Experimental and numerical investigation of warpage of semicrystalline polymers in rotational molding
| Autor: | Åge Larsen, Erik Andreassen, Espen Ommundsen, T. Glomsaker |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
chemistry.chemical_classification
Materials science Polymers and Plastics Computer simulation General Chemistry Polymer Polyethylene Rotational molding law.invention Linear low-density polyethylene chemistry.chemical_compound Crystallinity Thermoelastic damping chemistry law Polymer chemistry Materials Chemistry Crystallization Composite material |
| Zdroj: | Polymer Engineering & Science. 45:945-952 |
| ISSN: | 1548-2634 0032-3888 |
| DOI: | 10.1002/pen.20348 |
| Popis: | Warpage of various semicrystalline polyethylenes (linear low density polyethylene [LLDPE]) has been investigated under typical rotational molding conditions, which means slow cooling from only one side. We have developed an experimental technique that is able to quickly rate different materials with respect to warpage under typical process conditions. We have also developed a numerical model simulating the experiments assuming a thermoelastic material including crystallization. As has been observed in practical rotational molding, it has been found in both experiments and simulations that materials with high crystallinity have in general higher warpage. The simulations also showed that the crystallization kinetics has implications on the warpage because the crystallinity gradient during solidification depends on the rate of crystallization. POLYM. ENG. SCI., 45:945–952, 2005. © 2005 Society of Plastics Engineers |
| Databáze: | OpenAIRE |
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