Experimental and numerical study of the polyurethane foaming process using high-pressure CO2

IF 3.2 4区 工程技术 Q2 CHEMISTRY, APPLIED
D. Hu, Chen Zhou, Tao Liu, Yichong Chen, Zhen Liu, Ling Zhao
{"title":"Experimental and numerical study of the polyurethane foaming process using high-pressure CO2","authors":"D. Hu, Chen Zhou, Tao Liu, Yichong Chen, Zhen Liu, Ling Zhao","doi":"10.1177/0021955X20974291","DOIUrl":null,"url":null,"abstract":"A simulation of simultaneous bubble nucleation and growth was performed for polyurethane/CO2 physical foaming process. The single-factor and comprehensive effects of viscoelastic properties, Henry’s constant, CO2 diffusion coefficient and surface tension on the cell morphology were numerically analyzed. The results show that the cell density of PU foam (N0) increases and its average cell diameter (Dv) reduces with increased Henry’s constant and slower gas diffusion. Both N0 and Dv reduces with the curing degree (α). In addition, the effects of α and foaming conditions on the cell structure were experimentally investigated. With an increase of α at foamable range, Dv decreases continuously and N0 increases first and then declines. With increasing saturation pressure and depressurization rate or decreasing temperature, N0 increases and Dv reduces. There is an intrinsic correlation between the simulated and experimental variables, and the results of the simulation and experiment are generally consistent.","PeriodicalId":15236,"journal":{"name":"Journal of Cellular Plastics","volume":"39 1","pages":"927 - 949"},"PeriodicalIF":3.2000,"publicationDate":"2020-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Cellular Plastics","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1177/0021955X20974291","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"CHEMISTRY, APPLIED","Score":null,"Total":0}
引用次数: 4

Abstract

A simulation of simultaneous bubble nucleation and growth was performed for polyurethane/CO2 physical foaming process. The single-factor and comprehensive effects of viscoelastic properties, Henry’s constant, CO2 diffusion coefficient and surface tension on the cell morphology were numerically analyzed. The results show that the cell density of PU foam (N0) increases and its average cell diameter (Dv) reduces with increased Henry’s constant and slower gas diffusion. Both N0 and Dv reduces with the curing degree (α). In addition, the effects of α and foaming conditions on the cell structure were experimentally investigated. With an increase of α at foamable range, Dv decreases continuously and N0 increases first and then declines. With increasing saturation pressure and depressurization rate or decreasing temperature, N0 increases and Dv reduces. There is an intrinsic correlation between the simulated and experimental variables, and the results of the simulation and experiment are generally consistent.
高压CO2发泡聚氨酯过程的实验与数值研究
模拟了聚氨酯/CO2物理发泡过程中气泡同时成核和生长的过程。数值分析了粘弹性、亨利常数、CO2扩散系数和表面张力对细胞形态的单因素和综合影响。结果表明:随着亨利常数的增大和气体扩散速度的减慢,泡孔密度(N0)增大,泡孔平均直径(Dv)减小;N0和Dv随固化程度(α)的增大而减小。此外,还通过实验研究了α和发泡条件对细胞结构的影响。在发泡范围内,随着α的增加,Dv不断减小,N0先增大后减小。随着饱和压力和减压速率的增加或温度的降低,N0增大,Dv减小。模拟变量与实验变量之间存在内在的相关性,模拟结果与实验结果总体上是一致的。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
Journal of Cellular Plastics
Journal of Cellular Plastics 工程技术-高分子科学
CiteScore
5.00
自引率
16.00%
发文量
19
审稿时长
3 months
期刊介绍: The Journal of Cellular Plastics is a fully peer reviewed international journal that publishes original research and review articles covering the latest advances in foamed plastics technology.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信