Copolymers of 2,5-bis[(4-methoxyphenyl) oxycarbonyl]styrene with styrene and methyl methacrylate: Synthesis, monomer reactivity ratios, thermal properties, and liquid crystalline behavior

2005 ◽  
Vol 43 (12) ◽  
pp. 2666-2674 ◽  
Author(s):  
Yong-feng Zhao ◽  
Yi Yi ◽  
Xinghe Fan ◽  
Xiaofang Chen ◽  
Xinhua Wan ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Methyl Methacrylate ◽  
Liquid Crystalline ◽  
Reactivity Ratios ◽  
Monomer Reactivity Ratios

scholarly journals Preparation and modification of itaconic anhydride-methyl methacrylate copolymers

2007 ◽  
Vol 72 (12) ◽  
pp. 1507-1514 ◽  
Author(s):  
Milos Milovanovic ◽  
Snezana Trifunovic ◽  
Lynne Katsikas ◽  
Ivanka Popovic
Keyword(s):  
Free Radical ◽  
Methyl Methacrylate ◽  
1H Nmr Spectroscopy ◽  
Copolymer Composition ◽  
Reactivity Ratios ◽  
Complete Conversion ◽  
Monomer Reactivity Ratios ◽  
Itaconic Anhydride ◽  
Methacrylate Copolymers ◽  
Butyl Amine

The free radical copolymerisation of itaconic anhydride and methyl methacrylate in solution was studied at 60 ?C. The copolymer composition was determined by 1H-NMR spectroscopy and the obtained monomer reactivity ratios were calculated, rITA = 1.35?0.11; rMMA = 0.22?0.22 (by the Fineman-Ross method) and rITA = 1.27?0.38; rMMA = 0.10?0.05 (by the Mayo-Lewis method). The synthesised copolymers were modified by reaction with di-n-butyl amine. The copolymer composition after amidation was determined by elemental analysis via the nitrogen content. Amidation of the anhydride units in the copolymers with di-n-butyl amine resulted in complete conversion to itaconamic acid.

Polymerization behavior of 2,6-dimethoxystyrene

1969 ◽  
Vol 47 (11) ◽  
pp. 2057-2060 ◽  
Author(s):  
W. Y. Lau ◽  
C. M. Burns
Keyword(s):  
Molecular Structure ◽  
Free Radical ◽  
Methyl Methacrylate ◽  
Random Copolymers ◽  
Cross Linking ◽  
Reactivity Ratios ◽  
Monomer Reactivity Ratios ◽  
Polymerization Behavior

Free radical, cationic, and anionic initiators were investigated as possible agents for the polymerization of 2,6-dimethoxystyrene. Polymerization was observed in all three cases, with rapid cross-linking apparently occurring with the cationic catalyst. Attempts at copolymerization with styrene and with methyl methacrylate resulted in the formation of homopolymers of 2,6-dimethoxystyrene, in the cationic cases, and of methyl methacrylate in the anionic cases. Random copolymers were obtained in the anionic case with styrene and in the free radical case with both comonomers. Monomer reactivity ratios were calculated, and the polymerization behavior was interpreted in terms of the molecular structure of 2,6-dimethoxystyrene.

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