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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...

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Autores principales: Ping, Jiajia, Ma, Guiqiu, Ma, Zhe
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
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.
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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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AT maguiqiu crystallizationbehaviorofisotacticpolybuteneblendedwithpolyethylene
AT mazhe crystallizationbehaviorofisotacticpolybuteneblendedwithpolyethylene