Abstract
Copolymer end-use properties depend critically on both molecular weight distribution and comonomer composition distribution. Tolerance of variations of compositional drift can be very small in certain applications. While it is relatively easy to measure bulk composition, it requires special methods to map compositional drift. This article describes instrumentation that interfaces infrared spectrometry to liquid chromatography and the data processing techniques employed to characterize the compositional variation of copolymers. An example provides a demonstration of this technique. The technique provides value both to the polymer engineer producing a product and to end users of polymer products.
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