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https://hdl.handle.net/10119/13786
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| Title: | Effect of crystallization on drawdown force at capillary extrusion for polyethylene |
| Authors: | Seemork, Jiraporn
Itoh, Tomoki
Nobukawa, Shogo
Yamaguchi, Masayuki |
| Keywords: | Elongational Flow
Drawdown force
Polyethylene
Capillary extrusion
Crystallization |
| Issue Date: | 2016-03-18 |
| Publisher: | 日本レオロジー学会 |
| Magazine name: | 日本レオロジー学会誌 |
| Volume: | 44 |
| Number: | 1 |
| Start page: | 23 |
| End page: | 27 |
| DOI: | 10.1678/rheology.44.23 |
| Abstract: | The effect of crystallization on the drawdown force, i.e., the force needed to stretch a molten polymer uniaxially, was studied using conventional polyethylene samples. It was found that the drawdown force of high-density polyethylene (HDPE) increases with increasing the die length. This is attributed to the rapid crystallization owing to the low density of entanglement couplings after passing through a long die. On the contrary, the die length has no/little influence on the drawdown force of linear low-density polyethylene (LLDPE), indicating that the molecular orientation applied in a long die is almost relaxed prior to the crystallization. Even for LLDPE, however, the drawdown force becomes sensitive to the die length by the addition of a small amount of HDPE, because the crystallization process is accelerated. |
| Rights: | Copyright (C) 2016 日本レオロジー学会. Jiraporn Seemork, Tomoki Itoh, Shogo Nobukawa, Masayuki Yamaguchi, 日本レオロジー学会誌, 44(1), 2016, 23-27. http://dx.doi.org/10.1678/rheology.44.23 |
| URI: | https://hdl.handle.net/10119/13786 |
| Material Type: | publisher |
| Appears in Collections: | c10-1. 雑誌掲載論文 (Journal Articles)
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