Synthesis and properties of thermoplastic elastomers based on PTMO and tetra-amide
| Autor: | Reinoud J. Gaymans, D. Husken, J. Krijgsman |
|---|---|
| Přispěvatelé: | Faculty of Science and Technology, Biomaterials Science and Technology |
| Rok vydání: | 2003 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Organic Chemistry Compression set Tetra-amide Polymer IR-74966 Amorphous solid Shear modulus Crystallinity chemistry METIS-217204 Materials Chemistry PTMO Thermoplastic elastomer Composite material Glass transition Supercooling |
| Zdroj: | Polymer, 44(25), 7573-7588. Elsevier |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2003.09.043 |
| Popis: | Segmented copolymers based on T6T6T-dimethyl (two-and-a-half repeating unit of nylon-6,T) and PTMO or extended PTMO1000/DMT that are thermoplastic elastomers were made via polycondensation. The materials have a good solvent resistance, are melt-processable and transparent. The polymers all have a low glass transition temperature (−60 to −0 °C). The rubbery plateau is wide and extremely flat and the melting temperature is sharp and high. The shear modulus of the rubbery plateau (3.3–14.5 MPa) and the flow temperature (183–220 °C) increase with increasing T6T6T content (5–16 wt%), corresponding to increasing crystallinity. The undercooling, as measured by DSC, is 20–30 °C. The compression set at room temperature is low (6–7%) and decreases slightly with decreasing T6T6T content. With AFM it was shown that the crystalline T6T6T units form long threads or ribbon like structures with a high aspect ratio in the amorphous PTMO matrix. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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