Rheologica Acta最新文献_第7页

Shear and extensional rheology of polyethylenes recycled using a solvent dissolution process 利用溶剂溶解工艺回收聚乙烯的剪切和拉伸流变学特性

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-04-11 DOI: 10.1007/s00397-024-01446-y

Guinevere Tillinghast, Kevin L. Sánchez-Rivera, George W. Huber, H. Henning Winter, Jonathan P. Rothstein

{"title":"Shear and extensional rheology of polyethylenes recycled using a solvent dissolution process","authors":"Guinevere Tillinghast, Kevin L. Sánchez-Rivera, George W. Huber, H. Henning Winter, Jonathan P. Rothstein","doi":"10.1007/s00397-024-01446-y","DOIUrl":"10.1007/s00397-024-01446-y","url":null,"abstract":"<div><p>There is high market demand for increasing the viability of current plastic recycling processes. In this work rheology is used to evaluate the mechanical properties of a solvent dissolution recycled polymer compared to its virgin untreated precursor. Solvent dissolution and precipitation are used to target multi-layer, multi-component, industry films, which cannot be mechanically recycled. Polyethylene was chosen as the primary polymer of interest. Polymer thermal stability was monitored via time-resolved rheology; consecutive frequency sweeps over the course of an hour while under isothermal conditions. Additional rheological experiments were performed within the identified thermally stable conditions. Small-angle oscillatory shear was complemented with steady shear viscosity experiments over a wide range of shear rates. Extensional rheology was used to determine changes in molecular weight and cross link density. Rheological characterization is supplemented with gas chromatography–mass spectrometry of the solvent wash to determine components stripped from the virgin polymers during solvent treatment.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 5","pages":"345 - 360"},"PeriodicalIF":2.3,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interfacial shear and elongational rheology of immiscible multi-micro-nanolayered polymers: contribution for probing the effect of highly mismatched viscoelastic properties and modeling interfacial tension properties 互不相溶的多微纳层状聚合物的界面剪切和拉伸流变学：有助于探测高度不匹配粘弹特性的影响和建立界面张力特性模型

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-04-09 DOI: 10.1007/s00397-024-01445-z

Jixiang Li, Ibtissam Touil, Bo Lu, Huagui Zhang, Abderrahim Maazouz, Khalid Lamnawar

{"title":"Interfacial shear and elongational rheology of immiscible multi-micro-nanolayered polymers: contribution for probing the effect of highly mismatched viscoelastic properties and modeling interfacial tension properties","authors":"Jixiang Li, Ibtissam Touil, Bo Lu, Huagui Zhang, Abderrahim Maazouz, Khalid Lamnawar","doi":"10.1007/s00397-024-01445-z","DOIUrl":"10.1007/s00397-024-01445-z","url":null,"abstract":"<div><p>The present work explores the shear and extensional rheology of immiscible multi-micro/nanolayered systems comprising low-density polyethylene (LDPE) paired with polystyrene (PS) and polycarbonate (PC) obtained from forced-assembly multilayer coextrusion. Firstly, miscible multilayer references based on LDPE/LLDPE layers were prepared with their miscibility characterized by shear and elongational measurements. Their strain hardening behaviors were found to be intricately linked to the number of layers and confinement. Secondly, for immiscible LDPE/PS and LDPE/PC multilayers with symmetric (50/50) and asymmetric (10/90) compositions, negative deviation of complex viscosities from neat polymers was highlighted because of the heightened confinement of LDPE chains by PS or PC and reduced entanglements at polymer–polymer interfaces. Intriguingly, LDPE/PC systems exhibited no strain hardening irrespective of layer configuration, while the geometric confinement imposed by PS layers facilitated interactions between single chains with long-chain branching (LCB), leading to strain hardening under specific conditions. Furthermore, the extensional viscosities were predicted using the Macosko model (<i>C.W. Macosko </i>et al<i>. Journal of Rheology. 63 2019</i>), accurately describing the behavior of 1024 layered films for both asymmetric (10/90) LDPE/PS and LDPE/PC systems, but not for 32 layers due to a limited number of interfaces. This study provides insights into quantifying interfacial tension properties in micro/nano-layered systems with high mismatched viscoelastic polymers, shedding light on their strain hardening properties in the presence of increased interfacial area.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 5","pages":"361 - 377"},"PeriodicalIF":2.3,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140578728","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Impact of slurry preparation method on the rheological behaviour of dense anode slurries for lithium-ion batteries 浆料制备方法对锂离子电池致密正极浆料流变特性的影响

