| 00:00:00 | Interpretation of the viscoelastic spectrum – A three part series. PART 1 |
| 00:03:35 | Viscoelastic Spectrum, Part 1 |
| 00:04:03 | Dynamic Viscoelastric Spectrum |
| 00:05:30 | Relaxation Spectrum |
| 00:05:49 | Continuous functions of amorphous structures |
| 00:06:45 | Definition of terms |
| 00:07:28 | Stochastic Geometry |
| 00:08:04 | Random Coil Model of Polymer Chains |
| 00:08:56 | Diamond and graphite crystal structures |
| 00:09:55 | Primacy of short range order |
| 00:10:16 | Free volume of fluids |
| 00:11:06 | Chain dynamics, reptation model, equilibrium state |
| 00:11:48 | Solid-solid transitions below Tg |
| 00:12:12 | Secondary Transition types of motions |
| 00:12:39 | Secondary Transitions from Side Groups |
| 00:13:12 | Rotation of Methyl Methacrylate Side Group |
| 00:13:32 | Temperature Dependence of Tan delta PMMA Solid State Transitions |
| 00:13:51 | Temperature-Frequency dependence of G' and G" |
| 00:14:56 | Temperature-Frequency dependence of secondary and glass transition |
| 00:15:17 | C13 NMR Spin-Lattice relaxation |
| 00:16:11 | Temperature Dependence of Tan Delta of Methylacrylate Polymers |
| 00:17:10 | Temperature Dependence of NMR spin-lattice relaxations of polymethyl-acrylates |
| 00:18:13 | Transition map of PMMA |
| 00:18:38 | Activation enthalpies of PMMA transitions |
| 00:19:00 | Diffusion measurements |
| 00:19:55 | Yield stress equation |
| 00:20:30 | Oritical and experimental comparisons |
| 00:21:04 | Semicrystalline Polymers |
| 00:22:07 | Polyolefins |
| 00:22:41 | Comparison Between Amorphous and Crystalline Polymers |
| 00:23:26 | Comparison of LDPE, PP, & PB-1 |
| 00:24:06 | Crystalline Transitions, alpha’c |
| 00:24:42 | Two-site Folding Chain Model and Energy Barrier |
| 00:25:20 | Temperature Dependence of storage and loss moduli of HDPE samples |
| 00:26:09 | Low temperature damping curves of HDPE |
| 00:26:24 | Dart impact strength of HDPE samples |
| 00:26:51 | Dependence of Impact Strength on Tan Delta |
| 00:27:39 | Trouser Tear of Plastic Film |
| 00:28:07 | Ethylene-Hexene Copolymer |
| 00:28:26 | Temperature dependence of DMA storage moduli of LLDPE samples |
| 00:28:44 | Temperature Dependence of DMA tandelta of LLDPE |
| 00:29:02 | Comparison to tear strength of LLDPE films and oxygen diffusion |
| 00:29:45 | Effect of density on the GTR and tear strength of Octane1 LLDPE |
| 00:30:30 | Morphology of linear low density polyethelene |
| 00:30:52 | orientation of stretched LLDPE |
| 00:31:51 | Polybutene-1 Fibers' morphology |
| 00:32:26 | Crystal and amorphous orientation vs draw ratio of fibers |
| 00:33:36 | High tenacity and elastic hard polybutene-1 fiber |
| 00:34:00 | Comparison of tensile properties of unoriented and oriented polybutene-1 |
| 00:34:46 | Increase in void volume of LDPE by stretching |
| 00:35:13 | DMA of oriented and unoriented polybutene-1 fibers |
| 00:35:38 | DMA of oriented and unoriented polybutene-1 fibers |
| 00:36:11 | Viscoelastic Spectrum, Part 2 |
| 00:36:27 | Contact details |
This first seminar will discuss the universal viscoelastic spectrum. The spectrum can be divided into three regions. In general, the significance of these regions gives valuable information in terms of the size of a flow unit, molecular interactions, and identifies small molecular segments within the flow units.