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Mechanical Properties of Injection Molded PP/PET-Nanofibril Composites and Foams

The creation and application of PET nanofibrils for PP composite reinforcement were studied. PET nanofibrils were fibrillated within a PP matrix using a spunbond process and then injection molded to test for the end-use properties. The nanofibril reinforcement helped to provide higher tensile and fl...

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Detalles Bibliográficos
Autores principales: Mark, Lun Howe, Zhao, Chongxiang, Chu, Raymond K. M., Park, Chul B.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9315760/
https://www.ncbi.nlm.nih.gov/pubmed/35890732
http://dx.doi.org/10.3390/polym14142958
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author Mark, Lun Howe
Zhao, Chongxiang
Chu, Raymond K. M.
Park, Chul B.
author_facet Mark, Lun Howe
Zhao, Chongxiang
Chu, Raymond K. M.
Park, Chul B.
author_sort Mark, Lun Howe
collection PubMed
description The creation and application of PET nanofibrils for PP composite reinforcement were studied. PET nanofibrils were fibrillated within a PP matrix using a spunbond process and then injection molded to test for the end-use properties. The nanofibril reinforcement helped to provide higher tensile and flexural performance in solid (unfoamed) injection molded parts. With foam injection molding, the nanofibrils also helped to improve and refine the microcellular morphology, which led to improved performance. Easily and effectively increasing the strength of a polymeric composite is a goal for many research endeavors. By creating nanoscale fibrils within the matrix itself, effective bonding and dispersion have already been achieved, overcoming the common pitfalls of fiber reinforcement. As blends of PP and PET are drawn in a spunbond system, the PET domains are stretched into nanoscale fibrils. By adapting the spunbonded blends for use in injection molding, both solid and foamed nanocomposites are created. The injection molded nanocomposites achieved increased in both tensile and flexural strength. The solid and foamed tensile strength increased by 50 and 100%, respectively. In addition, both the solid and foamed flexural strength increased by 100%. These increases in strength are attributed to effective PET nanofibril reinforcement.
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spelling pubmed-93157602022-07-27 Mechanical Properties of Injection Molded PP/PET-Nanofibril Composites and Foams Mark, Lun Howe Zhao, Chongxiang Chu, Raymond K. M. Park, Chul B. Polymers (Basel) Article The creation and application of PET nanofibrils for PP composite reinforcement were studied. PET nanofibrils were fibrillated within a PP matrix using a spunbond process and then injection molded to test for the end-use properties. The nanofibril reinforcement helped to provide higher tensile and flexural performance in solid (unfoamed) injection molded parts. With foam injection molding, the nanofibrils also helped to improve and refine the microcellular morphology, which led to improved performance. Easily and effectively increasing the strength of a polymeric composite is a goal for many research endeavors. By creating nanoscale fibrils within the matrix itself, effective bonding and dispersion have already been achieved, overcoming the common pitfalls of fiber reinforcement. As blends of PP and PET are drawn in a spunbond system, the PET domains are stretched into nanoscale fibrils. By adapting the spunbonded blends for use in injection molding, both solid and foamed nanocomposites are created. The injection molded nanocomposites achieved increased in both tensile and flexural strength. The solid and foamed tensile strength increased by 50 and 100%, respectively. In addition, both the solid and foamed flexural strength increased by 100%. These increases in strength are attributed to effective PET nanofibril reinforcement. MDPI 2022-07-21 /pmc/articles/PMC9315760/ /pubmed/35890732 http://dx.doi.org/10.3390/polym14142958 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Mark, Lun Howe
Zhao, Chongxiang
Chu, Raymond K. M.
Park, Chul B.
Mechanical Properties of Injection Molded PP/PET-Nanofibril Composites and Foams
title Mechanical Properties of Injection Molded PP/PET-Nanofibril Composites and Foams
title_full Mechanical Properties of Injection Molded PP/PET-Nanofibril Composites and Foams
title_fullStr Mechanical Properties of Injection Molded PP/PET-Nanofibril Composites and Foams
title_full_unstemmed Mechanical Properties of Injection Molded PP/PET-Nanofibril Composites and Foams
title_short Mechanical Properties of Injection Molded PP/PET-Nanofibril Composites and Foams
title_sort mechanical properties of injection molded pp/pet-nanofibril composites and foams
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9315760/
https://www.ncbi.nlm.nih.gov/pubmed/35890732
http://dx.doi.org/10.3390/polym14142958
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