Effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt

High density polyethylene/n-Hexane system was adopted to investigate the bubbles nucleation and collapse in polymer melt with a visualization apparatus at different temperatures. The results showed that the initial bubble number, initial total bubble volume and the mean bubble diameter all increased...

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Autores principales:	Lei Xu, Zhengliang Huang, Yao Yang, Binbo Jiang, Jingyuan Sun, Jingdai Wang, Yongrong Yang
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Temperature Bubble Collapse Nucleation Polyethylene melt Polymers and polymer manufacture TP1080-1185
Acceso en línea:	https://doaj.org/article/169da14d4f554cc18971a0e46725a08f
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spelling	oai:doaj.org-article:169da14d4f554cc18971a0e46725a08f2021-11-24T04:24:31ZEffects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt0142-941810.1016/j.polymertesting.2020.106932https://doaj.org/article/169da14d4f554cc18971a0e46725a08f2021-01-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S0142941820321619https://doaj.org/toc/0142-9418High density polyethylene/n-Hexane system was adopted to investigate the bubbles nucleation and collapse in polymer melt with a visualization apparatus at different temperatures. The results showed that the initial bubble number, initial total bubble volume and the mean bubble diameter all increased with the temperature increasing, and the bubble diameter distribution changed from single peak distribution to bimodal distribution. Moreover, the effect of temperature on the maximum bubble diameter was mainly reflected in the change of the pressure in bubbles due to the change of the volatile content in the polyethylene melt. For bubble collapse, the collapse time became longer but the bubble collapse rate became faster with the temperature increasing, and a fitting model was established in which the collapse coefficient n was used to describe the collapse rate. Through dimension analysis, the correlation between the collapse coefficient n and the melt surface tension σ, zero-shear melt viscosity η0, diffusion coefficient D, maximum bubble diameter dmax, melt density ρ, initial bubble number density Nini were established and the variation of D with temperature could be predicted as an exponential correlation.Lei XuZhengliang HuangYao YangBinbo JiangJingyuan SunJingdai WangYongrong YangElsevierarticleTemperatureBubbleCollapseNucleationPolyethylene meltPolymers and polymer manufactureTP1080-1185ENPolymer Testing, Vol 93, Iss , Pp 106932- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Temperature Bubble Collapse Nucleation Polyethylene melt Polymers and polymer manufacture TP1080-1185
spellingShingle	Temperature Bubble Collapse Nucleation Polyethylene melt Polymers and polymer manufacture TP1080-1185 Lei Xu Zhengliang Huang Yao Yang Binbo Jiang Jingyuan Sun Jingdai Wang Yongrong Yang Effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt
description	High density polyethylene/n-Hexane system was adopted to investigate the bubbles nucleation and collapse in polymer melt with a visualization apparatus at different temperatures. The results showed that the initial bubble number, initial total bubble volume and the mean bubble diameter all increased with the temperature increasing, and the bubble diameter distribution changed from single peak distribution to bimodal distribution. Moreover, the effect of temperature on the maximum bubble diameter was mainly reflected in the change of the pressure in bubbles due to the change of the volatile content in the polyethylene melt. For bubble collapse, the collapse time became longer but the bubble collapse rate became faster with the temperature increasing, and a fitting model was established in which the collapse coefficient n was used to describe the collapse rate. Through dimension analysis, the correlation between the collapse coefficient n and the melt surface tension σ, zero-shear melt viscosity η0, diffusion coefficient D, maximum bubble diameter dmax, melt density ρ, initial bubble number density Nini were established and the variation of D with temperature could be predicted as an exponential correlation.
format	article
author	Lei Xu Zhengliang Huang Yao Yang Binbo Jiang Jingyuan Sun Jingdai Wang Yongrong Yang
author_facet	Lei Xu Zhengliang Huang Yao Yang Binbo Jiang Jingyuan Sun Jingdai Wang Yongrong Yang
author_sort	Lei Xu
title	Effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt
title_short	Effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt
title_full	Effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt
title_fullStr	Effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt
title_full_unstemmed	Effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt
title_sort	effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/169da14d4f554cc18971a0e46725a08f
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_version_	1718416020564082688

Effects of temperature on nucleation and collapse of volatile bubbles in the high density polyethylene melt

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