Description
By combining the VD 400 viscometer and a refractive index detector into a GPC system accurate molecular weight determination is possible based on the universal calibration principle. This is effective for all polymer types synthetic, natural, and bio-polymers to determine true molecular weight and its distribution, size, structure, branching, aggregation without requiring to calibrate the GPC separation columns.
On-line viscometers are used to establish a universal calibration curve for the analysis of:
• polymers where no calibration standards exist
• copolymers
• branched polymers
Besides the molecular weight distribution viscometers additionally provide:
• intrinsic viscosity/specific viscosity
• Mark-Houwink coefficients
• structure information
• branching information
