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Effect of Thermal History and Shear on the Viscoelastic Response of iPP Containing an Oxalamide-Based Organic Compound
[Image: see text] We report on the role of temperature and shear on the melt behavior of iPP in the presence of the organic compound N1,N1′-(propane-1,3-diyl)bis(N2-hexyloxalamide) (OXA3,6). It is demonstrated that OXA3,6 facilitates a viscosity suppression when it resides in the molten state. The v...
Autores principales: | , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2019
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6459004/ https://www.ncbi.nlm.nih.gov/pubmed/30983633 http://dx.doi.org/10.1021/acs.macromol.8b02612 |
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author | Wilsens, Carolus H. R. M. Hawke, Laurence G. D. de Kort, Gijs W. Saidi, Sarah Roy, Manta Leoné, Nils Hermida-Merino, Daniel Peters, Gerrit W. M. Rastogi, Sanjay |
author_facet | Wilsens, Carolus H. R. M. Hawke, Laurence G. D. de Kort, Gijs W. Saidi, Sarah Roy, Manta Leoné, Nils Hermida-Merino, Daniel Peters, Gerrit W. M. Rastogi, Sanjay |
author_sort | Wilsens, Carolus H. R. M. |
collection | PubMed |
description | [Image: see text] We report on the role of temperature and shear on the melt behavior of iPP in the presence of the organic compound N1,N1′-(propane-1,3-diyl)bis(N2-hexyloxalamide) (OXA3,6). It is demonstrated that OXA3,6 facilitates a viscosity suppression when it resides in the molten state. The viscosity suppression is attributed to the interaction of iPP chains/subchains with molten OXA3,6 nanoclusters. The exact molecular mechanism has not been identified; nevertheless, a tentative explanation is proposed. The observed viscosity suppression appears similar to that encountered in polymer melts filled with solid nanoparticles, with the difference that the OXA3,6 compound reported in this study facilitates the viscosity suppression in the molten state. Upon cooling, as crystal growth of OXA3,6 progresses, the decrease in viscosity is suppressed. Retrospectively, segmental absorption of iPP chains on the surface of micrometer-sized OXA3,6 crystallites favors the formation of dangling arms, yielding OXA3,6 crystallites decorated with partially absorbed iPP chains. In other words, the resulting OXA3,6 particle morphology resembles that of a hairy particle or a starlike polymer chain. Such hairy particles effectively facilitate a viscosity enhancement, similar to branched polymer chains. This hypothesis and its implications for the shear behavior of iPP are discussed and supported using plate–plate rheometry and slit-flow experiments combined with small-angle X-ray scattering analysis. |
format | Online Article Text |
id | pubmed-6459004 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2019 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-64590042019-04-12 Effect of Thermal History and Shear on the Viscoelastic Response of iPP Containing an Oxalamide-Based Organic Compound Wilsens, Carolus H. R. M. Hawke, Laurence G. D. de Kort, Gijs W. Saidi, Sarah Roy, Manta Leoné, Nils Hermida-Merino, Daniel Peters, Gerrit W. M. Rastogi, Sanjay Macromolecules [Image: see text] We report on the role of temperature and shear on the melt behavior of iPP in the presence of the organic compound N1,N1′-(propane-1,3-diyl)bis(N2-hexyloxalamide) (OXA3,6). It is demonstrated that OXA3,6 facilitates a viscosity suppression when it resides in the molten state. The viscosity suppression is attributed to the interaction of iPP chains/subchains with molten OXA3,6 nanoclusters. The exact molecular mechanism has not been identified; nevertheless, a tentative explanation is proposed. The observed viscosity suppression appears similar to that encountered in polymer melts filled with solid nanoparticles, with the difference that the OXA3,6 compound reported in this study facilitates the viscosity suppression in the molten state. Upon cooling, as crystal growth of OXA3,6 progresses, the decrease in viscosity is suppressed. Retrospectively, segmental absorption of iPP chains on the surface of micrometer-sized OXA3,6 crystallites favors the formation of dangling arms, yielding OXA3,6 crystallites decorated with partially absorbed iPP chains. In other words, the resulting OXA3,6 particle morphology resembles that of a hairy particle or a starlike polymer chain. Such hairy particles effectively facilitate a viscosity enhancement, similar to branched polymer chains. This hypothesis and its implications for the shear behavior of iPP are discussed and supported using plate–plate rheometry and slit-flow experiments combined with small-angle X-ray scattering analysis. American Chemical Society 2019-03-21 2019-04-09 /pmc/articles/PMC6459004/ /pubmed/30983633 http://dx.doi.org/10.1021/acs.macromol.8b02612 Text en Copyright © 2019 American Chemical Society This is an open access article published under a Creative Commons Non-Commercial No Derivative Works (CC-BY-NC-ND) Attribution License (http://pubs.acs.org/page/policy/authorchoice_ccbyncnd_termsofuse.html) , which permits copying and redistribution of the article, and creation of adaptations, all for non-commercial purposes. |
spellingShingle | Wilsens, Carolus H. R. M. Hawke, Laurence G. D. de Kort, Gijs W. Saidi, Sarah Roy, Manta Leoné, Nils Hermida-Merino, Daniel Peters, Gerrit W. M. Rastogi, Sanjay Effect of Thermal History and Shear on the Viscoelastic Response of iPP Containing an Oxalamide-Based Organic Compound |
title | Effect of Thermal History and Shear on the Viscoelastic
Response of iPP Containing an Oxalamide-Based Organic
Compound |
title_full | Effect of Thermal History and Shear on the Viscoelastic
Response of iPP Containing an Oxalamide-Based Organic
Compound |
title_fullStr | Effect of Thermal History and Shear on the Viscoelastic
Response of iPP Containing an Oxalamide-Based Organic
Compound |
title_full_unstemmed | Effect of Thermal History and Shear on the Viscoelastic
Response of iPP Containing an Oxalamide-Based Organic
Compound |
title_short | Effect of Thermal History and Shear on the Viscoelastic
Response of iPP Containing an Oxalamide-Based Organic
Compound |
title_sort | effect of thermal history and shear on the viscoelastic
response of ipp containing an oxalamide-based organic
compound |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6459004/ https://www.ncbi.nlm.nih.gov/pubmed/30983633 http://dx.doi.org/10.1021/acs.macromol.8b02612 |
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