Cargando…
High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst
In this work, different types of polyethylene (linear, spiral nanofibers and microspheres) were obtained via confined polymerization by a PPM‐supported Ziegler‐Natta catalyst. Firstly, the Ziegler‐Natta catalyst was chemical bonded inside the porous polymer microspheres (PPMs) supports with differen...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7658954/ https://www.ncbi.nlm.nih.gov/pubmed/33209565 http://dx.doi.org/10.1002/open.202000290 |
_version_ | 1783608757912076288 |
---|---|
author | Xiao, Yu Dai, Xiying Wang, Kui Zhou, Guangyuan |
author_facet | Xiao, Yu Dai, Xiying Wang, Kui Zhou, Guangyuan |
author_sort | Xiao, Yu |
collection | PubMed |
description | In this work, different types of polyethylene (linear, spiral nanofibers and microspheres) were obtained via confined polymerization by a PPM‐supported Ziegler‐Natta catalyst. Firstly, the Ziegler‐Natta catalyst was chemical bonded inside the porous polymer microspheres (PPMs) supports with different pore diameter and supports size through chemical reaction. Then slightly and highly confined polymerization occurred in the PPM‐supported Ziegler‐Natta catalysts. SEM results illustrated that the slightly confined polymerization was easy to obtain linear and spiral nanofibers, and the nanofibers were observed in polyethylene catalyzed by PPMs‐1#/cat and PPMs‐2#/cat with low pore diameter (about 23 nm). Furthermore, the highly confined polymerization produced polyethylene microspheres, which obtained through other PPM‐supported Ziegler‐Natta catalysts with high pore diameter. In addition, high second melting point (T (m2): up to 143.3 °C) is a unique property of the polyethylene obtained by the PPM‐supported Ziegler‐Natta catalyst after removing the residue through physical treatment. The high T (m2) was ascribed to low surface free energy (σ (e)), which was owing to the entanglement of polyethylene polymerized in the PPMs supports with interconnected multi‐modal pore structure. |
format | Online Article Text |
id | pubmed-7658954 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-76589542020-11-17 High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst Xiao, Yu Dai, Xiying Wang, Kui Zhou, Guangyuan ChemistryOpen Full Papers In this work, different types of polyethylene (linear, spiral nanofibers and microspheres) were obtained via confined polymerization by a PPM‐supported Ziegler‐Natta catalyst. Firstly, the Ziegler‐Natta catalyst was chemical bonded inside the porous polymer microspheres (PPMs) supports with different pore diameter and supports size through chemical reaction. Then slightly and highly confined polymerization occurred in the PPM‐supported Ziegler‐Natta catalysts. SEM results illustrated that the slightly confined polymerization was easy to obtain linear and spiral nanofibers, and the nanofibers were observed in polyethylene catalyzed by PPMs‐1#/cat and PPMs‐2#/cat with low pore diameter (about 23 nm). Furthermore, the highly confined polymerization produced polyethylene microspheres, which obtained through other PPM‐supported Ziegler‐Natta catalysts with high pore diameter. In addition, high second melting point (T (m2): up to 143.3 °C) is a unique property of the polyethylene obtained by the PPM‐supported Ziegler‐Natta catalyst after removing the residue through physical treatment. The high T (m2) was ascribed to low surface free energy (σ (e)), which was owing to the entanglement of polyethylene polymerized in the PPMs supports with interconnected multi‐modal pore structure. John Wiley and Sons Inc. 2020-11-12 /pmc/articles/PMC7658954/ /pubmed/33209565 http://dx.doi.org/10.1002/open.202000290 Text en © 2020 The Authors. Published by Wiley-VCH GmbH This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Full Papers Xiao, Yu Dai, Xiying Wang, Kui Zhou, Guangyuan High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst |
title | High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst |
title_full | High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst |
title_fullStr | High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst |
title_full_unstemmed | High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst |
title_short | High Melting Point of Linear, Spiral Polyethylene Nanofibers and Polyethylene Microspheres Obtained Through Confined Polymerization by a PPM‐Supported Ziegler‐Natta Catalyst |
title_sort | high melting point of linear, spiral polyethylene nanofibers and polyethylene microspheres obtained through confined polymerization by a ppm‐supported ziegler‐natta catalyst |
topic | Full Papers |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7658954/ https://www.ncbi.nlm.nih.gov/pubmed/33209565 http://dx.doi.org/10.1002/open.202000290 |
work_keys_str_mv | AT xiaoyu highmeltingpointoflinearspiralpolyethylenenanofibersandpolyethylenemicrospheresobtainedthroughconfinedpolymerizationbyappmsupportedzieglernattacatalyst AT daixiying highmeltingpointoflinearspiralpolyethylenenanofibersandpolyethylenemicrospheresobtainedthroughconfinedpolymerizationbyappmsupportedzieglernattacatalyst AT wangkui highmeltingpointoflinearspiralpolyethylenenanofibersandpolyethylenemicrospheresobtainedthroughconfinedpolymerizationbyappmsupportedzieglernattacatalyst AT zhouguangyuan highmeltingpointoflinearspiralpolyethylenenanofibersandpolyethylenemicrospheresobtainedthroughconfinedpolymerizationbyappmsupportedzieglernattacatalyst |