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-03-19 DOI: 10.1007/s00397-024-01440-4

Soichiro Makino, Yusuke Akimoto, Masahiko Ishii, Hiroshi Nakamura

{"title":"Impact of slurry preparation method on the rheological behaviour of dense anode slurries for lithium-ion batteries","authors":"Soichiro Makino, Yusuke Akimoto, Masahiko Ishii, Hiroshi Nakamura","doi":"10.1007/s00397-024-01440-4","DOIUrl":"10.1007/s00397-024-01440-4","url":null,"abstract":"<div><p>Understanding and controlling the rheology of electrode slurries for lithium-ion batteries is critical both for improving their manufacturing efficiency and for achieving desirable battery performance. Here, we show drastic “slurry-preparation-dependent” rheology in an anode slurry for lithium-ion batteries, focusing on the behaviour of carboxymethyl cellulose (CMC), which is the most popular dispersant for graphite particles in anode slurries. Slurry preparation with dry-state mixing, where water is added to a dry mixture of graphite and CMC powder, results in much higher viscosity, yield stress, and elastic modulus than those achieved with conventional wet-state mixing, where graphite is added to a CMC solution. Cryogenic scanning electron microscopy reveals strange CMC “clumps” formed among the graphite particles in the slurry prepared with dry-state mixing. We attribute the increases in viscosity, yield stress, and elastic modulus for the slurries prepared with dry-state mixing to these clumps of CMC, which can enhance the adhesion between graphite particles and thereby constrain their motion. We also show that pre-shearing irreversibly decreases viscosity, yield stress, and elastic modulus, suggesting that the clumps of CMC are irreparably broken down by applied shear. The influence of the slurry preparation method on the rheological properties of anode slurries has not received attention in previous studies. Hence, we believe that our results might provide new strategies for controlling the rheology of the anode slurry in the manufacturing process for lithium-ion batteries.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 4","pages":"319 - 331"},"PeriodicalIF":2.3,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140170118","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Controlling the rheo-electric properties of graphite/carbon black suspensions by ‘flow switching’ 通过 "流动切换 "控制石墨/炭黑悬浮液的流变电特性

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-03-13 DOI: 10.1007/s00397-024-01439-x

Thomas Larsen, John R. Royer, Fraser H. J. Laidlaw, Wilson C. K. Poon, Tom Larsen, Søren J. Andreasen, Jesper de C. Christiansen

{"title":"Controlling the rheo-electric properties of graphite/carbon black suspensions by ‘flow switching’","authors":"Thomas Larsen, John R. Royer, Fraser H. J. Laidlaw, Wilson C. K. Poon, Tom Larsen, Søren J. Andreasen, Jesper de C. Christiansen","doi":"10.1007/s00397-024-01439-x","DOIUrl":"10.1007/s00397-024-01439-x","url":null,"abstract":"<p>The ability to manipulate rheological and electrical properties of colloidal carbon black gels makes them attractive in composites for energy applications such as batteries and fuel cells, where they conduct electricity and prevent sedimentation of ‘granular’ active components. While it is commonly assumed that granular fillers have a simple additive effect on the composite properties, new phenomena can emerge unexpectedly, with some composites exhibiting a unique rheological bi-stability between high-yield-stress and low-yield-stress states. Here we report such bi-stability in suspensions of non-Brownian graphite and colloidal carbon black in oil, a model system to mimic composite suspensions for energy applications. Steady shear below a critical stress elicits a transition to a persistent mechanically weak and poorly conducting state, which must be ‘rejuvenated’ using high-stress shear to recover a stronger, high-conductivity state. Our findings highlight the highly tunable nature of binary granular/gel composite suspensions and present new possibilities for optimising mixing and processing conditions for Li-ion battery slurries.</p>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 4","pages":"283 - 289"},"PeriodicalIF":2.3,"publicationDate":"2024-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-024-01439-x.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140128865","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Correction to: A metamodel for confined yield stress flows and parameters’ estimation 更正：约束屈服应力流元模型及参数估计

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-03-06 DOI: 10.1007/s00397-024-01441-3

Clément Berger, David Coulette, Paul Vigneaux

引用次数: 0

Generalized second-grade fluid flow over a tilted plate with bump topography 带有凹凸地形的倾斜板上的广义二级流体流动

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-03-02 DOI: 10.1007/s00397-024-01438-y

