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High-performance liquid chromatography complex polymers

In the next section, the term "complex polymers" is defined, the effects of polymer complexity on conventional SEC analysis are examined, and attempts to analyze ccanplex polymers by utilizing SEC detector technology are summarized. High performance liquid chromatography (HPLC) attempts to accomplish the task are then described. This is followed by a summary of the theoretical development of OC, experimental results of OC analysis, complications which emerged, and finally a summary of the status of OC in light of recent developments. (1) and (2) provide reviews of OC. [Pg.60]

Attenpts to Analyze Complex Polymers by High Performance Liquid Chromatography (HPLC)... [Pg.62]

Gradient high-performance liquid chromatography (HPLC) has been useful for the characterization of copolymers (14-19). In such experiments, careful choice of separation conditions is a conditio sine qua non. Otherwise, low resolution for the polymeric sample will obstruct the separation. However, the separation in HPLC, dominated by enthalpic interactions, perfectly complements the entropic nature of the SEC retention mechanism in the characterization of complex polymer formulations. [Pg.227]

Modern high-performance liquid chromatography (HPLC) is a versatile analytical technology that can provide a range of essential information about the soluble components of plastics, including the base polymer, the formulated resin, and the additives. All modes of HPLC use a column packed with materials to separate species in a complex mixture. In some modes of HPLC the separation is based on differences in chemical composition or selectivity. The mode of HPLC that is most familiar to polymer analysts is gel permeation chromatography (GPC). It is also termed size-exclusion chromatography (SEC). [Pg.553]

On the other hand, high-performance liquid chromatography (HPLC) is an important tool for the fast separation of complex polymers with regard to chemical composition. HPLC separations can be achieved via different mechanisms, including adsorption-desorption and precipitation-redissolution. In gradient HPLC, precipitation and adsorption processes are frequently combined. [Pg.112]

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See also in sourсe #XX -- [ Pg.62 , Pg.64 ]



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