman

McKenna

2022

Macro Reaction Engineering

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The impact of common process catalyst poisons on the performance of a 6th generation Ziegler–Natta catalysts during the gas phase polymerization of propylene are examined using two approaches: introducing propylene without purification, or with one or two sets of purification columns, and by introducing carbon dioxide (CO2), oxygen (O2), water (H2O), methanol (CH3OH), ethyl acetate (C4H8O2) and dimethyl sulfoxide (C2H6SO) during the polymerization. As expected, purification columns increases the catalyst activity significantly, slightly reduce catalyst decay. Injecting TiBA during the reaction leads to an activity increase. The addition of two full sets of columns substantially increased the repeatability of polymerization reactions. The power of deactivation of poisons injected during the polymerization reaction is: O2 > CO2 > CH3OH > C2H6SO > C4H8O2 > H2O. Adding CO2, O2, and CH3OH resulted in a progressive decrease in molecular weight while almost no effect is observed with H2O. However, C4H8O2, and C2H6SO resulted in a mild increase in molecular weight. Additionally, the effects on crystallinity and stereoregularity are similar where CO2, O2, H2O and CH3OH caused a progressive decrease while C4H8O2 and C2H6SO resulted in a mild increase, indicating some isotacticity control by these two poisons.

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Section: Possible Mechanisms Of Poisoningmentioning

confidence: 99%

Impact of Process Poisons on the Performance of Post‐Phthalate Supported Ziegler–Natta Catalysts in Gas Phase Propylene Polymerization

Albeladi

Moman

McKenna

2022

Macro Reaction Engineering

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Polymerization of methyl methacrylate with AlEt₃–VOCl₃–dimethyl sulfoxide system

Akimoto

1972

J. Polym. Sci. A‐1 Polym. Chem.

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Random‐coil dimensions and dipole moments of propylene–vinyl chloride copolymers

Mark

1973

J. Polym. Sci. Polym. Phys. Ed.

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Mean‐square unperturbed dimensions 〈r2〉0 and dipole moments 〈μ2〉 have been calculated for propylene–vinyl chloride copolymers by means of rotational isomeric state theory. The calculations indicate that for these chain molecules 〈mu;2〉 is much more sensitive to chemical sequence distribution than is 〈r2〉0, a conclusion in agreement with results of previous studies of ethylene–propylene copolymers and styrene‐substituted styrene copolymers. In the case of propylene–vinyl chloride chains, both 〈r2〉0 and 〈μ2〉 are most strongly dependent on chemical sequence distribution in the case of copolymers which are significantly syndiotactic in stereochemical structure. At equimolar chemical composition, increase in average chemical sequence length generally increases 〈r2〉0 but decreases 〈μ2〉. Under some conditions, values of these statistical properties go through a minimum with increase in the reactivity ratio product r1r2, thus complicating the use of experimental values of these properties in the characterization of chemical sequence distributions in these copolymers.

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Polymerization of vinyl chloride and copolymerization with propylene by a ternary catalyst system

Cited by 4 publications

References 15 publications

Impact of Process Poisons on the Performance of Post‐Phthalate Supported Ziegler–Natta Catalysts in Gas Phase Propylene Polymerization

Impact of Process Poisons on the Performance of Post‐Phthalate Supported Ziegler–Natta Catalysts in Gas Phase Propylene Polymerization

Polymerization of methyl methacrylate with AlEt₃–VOCl₃–dimethyl sulfoxide system

Random‐coil dimensions and dipole moments of propylene–vinyl chloride copolymers

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Polymerization of vinyl chloride and copolymerization with propylene by a ternary catalyst system

Cited by 4 publications

References 15 publications

Impact of Process Poisons on the Performance of Post‐Phthalate Supported Ziegler–Natta Catalysts in Gas Phase Propylene Polymerization

Impact of Process Poisons on the Performance of Post‐Phthalate Supported Ziegler–Natta Catalysts in Gas Phase Propylene Polymerization

Polymerization of methyl methacrylate with AlEt3–VOCl3–dimethyl sulfoxide system

Random‐coil dimensions and dipole moments of propylene–vinyl chloride copolymers

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Polymerization of methyl methacrylate with AlEt₃–VOCl₃–dimethyl sulfoxide system