Vinyl polymerization of acrylonitrile by the cerium(IV)-propane-1,2-diol system

Mohanty, N.; Pradhan, B.; Mohanta, M. C.

doi:10.1016/0014-3057(79)90025-9

Cited by 31 publications

(4 citation statements)

References 8 publications

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“…Several reports describe the mechanism of polymerizations using cerium compounds in combination with alcohols, , diols , and polyols . Only in a limited number of kinetic studies was the concentration of cerium ions measured during the polymerization reaction.…”

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confidence: 99%

Flow-Through Cell for On-Line Amperometric Determination of Ce(IV) during Polymerization Reactions

et al. 2002

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In this paper, a method is described for the chronoamperometric determination of Ce(IV) in acidic aqueous solutions in order to study the kinetics and the mechanism of polymerization reactions with Ce(IV) as the initiator. The method is based on the FIA principle, in which small samples are injected in a continuous 1.0 mol L(-1) H2SO4 flow, and Ce(IV) is detected chronoamperometrically by reduction at the surface of a gold CDtrode. Such an electrode is made from a commercial CD that has a gold coating acting as a reflecting layer for the laser beam. It was found that a detection limit of 1.5 10(-7) mol L(-1) could be obtained with this method, that high concentrations (order of 10(-2) mol L(-1)) can be detected without IR drop and that the system can be used over several days without renewal or recalibration of the gold CDtrode.

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confidence: 99%

Flow-Through Cell for On-Line Amperometric Determination of Ce(IV) during Polymerization Reactions

et al. 2002

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“…The 3). The consistent decrease of Rp with increase of [Ce(IV)] rules out the preference for mutual termination and points to the possibility of a linear mode of termination as a major process [11]. The rate of polymerization increased linearly with increasing substrate (Glucose) concentration.…”

Section: Rate Of Polymerizationmentioning

confidence: 97%

Vinyl polymerization of acrylonitrile by the Ce(IV)-glucose redox system

Padhi

Singh

1983

Colloid & Polymer Sci

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“…Ce(IV) salts in aqueous acidic solution either by themselves6 or in combination with reducing agents7 are well‐known initiators for vinyl polymerization. The reducing agent may be alcohols,8 polyols,9 ketones,10 amino acids,11 amines,12 and so forth. The resulting polymers were suggested to have chain ends of a corresponding reducing agent moiety.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of amphiphilic block copolymer of polyacrylonitrile‐block‐poly(ethylene oxide)

Sui

2003

J of Applied Polymer Sci

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ABSTRACT:The synthesis of polyacrylonitrile-block-poly-(ethylene oxide) (PAN-b-PEO) diblock copolymers is conducted by sequential initiation and Ce(IV) redox polymerization using amino-alcohol as the parent compound. In the first step, amino-alcohol potassium with a protected amine group initiates the polymerization of ethylene oxide (EO) to yield poly(ethylene oxide) (PEO) with an amine end group (PEO-NH 2 ), which is used to synthesize a PAN-b-PEO diblock copolymer with Ce(IV) that takes place in the redox initiation system. A PAN-poly(ethylene glycol)-PAN (PAN-PEG-PAN) triblock copolymer is prepared by the same redox system consisting of ceric ions and PEG in an aqueous medium. The structure of the copolymer is characterized in detail by GPC, IR, 1 H-NMR, DSC, and X-ray diffraction. The propagation of the PAN chain is dependent on the molecular weight and concentration of the PEO prepolymer. The crystallization of the PAN and PEO block is discussed.

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Vinyl polymerization of acrylonitrile by the cerium(IV)-propane-1,2-diol system

Cited by 31 publications

References 8 publications

Flow-Through Cell for On-Line Amperometric Determination of Ce(IV) during Polymerization Reactions

Flow-Through Cell for On-Line Amperometric Determination of Ce(IV) during Polymerization Reactions

Vinyl polymerization of acrylonitrile by the Ce(IV)-glucose redox system

Preparation and characterization of amphiphilic block copolymer of polyacrylonitrile‐block‐poly(ethylene oxide)

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