Incipient stable bubble formation during bulk polymerization of methyl methacrylate under near-isothermal conditions. II. Use of an anchor agitator

2009 ◽  
Vol 49 (12) ◽  
pp. 2309-2314 ◽  
Author(s):  
Gurpreet J. Singh ◽  
Santosh K. Gupta
Keyword(s):  
Methyl Methacrylate ◽  
Bubble Formation ◽  
Bulk Polymerization ◽  
Isothermal Conditions ◽  
Anchor Agitator

Detailed study on the characterization of silver nanocluster in poly(methyl methacrylate)

1997 ◽  
Vol 501 ◽  
Author(s):  
Naohisa Yanagihara ◽  
Kazutaka Uchida ◽  
Muyuki Wakabayashi ◽  
Toru Hara
Keyword(s):  
Heat Treatment ◽  
Methyl Methacrylate ◽  
Treatment Duration ◽  
Bulk Polymerization ◽  
Visible Spectroscopy ◽  
Poly Methyl Methacrylate ◽  
Silver Nanocluster ◽  
Ag Cluster ◽  
Heat Treatment Duration

ABSTRACTSolid sol of silver in poly(methyl methacrylate), Ag/PMMA, was prepared by bulk polymerization of methyl methacrylate solution of silver (I) triflluoroacetate (AgTfa) and followed by postheating. The formation of the metallic Ag nanocluster was characterized by visible spectroscopy, and effects of the concentrations of AIBN and AgTfa and the heat-treatment duration on the formation of Ag cluster were investigated. Furthermore, based on the kinetic study of MMA in the presence of AgTfa, possible mechanism for the reduction and agglomeration of silver is proposed.

scholarly journals Diffusion of single molecular and macromolecular probes during the free radical bulk polymerization of MMA – towards a better understanding of the Trommsdorff effect on a molecular level

2016 ◽  
Vol 7 (24) ◽  
pp. 4100-4105 ◽  
Author(s):  
Jan Martin Nölle ◽  
Sebastian Primpke ◽  
Klaus Müllen ◽  
Philipp Vana ◽  
Dominik Wöll
Keyword(s):  
Free Radical ◽  
Fluorescence Microscopy ◽  
Methyl Methacrylate ◽  
Molecular Level ◽  
Bulk Polymerization

Diffusional heterogeneities of molecular and macromolecular probes were studied during the radical bulk polymerization of methyl methacrylate using fluorescence microscopy methods.

Effect of Glycerol Carbonate as Plasticizer on P(AN-MMA) Polymer Electrolyte

2015 ◽  
Vol 713-715 ◽  
pp. 2658-2662 ◽  
Author(s):  
Yan An Yuan
Keyword(s):  
Ionic Conductivity ◽  
Methyl Methacrylate ◽  
Polymer Electrolyte ◽  
Room Temperature ◽  
Impedance Measurement ◽  
Lithium Perchlorate ◽  
Bulk Polymerization ◽  
Glycerol Carbonate ◽  
Poly Acrylonitrile ◽  
Copolymer Electrolyte

A kind of new plasticizer glycerol carbonate (GC) was synthesized. The poly (acrylonitrile-methyl methacrylate) (P(AN-MMA)) was prepared by bulk polymerization. During the polymerization, glycerol carbonate with 1M lithium perchlorate (LiClO4) was added to (P(AN-MMA)) to form the gel electrolyte. The effect of the plasticizer on the conductivity of the copolymer electrolyte was studied. The ionic conductivity was found to be 3.3 × 10-4 S·cm-1 at room temperature via AC impedance measurement.

Studies in chain transfer II. Catalyzed polymerization of methyl methacrylate

1952 ◽  
Vol 214 (1117) ◽  
pp. 247-262 ◽  
Keyword(s):  
Methyl Methacrylate ◽  
Benzoyl Peroxide ◽  
Chain Transfer ◽  
Monomer Concentration ◽  
Bulk Polymerization ◽  
Transfer Constant ◽  
Initiation Mechanism ◽  
Low Concentrations ◽  
High Concentrations ◽  
Predicted Values

The chain-transfer reaction between growing methyl methacrylate ( M ) polymer radical and toluene ( S ) when catalyzed by varying quantities of benzoyl peroxide ( B ) at 80 and 60°C and p -nitrobenzoyl peroxide at 80°C has been studied. It has been established that the transfer constant calculated from the slope of 1/ P̄ against S / M curve at constant B / M is not affected by the presence of low concentrations of benzoyl peroxide ( B ), which opens up the possibility of using catalysts for chain-transfer studies. At high concentrations of the catalyst, p -nitrobenzoyl peroxide, the calculated transfer constant has been found to be appreciably altered due to transfer with the catalyst itself. A crucial experimental test of whether the initiation mechanism is unimolecular or bimolecular has been made. In conformity with the deduction from the latter mechanism it has been found that at a constant monomer concentration 1/ P̄ against √( B / M ) plot is linear, and the slope of this line remains unaffected by a change of monomer concentration. On the contrary, the alternative deduction based on unimolecular initiation that 1/ P̄ against √( B / M ) plot should be linear and of equal slope at all monomer concentrations is found inconsistent with experimental data. This strongly supports bimolecular initiation and definitely dis­counts the idea of monomolecular initiation by the catalyst. Four probable mechanisms from literature which are equivalent to a bimolecular mechanism are discussed. A critical test of the whole scheme has been made by calculating D. P. values in bulk polymerization by extrapolation from our data in solution. These extrapolated values are used to construct 1/ P̄ against √( B / M ) curves, and these latter curves are compared with similar curves based on experimentally determined data. A fair degree of concordance between the predicted and the observed values, the predicted values being somewhat lower, is obtained, confirming the essential correctness of the assumed mechanisms of polymeriza­tion and chain transfer.

Raman and FTIR spectroscopy of polymerization: bulk polymerization of methyl methacrylate and styrene

1984 ◽  
Vol 17 (9) ◽  
pp. 1822-1825 ◽  
Author(s):  
Erdogan Gulari ◽  
K. McKeigue ◽  
K. Y. S. Ng
Keyword(s):  
Methyl Methacrylate ◽  
Ftir Spectroscopy ◽  
Bulk Polymerization
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