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.

Modeling the free radical solution and bulk polymerization of methyl methacrylate

1985 ◽  
Vol 30 (10) ◽  
pp. 3985-4012 ◽  
Author(s):  
Brian M. Louie ◽  
Gregory M. Carratt ◽  
David S. Soong
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
Bulk Polymerization ◽  
Radical Solution

scholarly journals Effect of temperature on initial stage of methyl methacrylate free radical bulk polymerization

2010 ◽  
Vol 64 (6) ◽  
pp. 503-510
Author(s):  
Vladislav Jaso ◽  
Dragoslav Stoiljkovic ◽  
Radmila Radicevic
Keyword(s):  
Experimental Data ◽  
Free Radical ◽  
Methyl Methacrylate ◽  
Radical Polymerization ◽  
Free Radical Polymerization ◽  
Bulk Polymerization ◽  
Effect Of Temperature ◽  
Scanning Calorimetry ◽  
Initial Stage ◽  
Classic Theory

Classic theory of free radical polymerization is based on two assumptions. The first is that the concentration of initiator is slightly changed and could be taken as a constant value. The second assumption is that the rate of initiation is equal to the rate of termination. Equation for the polymerization rate based on these assumptions can not successfully describe the initial stage of free radical polymerization. In order to solve this problem, three mathematical models were developed and used to verify of the mentioned assumptions. The models were fitted to experimental data and qualities of their fits were compared. Experimental data of isothermal bulk polymerization of methyl methacrylate were obtained by differential scanning calorimetry at 60, 70, 80 and 90?C with initiator concentration (AIBN) of 0.5 wt%. The best fit was shown by the model that assumes constant concentration of initiator during initial stage but takes into account that the rate of initiation is not equal to the rate of termination at the beginning.

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.

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