ChemInform Abstract: Preparation of 2-Substituted Naphth[2,3-d]oxazole-4,9-diones via a Radical Chain Process.

ChemInform ◽  
2010 ◽  
Vol 31 (34) ◽  
pp. no-no
Author(s):  
Pascal Rathelot ◽  
Yves Njoya ◽  
Jose Maldonado ◽  
Michel P. Crozet ◽  
Patrice Vanelle
Keyword(s):  
Chain Process ◽  
Radical Chain ◽  
Radical Chain Process

scholarly journals Studies in polymerization - III. The polymerization of methyl methacrylate

1949 ◽  
Vol 197 (1050) ◽  
pp. 356-373 ◽  
Keyword(s):  
Methyl Methacrylate ◽  
Ultra Violet ◽  
Vapour Phase ◽  
Thermal Reaction ◽  
Chain Process ◽  
Radical Chain ◽  
Violet Light ◽  
Normal Radical ◽  
Bond Mechanism ◽  
Radical Chain Process

The polymerization of methyl methacrylate has been studied by the viscosity method (part I, 1948). The reaction is shown to be a normal radical chain process with velocity constants at 0°C given in table 3. It has been found that irradiation of methyl methacrylate by ultra-violet light produces a catalyst, while an inhibitor is formed by a thermal reaction. These facts account for the difficulties experienced by other workers. A reinvestigation of the vapour-phase polymerization shows that they also account for the anomalous polymerization observed by Melville (1937), and attributed by him to a ‘bound-bond’ mechanism. Chain termination in the polymerization of styrene and methyl methacrylate is shown to occur by disproportionation.

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