Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends

[EN] Highly linear or high-density polyethylenes (HDPEs) have an intrinsically high nucleation density compared to other polyolefins. Enhancing their nucleation density by self-nucleation is therefore difficult, leading to a narrow self-nucleation Domain (i.e., the so-called Domain II or the tempera...

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Autores: Fenni, Seif Eddine, Caputo, Maria Rosaria, Müller Sánchez, Alejandro Jesús, Cavallo, Dario
Tipo de recurso: artículo
Fecha de publicación:2022
País:España
Institución:Universidad del País Vasco
Repositorio:Addi. Archivo Digital para la Docencia y la Investigación
OAI Identifier:oai:addi.ehu.eus:10810/56556
Acceso en línea:http://hdl.handle.net/10810/56556
Access Level:acceso abierto
Palabra clave:confined crystallization phenomena
sized pa6 droplets
fractionated crystallization
homogeneous nucleation
polymer blends
polypropylene
micrometer
copolymers
kinetics
PCL
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spelling Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible BlendsFenni, Seif EddineCaputo, Maria RosariaMüller Sánchez, Alejandro JesúsCavallo, Darioconfined crystallization phenomenasized pa6 dropletsfractionated crystallizationhomogeneous nucleationpolymer blendspolypropylenemicrometercopolymerskineticsPCL[EN] Highly linear or high-density polyethylenes (HDPEs) have an intrinsically high nucleation density compared to other polyolefins. Enhancing their nucleation density by self-nucleation is therefore difficult, leading to a narrow self-nucleation Domain (i.e., the so-called Domain II or the temperature Domain where self-nuclei can be injected into the material without the occurrence of annealing). In this work, we report that when HDPE is blended (up to 50%) with immiscible matrices, such as atactic polystyrene (PS) or Nylon 6, its self-nucleation capacity can be greatly increased. In addition, temperatures higher than the equilibrium melting temperature of the HDPE phase are needed to erase the significantly enhanced crystalline memory in the blends. Morphological evidence gathered by Scanning and Transmission Electron Microscopies (SEM and TEM) indicates that these unexpected results can be explained by the modification of the interface between blend components. The filling of the solid HDPE surface asperities by the low viscosity polystyrene during heating to the self-nucleation temperature, or the crystallization of the matrix in the case of Nylon 6, enhances the interface roughness between the two polymers in the blends. Such rougher interfaces can remarkably increase the self-nucleation capacity of the HDPE phase via surface nucleation.The authors acknowledge technical and human support provided by SGIker (UPV/EHU/ERDF, EU). This work has also received funding from the Basque Government through grant IT1309-19.American Chemical Society202220222022info:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10810/56556reponame:Addi. Archivo Digital para la Docencia y la Investigacióninstname:Universidad del País VascoIngléshttps://pubs.acs.org/doi/10.1021/acs.macromol.1c02487info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/3.0/es/© 2022 The Authors. Published by American Chemical Society. Attribution 4.0 International (CC BY 4.0)Atribución 3.0 Españaoai:addi.ehu.eus:10810/565562026-06-18T09:23:17Z
dc.title.none.fl_str_mv Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends
title Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends
spellingShingle Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends
Fenni, Seif Eddine
confined crystallization phenomena
sized pa6 droplets
fractionated crystallization
homogeneous nucleation
polymer blends
polypropylene
micrometer
copolymers
kinetics
PCL
title_short Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends
title_full Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends
title_fullStr Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends
title_full_unstemmed Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends
title_sort Surface Roughness Enhances Self-Nucleation of High-Density Polyethylene Droplets Dispersed within Immiscible Blends
dc.creator.none.fl_str_mv Fenni, Seif Eddine
Caputo, Maria Rosaria
Müller Sánchez, Alejandro Jesús
Cavallo, Dario
author Fenni, Seif Eddine
author_facet Fenni, Seif Eddine
Caputo, Maria Rosaria
Müller Sánchez, Alejandro Jesús
Cavallo, Dario
author_role author
author2 Caputo, Maria Rosaria
Müller Sánchez, Alejandro Jesús
Cavallo, Dario
author2_role author
author
author
dc.subject.none.fl_str_mv confined crystallization phenomena
sized pa6 droplets
fractionated crystallization
homogeneous nucleation
polymer blends
polypropylene
micrometer
copolymers
kinetics
PCL
topic confined crystallization phenomena
sized pa6 droplets
fractionated crystallization
homogeneous nucleation
polymer blends
polypropylene
micrometer
copolymers
kinetics
PCL
description [EN] Highly linear or high-density polyethylenes (HDPEs) have an intrinsically high nucleation density compared to other polyolefins. Enhancing their nucleation density by self-nucleation is therefore difficult, leading to a narrow self-nucleation Domain (i.e., the so-called Domain II or the temperature Domain where self-nuclei can be injected into the material without the occurrence of annealing). In this work, we report that when HDPE is blended (up to 50%) with immiscible matrices, such as atactic polystyrene (PS) or Nylon 6, its self-nucleation capacity can be greatly increased. In addition, temperatures higher than the equilibrium melting temperature of the HDPE phase are needed to erase the significantly enhanced crystalline memory in the blends. Morphological evidence gathered by Scanning and Transmission Electron Microscopies (SEM and TEM) indicates that these unexpected results can be explained by the modification of the interface between blend components. The filling of the solid HDPE surface asperities by the low viscosity polystyrene during heating to the self-nucleation temperature, or the crystallization of the matrix in the case of Nylon 6, enhances the interface roughness between the two polymers in the blends. Such rougher interfaces can remarkably increase the self-nucleation capacity of the HDPE phase via surface nucleation.
publishDate 2022
dc.date.none.fl_str_mv 2022
2022
2022
dc.type.none.fl_str_mv info:eu-repo/semantics/article
format article
dc.identifier.none.fl_str_mv http://hdl.handle.net/10810/56556
url http://hdl.handle.net/10810/56556
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv https://pubs.acs.org/doi/10.1021/acs.macromol.1c02487
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/3.0/es/
Atribución 3.0 España
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/3.0/es/
Atribución 3.0 España
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv American Chemical Society
publisher.none.fl_str_mv American Chemical Society
dc.source.none.fl_str_mv reponame:Addi. Archivo Digital para la Docencia y la Investigación
instname:Universidad del País Vasco
instname_str Universidad del País Vasco
reponame_str Addi. Archivo Digital para la Docencia y la Investigación
collection Addi. Archivo Digital para la Docencia y la Investigación
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,300724

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