Modification of rheological responses under elongational flow at non-isothermal condition
Rheological responses under elongational flow at non-isothermal condition are significantly important for actual polymer processing. Drawdown force, defined as a force required to stretch a molten polymer, was evaluated as the non-isothermal rheological response using polypropylene (PP) in this stud...
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2023
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my.utem.eprints.279162024-09-20T16:30:00Z http://eprints.utem.edu.my/id/eprint/27916/ Modification of rheological responses under elongational flow at non-isothermal condition Yamaguchi, Masayuki Seemork, Jiraporn Phulkerd, Panitha Ali, Mohd Amran Bin Md Rheological responses under elongational flow at non-isothermal condition are significantly important for actual polymer processing. Drawdown force, defined as a force required to stretch a molten polymer, was evaluated as the non-isothermal rheological response using polypropylene (PP) in this study. It was found that the die length affected the drawdown force, which was pronounced for a system having a long relaxation time. The prompt crystallization after passing through a long die would be responsible for this phenomenon. Furthermore, the addition of a nucleating agent was quite effective to increase the drawdown force, at which the shape of a nucleating agent has to be considered. The accelerated crystallization by the addition of a fibrous nucleating agent resulted in the pseudo shish-kebab structure, leading to high modulus in the flow direction. Finally, the addition of a low-viscous acrylate polymer was found to enhance the drawdown force of PP. Due to the prompt solidification of the acrylate polymer under a rapid cooling condition, the dispersions acted as rigid fibers before the crystallization of PP. These modification methods will be available to improve the processability at various processing operations at which a molten polymer is stretched at non-isothermal condition. 2023 Conference or Workshop Item PeerReviewed text en http://eprints.utem.edu.my/id/eprint/27916/1/Modification%20of%20Rheological%20Responses%20under%20Elongational%20Flow%20at%20Non-Isothermal%20CONDITON.pdf Yamaguchi, Masayuki and Seemork, Jiraporn and Phulkerd, Panitha and Ali, Mohd Amran Bin Md (2023) Modification of rheological responses under elongational flow at non-isothermal condition. In: 9th International Conference on Novel Trends in Rheology, 26 July 2023through 27 July 2023, Zlin. https://pubs.aip.org/aip/acp/article-abstract/2997/1/020004/2895373/Modification-of-rheological-responses-under?redirectedFrom=fulltext |
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Rheological responses under elongational flow at non-isothermal condition are significantly important for actual polymer processing. Drawdown force, defined as a force required to stretch a molten polymer, was evaluated as the non-isothermal rheological response using polypropylene (PP) in this study. It was found that the die length affected the drawdown force, which was pronounced for a system having a long relaxation time. The prompt crystallization after passing through a long die would be responsible for this phenomenon. Furthermore, the addition of a nucleating agent was quite effective to increase the drawdown force, at which the shape of a nucleating agent has to be considered. The accelerated crystallization by the addition of a fibrous nucleating agent resulted in the pseudo shish-kebab structure, leading to high modulus in the flow direction. Finally, the addition of a low-viscous acrylate polymer was found to enhance the drawdown force of PP. Due to the prompt solidification of the acrylate polymer under a rapid cooling condition, the dispersions acted as rigid fibers before the crystallization of PP. These modification methods will be available to improve the processability at various processing operations at which a molten polymer is stretched at non-isothermal condition. |
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Conference or Workshop Item |
author |
Yamaguchi, Masayuki Seemork, Jiraporn Phulkerd, Panitha Ali, Mohd Amran Bin Md |
spellingShingle |
Yamaguchi, Masayuki Seemork, Jiraporn Phulkerd, Panitha Ali, Mohd Amran Bin Md Modification of rheological responses under elongational flow at non-isothermal condition |
author_facet |
Yamaguchi, Masayuki Seemork, Jiraporn Phulkerd, Panitha Ali, Mohd Amran Bin Md |
author_sort |
Yamaguchi, Masayuki |
title |
Modification of rheological responses under elongational flow at non-isothermal condition |
title_short |
Modification of rheological responses under elongational flow at non-isothermal condition |
title_full |
Modification of rheological responses under elongational flow at non-isothermal condition |
title_fullStr |
Modification of rheological responses under elongational flow at non-isothermal condition |
title_full_unstemmed |
Modification of rheological responses under elongational flow at non-isothermal condition |
title_sort |
modification of rheological responses under elongational flow at non-isothermal condition |
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2023 |
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http://eprints.utem.edu.my/id/eprint/27916/1/Modification%20of%20Rheological%20Responses%20under%20Elongational%20Flow%20at%20Non-Isothermal%20CONDITON.pdf http://eprints.utem.edu.my/id/eprint/27916/ https://pubs.aip.org/aip/acp/article-abstract/2997/1/020004/2895373/Modification-of-rheological-responses-under?redirectedFrom=fulltext |
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