Phase-Transfer Catalysis: Free-Radical Polymerization of Methyl Methacrylate using K2S2O8-Quaternary Ammonium Salt Catalyst System. A Kinetic Study

Balakrishnan, T.; Jayachandramani, N.

doi:10.1080/10601329409349762

Cited by 9 publications

(3 citation statements)

References 15 publications

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“…Though both V(V) and Ce(IV) are one electron oxidants, the oxidation potential of Ce(IV) is much higher than V(V) and ceric ion is capable of initiating vinyl polymerization even in the absence of a reducing agent, while V(V) ion is not. Generally, the order with respect to initiator is 0.5 when termination is bimolecular in free radical polymerization processes 15 , and it drops to nearly zero when primary radical termination predominates. The initiator rate exponent of nearly 0.5 confirms bimolecular termination in the present study.…”

Section: Effect Of Monomer Concentration On Polymerization Ratementioning

confidence: 99%

Polymerization of Acrylonitrile Initiated by Cerium(IV) / p-Aminoacetophenone Redox System - A Kinetic Study

2016

Chem Sci Trans

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The kinetics of aqueous polymerization of acrylonitrile initiated by the Ce(IV)/p-aminoacetophenone (Ce(IV) -AAP) redox system in aqueous solution of sulfuric acid medium has been studied under nitrogen atmosphere in the temperature range 30-80 °C. The rate of polymerization (Rp) and the disappearance of Cerium(IV) have been measured at various concentrations of monomer, initiator, activator and sulfuric acid. The temperature dependence of the rate was studied and the activation parameters were computed using Arrhenius plot. A mechanism consistent with the experimental data is proposed and discussed.

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Section: Effect Of Monomer Concentration On Polymerization Ratementioning

confidence: 99%

Polymerization of Acrylonitrile Initiated by Cerium(IV) / p-Aminoacetophenone Redox System - A Kinetic Study

2016

Chem Sci Trans

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“…Applying the general principles of free radical polymerization and steady state hypothesis to the radical species, the rate equation to the present kinetic data can be derived considering the above reaction steps (3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14). …”

Section: Mechanism and Rate Lawmentioning

confidence: 99%

“…Mandal et al [10] studied the kinetics and mechanism of phase transfer catalyst assisted free radical polymerization of styrene at 60°C. Balakrishnan et al reported the kinetics of the free radical polymerization of MMA-K 2 S 2 O 8 coupled with Benzyltriethylammonium chloride (BTEAC) in ethylacetate-water biphase system under unstirred condition [11]. They have also reported a kinetic investigation of PTC catalyzed free radical polymerization of Acrylonitrile using K 2 S 2 O 8 as water soluble initiator in the presence of TMAB, TEAB, and TBAB as the phase transfer catalysts [12].…”

Section: Introductionmentioning

confidence: 99%

Phase Transfer Catalyzed Free Radical Polymerization: Kinetics of Polymerization of Alkyl Methacrylates Using Potassium Peroxomonosulphate/Tetrabutyl Phosphonium Chloride Catalyst System

Balakrishnan

Kumar

2000

Journal of Macromolecular Science, Part A

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The kinetics of phase transfer catalyzed free radical polymerization of alkyl methacrylates (MMA and EMA) using potassium peroxomonosulphate (water-soluble initiator) coupled with phase transfer catalyst viz., tetrabutylphosphonium chloride (TBPC) have been investigated in ethylacetate-water biphase system at 50 ± 0.1°C. The rate of polymerization increased with an increase in the quaternary salt concentration, but showed a tendency to level off at a higher concentration. An increase in peroxomonosulphate concentration also increased the rate of polymerization (R p ). The order with respect to monomer was found to be in unity. A square root order was observed for both peroxomonosulphate and phase transfer catalyst. A suitable

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Synthesis and characterization of new soluble multisite phase transfer catalysts and their catalysis in free radical polymerization of methyl methacrylate aided by ultrasound—A kinetic study

Murugan

Tamizharasu

2011

J of Applied Polymer Sci

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Four different soluble phase transfer catalysts (PTCs) containing single, di, tri, and tetra active sites have been prepared and proved by FT‐IR, 1H NMR, 13C NMR, mass, elemental analysis, and conductivity measurement. The presence of the number of active sites in each catalyst was also been confirmed by determining their rate of polymerization of methyl methacrylate (MMA) using potassium peroxydisulfate (PDS) as a water soluble initiator in biphase medium. The comparative study reveals that the Rp of MMA determined in the presence of PTC combined with ultrasound has shown twofold enhancement in the activity than PTC alone. The observed order of activity was found to be of single‐site < di‐site < tri‐site < tetra‐site. Further, the thorough kinetic study of free radical polymerization of MMA has been investigated using superior tetra site viz., HBTAMPDTC and by varying the experimental parameters such as [MMA], [K2S2O8], [MPTC], and the temperature. Based on the observed kinetic results and activation parameters, a suitable mechanism was proposed. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012

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Phase-Transfer Catalysis: Free-Radical Polymerization of Methyl Methacrylate using K₂S₂O₈-Quaternary Ammonium Salt Catalyst System. A Kinetic Study

Cited by 9 publications

References 15 publications

Polymerization of Acrylonitrile Initiated by Cerium(IV) / p-Aminoacetophenone Redox System - A Kinetic Study

Polymerization of Acrylonitrile Initiated by Cerium(IV) / p-Aminoacetophenone Redox System - A Kinetic Study

Phase Transfer Catalyzed Free Radical Polymerization: Kinetics of Polymerization of Alkyl Methacrylates Using Potassium Peroxomonosulphate/Tetrabutyl Phosphonium Chloride Catalyst System

Synthesis and characterization of new soluble multisite phase transfer catalysts and their catalysis in free radical polymerization of methyl methacrylate aided by ultrasound—A kinetic study

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