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Crystallization Behavior of Isotactic Polybutene Blended with Polyethylene
In this work, the melt crystallization behavior and the solid phase transition of isotactic polybutene (PB) were studied in the polybutene/high-density polyethylene (PB/PE) blends covering the whole composition range. For the dynamic cooling crystallization, PE exhibits almost the same crystallizati...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9028261/ https://www.ncbi.nlm.nih.gov/pubmed/35458646 http://dx.doi.org/10.3390/molecules27082448 |
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author | Ping, Jiajia Ma, Guiqiu Ma, Zhe |
author_facet | Ping, Jiajia Ma, Guiqiu Ma, Zhe |
author_sort | Ping, Jiajia |
collection | PubMed |
description | In this work, the melt crystallization behavior and the solid phase transition of isotactic polybutene (PB) were studied in the polybutene/high-density polyethylene (PB/PE) blends covering the whole composition range. For the dynamic cooling crystallization, PE exhibits almost the same crystallization temperature in all blends, whereas PB exhibits a distinct non-monotonic dependence on the composition ratio. Combining the ex situ X-ray diffraction and in situ Fourier transform infrared spectroscope, it was demonstrated that during cooling at 10 °C/min, the presence of at least 70 wt% PE can induce the formation of form I′ directly from the amorphous melt. The detailed relations of polymorphism with temperature were systematically investigated for the PB/PE blends. Different from the formation of the sole tetragonal phase with ≤50 wt% PE, the trigonal form I′ could crystallize directly from amorphous melt with ≥60 wt% PE, which can be further enhanced by elevating the temperature of isothermal crystallization. Interestingly, the critical lowest temperature of obtaining pure form I′ was 85 °C with 70 wt% PE and decreased to 80 °C as the PE fraction was increased to 80 wt%. On the other hand, the spontaneous phase transition from the kinetically favored form II into the thermodynamically stable form I was also explored with X-ray diffraction methods. It was found that at the room temperature, phase transition kinetics can be significantly accelerated by blending at least 70 wt% PE. |
format | Online Article Text |
id | pubmed-9028261 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-90282612022-04-23 Crystallization Behavior of Isotactic Polybutene Blended with Polyethylene Ping, Jiajia Ma, Guiqiu Ma, Zhe Molecules Article In this work, the melt crystallization behavior and the solid phase transition of isotactic polybutene (PB) were studied in the polybutene/high-density polyethylene (PB/PE) blends covering the whole composition range. For the dynamic cooling crystallization, PE exhibits almost the same crystallization temperature in all blends, whereas PB exhibits a distinct non-monotonic dependence on the composition ratio. Combining the ex situ X-ray diffraction and in situ Fourier transform infrared spectroscope, it was demonstrated that during cooling at 10 °C/min, the presence of at least 70 wt% PE can induce the formation of form I′ directly from the amorphous melt. The detailed relations of polymorphism with temperature were systematically investigated for the PB/PE blends. Different from the formation of the sole tetragonal phase with ≤50 wt% PE, the trigonal form I′ could crystallize directly from amorphous melt with ≥60 wt% PE, which can be further enhanced by elevating the temperature of isothermal crystallization. Interestingly, the critical lowest temperature of obtaining pure form I′ was 85 °C with 70 wt% PE and decreased to 80 °C as the PE fraction was increased to 80 wt%. On the other hand, the spontaneous phase transition from the kinetically favored form II into the thermodynamically stable form I was also explored with X-ray diffraction methods. It was found that at the room temperature, phase transition kinetics can be significantly accelerated by blending at least 70 wt% PE. MDPI 2022-04-11 /pmc/articles/PMC9028261/ /pubmed/35458646 http://dx.doi.org/10.3390/molecules27082448 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 Ping, Jiajia Ma, Guiqiu Ma, Zhe Crystallization Behavior of Isotactic Polybutene Blended with Polyethylene |
title | Crystallization Behavior of Isotactic Polybutene Blended with Polyethylene |
title_full | Crystallization Behavior of Isotactic Polybutene Blended with Polyethylene |
title_fullStr | Crystallization Behavior of Isotactic Polybutene Blended with Polyethylene |
title_full_unstemmed | Crystallization Behavior of Isotactic Polybutene Blended with Polyethylene |
title_short | Crystallization Behavior of Isotactic Polybutene Blended with Polyethylene |
title_sort | crystallization behavior of isotactic polybutene blended with polyethylene |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9028261/ https://www.ncbi.nlm.nih.gov/pubmed/35458646 http://dx.doi.org/10.3390/molecules27082448 |
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