Please reserve a seat and a complimentary gift for me at the upcoming 2012 Spring ACS Advanced Polymer Characterization Workshop:

Monday, March 26, 2012
8:30 am - 11:00 am
San Diego Convention Center, Exhibitor Hall B2, Room 1


You will receive a confirmatory email once your reservation is received.


8:30 am – 9:15 am
A new class of photoresponsive polymers that undergo controlled and complete polymer chain scission at 300 nm
Abraham Joy, Ph.D., Assistant Professor of Polymer Science, University of Akron
Stimuli responsive materials are of interest in a number of applications. Of these, photoresponsive materials have a unique advantage since their response can be temporally controlled. We have developed a series of photodegradable phenacyl based polycarbonates. Hydroxyphenacyl, developed by Givens and coworkers, has been demonstrated to be a very efficient photoactivated protecting group for the release of esters, phosphates and thiols. We have incorporated this photoactive unit in the polymer backbone and irradiation at 300 nm leads to polymer chain scission that results in substantial decrease in molecular weight. These polymers undergo photoinitiated degradation in both solution and the solid state. Well defined 2D patterns can be formed from films of these polymers by the use of simple masks. These polymers also have the potential for controlled release applications. Release of rhodamine 6G and indomethacin will be demonstrated using films of these polymers..

9:15 am – 9:45 am
Improved GPC Performance from Multiple Pore Size Chromatography Particle Technology and an Excel-based Column Selection Tool
Joe Machamer, GPC Marketing Manager, Tosoh Bioscience LLC
An approach to solve the linearity problems of mixed bed and multiple columns of different pore sizes linked together was developed by Tosoh scientists and is incorporated in TSK-GEL SuperMultiporeHZ Series columns. These columns are packed with small particles of uniform size and synthesized with a broad distribution of pore sizes. This novel approach creates a linear calibration curve within each particle. Therefore, columns with an extended linear calibration curve can now be prepared without mixing particles of different pore sizes. Their small ID (4.6mm) and length (15cm) reduces solvent consumption and results in quick run times, and offers high throughput capabilities.

Tosoh Bioscience has developed an Excel-based tool to plot calibration curves for various combinations of column pore size distributions. Benefits include accurate prediction of the behavior of combinations of mixed bed columns with individual pore size columns and trade-offs between run time and resolution.
9:45 am – 10:30 am
Bridging the gap in polymer characterization: Single- and multi-detector SEC
Amandaa Brewer, Ph.D., GPC Technical Specialist, Tosoh Bioscience LLC
Since its inception, the principle use of size exclusion chromatography (SEC) has been to determine the molar mass averages and distributions of natural and synthetic polymers. In general these properties have been characterized through the application of calibration curves via single-detector instrumental set-ups, e.g. SEC-refractive index (RI). Over the years as the complexity of polymers has increased, the ability to obtain accurate and precise distributions of both their physical and chemical properties have piloted a new era of polymer analysis: multi-detector SEC.

In this presentation polymer characterization via single- and multi-detector SEC, namely the coupling of SEC to various combinations of RI, UV-Vis, multi-angle light scattering (MALS), and differential viscometry (VISC), will be discussed. A dual detector system composed of two concentration-sensitive detectors allows for chemical composition determination of copolymers. While the addition of a MALS detector to a single-detector SEC system allows for the determination of not only the absolute, calibrant-independent, molar mass and molar mass distributions but also provides size information. When coupled to the SEC-MALS-RI, a viscometer can provide molar mass averages and distributions via universal calibration in addition to the intrinsic viscosity and macromolecular size of the analyte. Lastly, an overview of both multi-detector technologies as well as applications of natural and synthetic polymers will be provided.
10:30 am – 11:00 am
Characterizing Copolymers with GPC-IR
Tom Kearney, Spectra Analysis Instruments, Inc.
Progress in desolvation and deposition technologies now permit hyphenating Infrared Spectroscopy to Liquid Chromatography. This advancement offers an unparalleled solution for rapid, economical Real-Time On-Line detection and identification of polymer and copolymers systems. GPC-IR takes snapshot pictures of polymer chemical compositions at each molecular weight after GPC size separation of copolymers or polymer mixtures. The high-quality IR spectra are database searchable for identification (de-formulation) and can be analyzed with GRAMS software for multiple applications including 3D GPC-IR spectrum mapping, copolymer compositional analysis across MW distributions, polymer degradation study, polymer blend ratio analysis and complex mixture deformulation. In this event, spectroscopy and polymer expert will discuss these applications through 2 cases studies:

• Copolymer compositional analysis across MW distributions: SBR rubber and PVP/VA Copovidone.
• Polymer blends and mixtures deformulation: e.g. lubricant oil additives & EVA/PBMA hot melt adhesive.

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