Modules for WinGPC Unity:Light Scattering, Viscometry, 2D Chromatography, Chemical Heterogeneity and Copolymer Analysis

Advanced Characterization, Deformulation and Structure Determination with Multiple Detectors

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Modules for Light Scattering Examples of light scattering measurements   WinGPC Unity offers two light scattering modules which main difference is the number of supported angles. For applications that can be restricted to a single angle the LS module is the suitable choice for any RALLS or LALLS instrument. Validated light scattering data evaluation yields absolute and reliable measurement of all molar mass averages and their distribution, including dn/dc or recovery determination. The light scattering module for multi angles   brings the previous features as well as the following additional information: molecular size (Rg) and its distribution evaluated with Zimm’s, Debye’s or Berry’s method, degree of branching and structure coefficients. WinGPC Unity allows to monitor up to 18 different angles and 6 auxiliary analog signals from RI, UV or viscometer at the same time Module for Viscometry Viscometry and branching The viscosity module supports all viscometers regardless of manufacturer or design principle (e.g. single or dual capillary, asymmetric or symmetric bridge). Viscometers directly measure intrinsic viscosity without relying on assumptions. Validated and proprietary viscometry data processing methods derive true molecular weights and reliable Mark-Houwink constants based on the universal calibration principle. The branching index g’ can be measured across the molar mass distribution. Module for 2D Chromatography Contour Map and 3-D views The 2D analysis software module combines the separation power of two different chromatographic methods (HPLC, SEC/GPC, TREF, IC, CE, GC). This results in a dramatical enhancement of resolution and peak capacity as well as in-depth information on complex products. All kinds of detectors can be used in both dimensions. Data acquisition and control of the fraction transfer between dimensions is fully automated. Multiple views of raw and consolidated data, like 3D surface plots or contour maps, are available. WinGPC Unity is the only software that determines and quantifies multiple property distributions simultaneously.

Module for Chemical Heterogeneity The chemical heterogeneity software module calculates the chemical composition, the skew and width of the compositional distribution based on HPLC-type separations (Polymer-LC, GPEC). It relies on a composition calibration of the chromatography time base. This calibration can be done either with standards of known composition or via multiple detection (Copolymer Analysis module)..

Module for Copolymer Analysis Styrene Copolymers The copolymer analysis software module calculates the average chemical composition, the comonomer distribution and the copolymer average molecular weights. It uses multiple detectors in SEC/GPC separations. This data processing method needs at least two independent concentration signals for the automatic determination. It relies on the calibration of the individual signal responses to measure comonomer concentration in an absolute way.