Polymer branching is an important molecular parameter since it affects various macroscopic polymer properties such as crystallinity, melting temperature, toughness, ductility, and optical clarity.1-2 Two types of branching are recognized: long-chain branching (LCB) wherein the molar mass of the branches is greater than the entanglement molar mass, and short-chain branching (SCB) wherein the molar mass of the branches is smaller than the entanglement molar mass.

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DAWN®

DAWN®

The world’s most advanced light scattering instrument for absolute characterization of proteins, conjugates, macromolecules, and nanoparticles.

The DAWN and its companion Optilab dRI detector are the established benchmarks for MALS analysis, cited in thousands of peer-reviewed publications. Multi-angle light scattering detection is indispensable for use with GPC and HPLC-SEC in order to obtain reliable molecular mass distributions and information on molecular conformation, branching ratio, fragments and aggregates.

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Optilab

Optilab

Universal Detection for Chromatography and FFF Separations

Using a combination of cutting-edge semiconductor photodiode technology and proprietary computer algorithms, the Optilab achieves an unprecedented combination of sensitivity and range. These features mean that it addresses both standard chromatographic applications and some challenges unique to light scattering measurements such as high concentrations, determination of sample refractive increments (dn/dc) and solvent refractive index.

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