Compositional analysis of the styrene–isobutylene copolymer



Analysis for composition of the styrene–isobutylene copolymer has been accomplished by independent techniques which include carbon-hydrogen analysis and infrared and NMR spectroscopy. The use of blends of homopolymers presents difficulties in establishing true absorptivities for the solution of two-component systems, and appropriate corrections were applied to enable use of IR as an analytical technique. Carbonhydrogen elemental analysis and NMR spectroscopy were used to verify the IR results.