GPC-IR coupled system separates copolymer samples or polymer mixtures according to their hydrodynamic sizes (Molecular Weight Distributions) and then continuously takes FTIR snapshot pictures of polymer chemical compositions (Chemical Compositional Distributions) at each MW slice after the solvent removal and a controlled film deposition on ZnSe disc. The high-quality IR spectra are database searchable for identification (de-formulation) and can be processed with GRAMS software for many applications including 3D GPC-IR spectrum mapping (CCD vs. MWD), copolymer compositional analysis across MWD, polymer blend ratio analysis and polymer degradation study. The system is compatible with GPC or HPLC with all solvents and solvent gradients, including highly corrosive HFIP solvent for high performance plastics and TCB solvent at high temperature (150C) for polyolefin products.Three case studies will be presented to illustrate GPC-IR capabilities to de-formulate complex polymer mixtures for competitive analysis, IP protection and analytical trouble-shooting in polymer-related industries.(1)   De-formulated a hot melt adhesive involved with 3 different polymers (EVA, glycerol ester rosin and paraffin) for adhesive industry.(2)   De-formulated a flexible conductive ink involved with 3 different polymers for ink industry.(3)   De-formulated a lubricant oil formula involved with two copolymer additives (PIBS and styrene-acrylate copolymer) for specialty chemical industry.

De-formulating complex polymer mixtures by GPC-IR coupled system

243rd National Meeting (2012)

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