聚碳酸酯的非线性剪切和伸长流变学研究

IF 1.3 4区 工程技术 Q3 MECHANICS
Lixin Yang, Takashi Uneyama, Y. Masubuchi, Y. Doi
{"title":"聚碳酸酯的非线性剪切和伸长流变学研究","authors":"Lixin Yang, Takashi Uneyama, Y. Masubuchi, Y. Doi","doi":"10.1678/rheology.50.127","DOIUrl":null,"url":null,"abstract":"Nonlinear shear and elongational rheology of entangled poly(propylene carbonate) (PPC) melts having different molecular weights with relatively narrow molecular weight distribution are examined. In shear measurements, the PPCs exhibit a typical shear thinning behavior with stress overshoot at high shear rates. In the shear rate dependence of the steady-state viscosity, the PPCs do not violate the empirical Cox-Merz rule, which is known to be valid for many other entangled polymer melts. In uniaxial elongational measurements, the viscosity growth functions of the PPCs show a weak deviation from the linear viscoelastic (LVE) envelope to the higher side at the high Weissenberg number Wi d (= ͘ετ d , where ͘ε is the elongation rate and τ d is the characteristic disengagement time). The steady-state viscosity of the PPCs shows an elongational thinning as a function of ͘ε \u0003−0.5 within an error. These results are similar to some other polymer melts such as polystyrene (PS). In addition, the normalized elongational viscosity growth functions of PPC and PS with a similar entanglement number Z , are compared. The PPC exhibits a similar viscosity growth curve to the PS at the same Wi d . This result suggests that the degree of the monomeric friction reduction originated from the stretch/orientation of PPC under fast elongational flow\u0003might\u0003occur\u0003at\u0003the\u0003same\u0003level\u0003as\u0003PS.","PeriodicalId":19282,"journal":{"name":"Nihon Reoroji Gakkaishi","volume":" ","pages":""},"PeriodicalIF":1.3000,"publicationDate":"2022-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Nonlinear Shear and Elongational Rheology of Poly(propylene carbonate)\",\"authors\":\"Lixin Yang, Takashi Uneyama, Y. Masubuchi, Y. Doi\",\"doi\":\"10.1678/rheology.50.127\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Nonlinear shear and elongational rheology of entangled poly(propylene carbonate) (PPC) melts having different molecular weights with relatively narrow molecular weight distribution are examined. In shear measurements, the PPCs exhibit a typical shear thinning behavior with stress overshoot at high shear rates. In the shear rate dependence of the steady-state viscosity, the PPCs do not violate the empirical Cox-Merz rule, which is known to be valid for many other entangled polymer melts. In uniaxial elongational measurements, the viscosity growth functions of the PPCs show a weak deviation from the linear viscoelastic (LVE) envelope to the higher side at the high Weissenberg number Wi d (= ͘ετ d , where ͘ε is the elongation rate and τ d is the characteristic disengagement time). The steady-state viscosity of the PPCs shows an elongational thinning as a function of ͘ε \\u0003−0.5 within an error. These results are similar to some other polymer melts such as polystyrene (PS). In addition, the normalized elongational viscosity growth functions of PPC and PS with a similar entanglement number Z , are compared. The PPC exhibits a similar viscosity growth curve to the PS at the same Wi d . This result suggests that the degree of the monomeric friction reduction originated from the stretch/orientation of PPC under fast elongational flow\\u0003might\\u0003occur\\u0003at\\u0003the\\u0003same\\u0003level\\u0003as\\u0003PS.\",\"PeriodicalId\":19282,\"journal\":{\"name\":\"Nihon Reoroji Gakkaishi\",\"volume\":\" \",\"pages\":\"\"},\"PeriodicalIF\":1.3000,\"publicationDate\":\"2022-02-15\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Nihon Reoroji Gakkaishi\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://doi.org/10.1678/rheology.50.127\",\"RegionNum\":4,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MECHANICS\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Nihon Reoroji Gakkaishi","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1678/rheology.50.127","RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MECHANICS","Score":null,"Total":0}
引用次数: 3

摘要

研究了不同分子量、相对较窄分子量分布的聚碳酸亚丙酯(PPC)缠结熔体的非线性剪切流变和拉伸流变。在剪切测量中,PPC表现出典型的剪切减薄行为,在高剪切速率下具有应力超调。在稳态粘度的剪切速率依赖性中,PPCs不违反经验Cox-Merz规则,该规则已知对许多其他纠缠聚合物熔体有效。在单轴拉伸测量中,PPCs的粘度增长函数显示出在高Weissenberg数Wi d(=ετd,其中ε是伸长率,τd是特征脱离时间)时从线性粘弹性(LVE)包络向较高侧的微弱偏差。PPCs的稳态粘度显示出在误差范围内作为ε−0.5的函数的拉伸变稀。这些结果类似于其他一些聚合物熔体,如聚苯乙烯(PS)。此外,比较了具有相似纠缠数Z的PPC和PS的归一化拉伸粘度增长函数。在相同的Wi d下,PPC表现出与PS相似的粘度增长曲线。这一结果表明,在快速拉伸流动下,由PPC的拉伸/取向引起的单体减摩程度可能与PS相同。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nonlinear Shear and Elongational Rheology of Poly(propylene carbonate)
Nonlinear shear and elongational rheology of entangled poly(propylene carbonate) (PPC) melts having different molecular weights with relatively narrow molecular weight distribution are examined. In shear measurements, the PPCs exhibit a typical shear thinning behavior with stress overshoot at high shear rates. In the shear rate dependence of the steady-state viscosity, the PPCs do not violate the empirical Cox-Merz rule, which is known to be valid for many other entangled polymer melts. In uniaxial elongational measurements, the viscosity growth functions of the PPCs show a weak deviation from the linear viscoelastic (LVE) envelope to the higher side at the high Weissenberg number Wi d (= ͘ετ d , where ͘ε is the elongation rate and τ d is the characteristic disengagement time). The steady-state viscosity of the PPCs shows an elongational thinning as a function of ͘ε −0.5 within an error. These results are similar to some other polymer melts such as polystyrene (PS). In addition, the normalized elongational viscosity growth functions of PPC and PS with a similar entanglement number Z , are compared. The PPC exhibits a similar viscosity growth curve to the PS at the same Wi d . This result suggests that the degree of the monomeric friction reduction originated from the stretch/orientation of PPC under fast elongational flowmightoccuratthesamelevelasPS.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Nihon Reoroji Gakkaishi
Nihon Reoroji Gakkaishi 工程技术-高分子科学
CiteScore
1.50
自引率
61.50%
发文量
47
审稿时长
>12 weeks
期刊介绍: For the communication among the members, the journal of the Society of Rheology Japan, NIHON REOROJI GAKKAISHI (5 issues per year), was established in 1973 and it is the oldest journal on rheology in Asia. The journal contains original and review articles on rheology and related topics, information for all SRJ events, and reports of domestic/overseas meetings. Articles in Japanese as well as in English are considered for publication, not only from the members but also from the researchers outside. Papers from new emerging areas of the field are particularly welcome. The electronic version of the articles is available via the internet with an open access policy.
×
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