Investigation on solidification behaviour of high-density polyethylene during thin-walled injection moulding: correlation between crystallisation kinetics and thermal gradient field
| Autor: | Peng Chen, Ming-Bo Yang, Li-Feng Su, G.-J. Li, Jibin Miao, Ru Xia, Jiasheng Qian, Jing-Wang Liu, Shi You, Bin Yang |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics General Chemical Engineering 02 engineering and technology Polyethylene 010402 general chemistry 021001 nanoscience & nanotechnology Thermal conduction 01 natural sciences 0104 chemical sciences law.invention chemistry.chemical_compound Temperature gradient Crystallinity chemistry law Heat transfer Materials Chemistry Ceramics and Composites Injection moulding High-density polyethylene Crystallization Composite material 0210 nano-technology |
| Zdroj: | Plastics, Rubber and Composites. 45:398-406 |
| ISSN: | 1743-2898 1465-8011 |
| Popis: | The influence of temperature fields on the crystallisation kinetics of high-density polyethylene during injection moulding was disclosed in this work. The dimensionless X = 0.4 along the part thickness was a critical location, within which the heat transfer of polymer was primarily affected by thermal conduction. When X > 0.4, the decay in temperature tended to become stable with limited variation in t1/2−1 value (an indicator of average crystallisation rate). The experimental results indicated that the crystallisation rate was proportional to the cooling speed, regardless of the cooling conditions utilised. The sequence of relative crystallinity was in consistence with that of secondary temperature difference. The present study will be of practical significance to further investigation on the ‘processing–structure–property’ relationship for polymeric materials. |
| Databáze: | OpenAIRE |
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