Mahesh T, Satyananda Panda

引用次数: 0

A metamodel for confined yield stress flows and parameters’ estimation 约束屈服应力流和参数估计的元模型

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-27 DOI: 10.1007/s00397-024-01436-0

Clément Berger, David Coulette, Paul Vigneaux

引用次数: 0

Influence of various pretreatments on molecular and rheological properties of a linear and a long-chain branched polypropylene 各种预处理对线性和长链支化聚丙烯分子和流变特性的影响

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-26 DOI: 10.1007/s00397-024-01437-z

Helmut Münstedt, Joachim Kaschta

{"title":"Influence of various pretreatments on molecular and rheological properties of a linear and a long-chain branched polypropylene","authors":"Helmut Münstedt, Joachim Kaschta","doi":"10.1007/s00397-024-01437-z","DOIUrl":"10.1007/s00397-024-01437-z","url":null,"abstract":"<div><p>The influence of a mechanical or a thermal pretreatment of a linear (L-PP) and a long-chain branched polypropylene (LCB-PP) in the molten state was studied. The molar mass distributions and the branching structure were determined by high-temperature gel permeation chromatography HT-GPC coupled with laser-light scattering. The samples were extruded through long or short capillaries of various geometries corresponding to a predominant shear or elongational deformation. As a rheological probe, the extrudate swell at low stresses was measured for the differently pretreated samples. For the L-PP, neither molecular nor rheological changes were observed. However, the extrudate swell of the LCB-PP was found to decrease with increasing volume throughput. It was more strongly affected by shear in the capillary than by molecule stretching in the entry region. The smaller extrudate swell was accompanied by a decrease of the high molar mass tail of the LCB-PP, which could be the reason for the decay of swell, in principle. However, a comparable degradation of the high molar mass tail was obtained by a pure thermal treatment that was shown to leave the extrudate swell unchanged. This result and the unaffected branching structures found by high-temperature gel permeation chromatography (HT-GPC) support the hypothesis of a change of the branching topography by the mechanical pretreatment.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 3","pages":"241 - 250"},"PeriodicalIF":2.3,"publicationDate":"2024-02-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s00397-024-01437-z.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139969691","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Frequency response analysis of the Bautista-Manero-Puig model with normal stress: analytical and numerical solution for large amplitudes 具有法向应力的 Bautista-Manero-Puig 模型的频率响应分析：大振幅的分析和数值解法

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-16 DOI: 10.1007/s00397-024-01434-2

E. Hernandez, F. Bautista, J. P. García-Sandoval, O. Manero

{"title":"Frequency response analysis of the Bautista-Manero-Puig model with normal stress: analytical and numerical solution for large amplitudes","authors":"E. Hernandez, F. Bautista, J. P. García-Sandoval, O. Manero","doi":"10.1007/s00397-024-01434-2","DOIUrl":"10.1007/s00397-024-01434-2","url":null,"abstract":"<div><p>We derive explicit analytical expressions for the recurrence relations using the analytical matrix method for frequency response and the Bautista-Manero-Puig model for complex fluids. The BMP model is derived from the Extended Irreversible Thermodynamics formalism and has been shown to be useful in predicting the complex rheological behavior of self-associative systems. All harmonics of the alternating normal and shear stresses in oscillatory shear with various amplitude oscillatory regimes (AOS) can be calculated analytically, i.e., small amplitude oscillatory shear (SAOS), medium amplitude oscillatory shear (MAOS), and large amplitude oscillatory shear (LAOS). We show that incorporating the effects of the first and second normal stress differences for all AOS regimes leads to the emergence of higher harmonics. We establish the limits between the different AOS regimes based on criteria suggested by the analytical method. For some typical systems, such as CTAB-NaSal, we found a satisfactory quantitative agreement with the measured behavior of AOS.</p></div>","PeriodicalId":755,"journal":{"name":"Rheologica Acta","volume":"63 3","pages":"219 - 240"},"PeriodicalIF":2.3,"publicationDate":"2024-02-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139765524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Theoretical study on Poiseuille flow of thixotropic yield stress fluids: an exact solution 触变屈服应力流体的 Poiseuille 流动理论研究：精确解法

IF 2.3 3区工程技术

Rheologica Acta Pub Date : 2024-02-08 DOI: 10.1007/s00397-024-01431-5

Ren Jiangtao, Yin Deshun, Zhao Bin, Ma Liangzhu

引用次数: 0