記録された日時: June 24 2014

Duration: 50 minutes 12 seconds

Most scientists can easily understand polymer molecular weight differences but often intrinsic viscosity, a harder concept to grasp, is a more useful measure of a polymer in solution. This webinar describes in simple terms what intrinsic viscosity is, how it can be measured and why it is the best way to assess the structure and quantify the branching of polymers in solution by GPC/SEC. We include a clear comparison between structural information from radius of gyration and intrinsic viscosity measurements, including how branching number and frequency are calculated. The talk is illustrating with worked examples of both synthetic polymers such as polyethylene and polysaccharides such as hyaluronic acid.

Table of contents
1. Polymer solution characterization - Part 3. Branching out! - Intrinsically useful views on polymer structure.
01:04
2. Polymer solution characterization - Part 3. Branching out! - Intrinsically useful views on polymer structure.
00:24
3. Polymer solution characterisation - Part 3: Branching out!Intrinsically useful views on polymer structure
01:05
4. Molecular weight summary
00:43
5. Determining molecular size - summary
00:46
6. Solution viscosity measurement
01:56
7. Intrinsic viscosity – [η]
02:24
8. Intrinsic viscosity – [η]
01:55
9. Relation between polymer structure and intrinsic viscosity
02:56
10. How is intrinsic viscosity measured?
00:43
11. Traditional measurement
01:56
12. Huggins/Kraemer Plot
00:26
13. Two-capillary viscometer – Baseline/Load
01:12
14. Analysis
01:02
15. Advanced GPC/SEC Configuration
00:44
16. Four-capillary viscosity detector
02:14
17. Mark-Houwink relationship
00:58
18. Linear MH plot example – Polystyrene in THF (NBS706)
00:59
19. Difference in Mark Houwink a value for high and low molecular weight polystyrene
00:56
20. Mark-Houwink plots – different polymer types
01:31
21. Maltodextrin: Same polymer, different branching
01:43
22. Calculation of branching – Zimm Stockmayer
01:20
23. Rg measured by MALS
01:25
24. Angular dependence in PS235k
01:03
25. Pectin
00:39
26. Calculation of branching – Zimm Stockmayer
01:22
27. Comparison of IV and Rg for structure
01:34
28. Branching analysis – a worked example
00:41
29. Comparison of NBS 1475 (Linear) and 1476 (Branched) using M-H plot
01:14
30. Reproducibility determined by Mark Houwink plot
01:06
31. Determination of LCB – Interactive branching view
00:45
32. Long-Chain Branching Parameters
01:27
33. Untitled
02:09
34. Branching calculation example: Dextran
01:17
35. Dextran - branching frequency comparison
01:18
36. Summary
00:39
37. Branching out!
03:53
38. Contact Information
00:43