Study on tensile properties constitutive model of polyurethane fibers with different isocyanate index
| Autor: | Gexin You, Xiri Chen, Xiuwen Zhou, Bo Yang, Xinsen Liu |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Polymers and Plastics Constitutive equation Metals and Alloys Modulus Isocyanate Dashpot Surfaces Coatings and Films Electronic Optical and Magnetic Materials law.invention Biomaterials chemistry.chemical_compound chemistry law Ultimate tensile strength Fourier transform infrared spectroscopy Composite material Polyurethane Pyrometer |
| Zdroj: | Materials Research Express. 5:065302 |
| ISSN: | 2053-1591 |
| Popis: | In this study, a two-element model consisting of a non-linear spring and a viscous dashpot was proposed to simulate tensile curve of polyurethane fibers. The results showed that the two-element model can simulate the tensile curve of the polyurethane fibers better with a simple and applicable feature compared to the existing three-element model and four-element model. The effects of isocyanate index (R) on the hydrogen bond (H-bond) and the micro-phase separation of polyurethane fibers were investigated by Fourier transform infrared spectroscopy and x-ray pyrometer, respectively. The degree of H-bond and micro-phase separation increased first and then decreased as the R value increased, and gain a maximum at the value of 1.76, which is in good agreement with parameters viscosity coefficient ? and the initial modulus c in the model. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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