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The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene
Nucleation of the γ-form in isotactic polypropylene (PP) under high pressure was investigated. Three nucleating agents were used to nucleate crystallization of PP under atmospheric pressure: commercial Hyperform HPN-20E from Milliken Chemical, poly(tetrafluoroethylene) particles nucleating the α-for...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Berlin Heidelberg
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4342516/ https://www.ncbi.nlm.nih.gov/pubmed/25750474 http://dx.doi.org/10.1007/s00396-014-3445-z |
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author | Sowinski, Przemyslaw Piorkowska, Ewa Boyer, Severine A. E. Haudin, Jean-Marc Zapala, Kinga |
author_facet | Sowinski, Przemyslaw Piorkowska, Ewa Boyer, Severine A. E. Haudin, Jean-Marc Zapala, Kinga |
author_sort | Sowinski, Przemyslaw |
collection | PubMed |
description | Nucleation of the γ-form in isotactic polypropylene (PP) under high pressure was investigated. Three nucleating agents were used to nucleate crystallization of PP under atmospheric pressure: commercial Hyperform HPN-20E from Milliken Chemical, poly(tetrafluoroethylene) particles nucleating the α-form, and calcium pimelate nucleating the β-form. Crystallization of neat PP and PP with addition of 0.2 wt% of the nucleating agents was studied. Specimens were either kept at 200 °C under pressure of 200 MPa for time ranging from 2 min to 4 h or for 15 min under pressure ranging from 1.3 to 300 MPa. After cooling to ambient temperature and releasing the pressure, the specimens were analyzed by DSC, WAXD, and PLM to have an insight into the structure and to determine a crystallinity level and contents of crystallographic forms. Both α-nucleating agents strongly nucleated crystallization of PP under high pressure in the γ-form, whereas the β-nucleating agent had only a slight effect. The results show the possibility to use nucleating agents to nucleate the γ-form of PP under high pressure. |
format | Online Article Text |
id | pubmed-4342516 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | Springer Berlin Heidelberg |
record_format | MEDLINE/PubMed |
spelling | pubmed-43425162015-03-04 The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene Sowinski, Przemyslaw Piorkowska, Ewa Boyer, Severine A. E. Haudin, Jean-Marc Zapala, Kinga Colloid Polym Sci Original Contribution Nucleation of the γ-form in isotactic polypropylene (PP) under high pressure was investigated. Three nucleating agents were used to nucleate crystallization of PP under atmospheric pressure: commercial Hyperform HPN-20E from Milliken Chemical, poly(tetrafluoroethylene) particles nucleating the α-form, and calcium pimelate nucleating the β-form. Crystallization of neat PP and PP with addition of 0.2 wt% of the nucleating agents was studied. Specimens were either kept at 200 °C under pressure of 200 MPa for time ranging from 2 min to 4 h or for 15 min under pressure ranging from 1.3 to 300 MPa. After cooling to ambient temperature and releasing the pressure, the specimens were analyzed by DSC, WAXD, and PLM to have an insight into the structure and to determine a crystallinity level and contents of crystallographic forms. Both α-nucleating agents strongly nucleated crystallization of PP under high pressure in the γ-form, whereas the β-nucleating agent had only a slight effect. The results show the possibility to use nucleating agents to nucleate the γ-form of PP under high pressure. Springer Berlin Heidelberg 2014-11-13 2015 /pmc/articles/PMC4342516/ /pubmed/25750474 http://dx.doi.org/10.1007/s00396-014-3445-z Text en © The Author(s) 2014 https://creativecommons.org/licenses/by/4.0/ Open Access This article is distributed under the terms of the Creative Commons Attribution License which permits any use, distribution, and reproduction in any medium, provided the original author(s) and the source are credited. |
spellingShingle | Original Contribution Sowinski, Przemyslaw Piorkowska, Ewa Boyer, Severine A. E. Haudin, Jean-Marc Zapala, Kinga The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene |
title | The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene |
title_full | The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene |
title_fullStr | The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene |
title_full_unstemmed | The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene |
title_short | The role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene |
title_sort | role of nucleating agents in high-pressure-induced gamma crystallization in isotactic polypropylene |
topic | Original Contribution |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4342516/ https://www.ncbi.nlm.nih.gov/pubmed/25750474 http://dx.doi.org/10.1007/s00396-014-3445-z |
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