COPOLYMERS ON THE BASIS OF (p-CHLOROPHENOXYCARBONYL)-CYCLOPROPYL STYRENE WITH STYRENE AND METHYL METHACRYLATE

Investigation of microstructure of glycidyl methacrylate/a-methyl styrene copolymers by 1D- and 2D-NMR spectroscopy

The copolymers of glycidyl methacrylate/a-methyl styrene were synthesized. The quantitative C{H}-NMR spectroscopy was used to determine the copolymer compositions. The distortionless enhancement by polarization transfer, C-H heteronuclear single quantum coherence and total correlation spectroscopy were used for the complete spectral assignment of C{H}and H-NMR spectra.

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

Copolymers of a liquid crystalline monomer, 2,5-bis[(4-methoxyphenyl)oxycarbonyl]styrene (MPCS), with St and MMA were prepared by free radical polymerization at low conversion in chlorobenzene with 2,20-azobisisobutyronitrile (AIBN) as initiator. The copolymers of poly(MPCS-co-St) and poly(MPCS-co-MMA) were characterized by H NMR and GPC. The monomer reactivity ratios were determined by using t...

Sulfonation and Characterization of Poly(styrene-isobutylene-styrene) Triblock Copolymers at High Ion-Exchange Capacities

In this study, a triblock copolymer, poly(styrene-isobutylene-styrene), was sulfonated to eight different levels ranging from 0.36 to 2.04 mequiv./g (13 to 82 mol% of styrene; styrene is 19 mol% of the unsulfonated block copolymer). These sulfonated polymers were characterized with elemental analysis and infrared spectroscopy to confirm sulfonation and determine accurate sulfonation levels. Inf...

Synthesis and Characterisation of Styrene Butadiene Styrene Based Grafted Copolymers for Use in Potential Biomedical Applications

In the annals of history the evolution of the synthetic rubber industry can be traced to the early 1930s where the first emulsion polymerised styrene butadiene rubber known as Buna S was prepared by I. G. Farbenindustrie in Germany. But it was not until the US Government in 1940 established the Rubber Reserve Company, a stockpile of natural rubber and the development of a synthetic rubber progr...

Styrene-butadiene-styrene Tri-block Copolymers Modified with Polyhedral Oligomeric Silsesquioxanes