Polymer solution characterization - Part 1. "Absolute" molecular weight - fact or fiction?

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00:00:00 Polymer Solution Characterisation - Part 1. "Absolute" molecular weight - fact or fiction?
00:04:45 Absolute molecular weight – fact or fiction?
00:06:11 Polymer is a composite of the Greek words poly and meros, meaning “many parts.”
00:07:04 Molecular weight
00:08:10 Polymer molecular weight - Polystyrene
00:08:54 Molecular weight
00:09:39 Molecular weight
00:11:30 Classical Determination of MW
00:13:08 Osmometry
00:15:24 End group analysis
00:16:43 Viscosity
00:18:41 Other Methods for Molecular Weight Determination
00:20:06 Light Scattering
00:21:21 Static light scattering theory
00:22:17 Anisotropic scatterers and angular dependence
00:23:26 Accounting for anisotropic scattering
00:25:10 Right-angle light scattering (RALS)
00:25:48 Low-angle light scattering
00:25:53 RALS/LALS
00:26:28 Multi-angle light scattering
00:27:20 The 3 approaches in plain English
00:28:10 Batch vs GPC/SEC measurement
00:29:48 Batch measurements
00:31:26 GPC/SEC - The beginnings of the technique
00:34:06 GPC/SEC - Detection and Calibration strategies(1) Conventional Calibration
00:35:37 GPC/SEC - Detection and Calibration strategies
00:36:56 GPC/SEC - Detection and Calibration strategies(2) Universal Calibration
00:38:32 Detection and Calibration strategies(3) Light Scattering Calibration
00:39:32 Absolute molecular weight?
00:40:28 GPC/SEC and GPC/SEC with Light Scattering
00:42:36 Absolute molecular weight?
00:52:10 Contact Information

The measurement of the "absolute" molecular weight (or molar mass) of polymers and proteins is often mentioned and referenced but what does it mean? This talk will present a summary of the solution techniques available for measurement of molecular weight and discuss how "absolute" they can be considered to be. The focus will be on light scattering techniques, both in batch mode and when incorporated with chromatography systems.