Korea-Australia Rheology Journal最新文献_第2页

Flow-induced demixing of polyisoprene/poly(4-tert butyl styrene) with high dynamic contrast 流动诱导高动态对比聚异戊二烯/聚（4-叔丁基苯乙烯）的脱混

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-11-25 DOI: 10.1007/s13367-024-00114-0

Zonghao Hong, Shilong Wu, Quan Chen

{"title":"Flow-induced demixing of polyisoprene/poly(4-tert butyl styrene) with high dynamic contrast","authors":"Zonghao Hong, Shilong Wu, Quan Chen","doi":"10.1007/s13367-024-00114-0","DOIUrl":"10.1007/s13367-024-00114-0","url":null,"abstract":"<div><p>This study places a focus on flow-induced demixing of polyisoprene (PI) and poly(4-tert butyl styrene) (PtBS) polymer blends with high dynamic contrast. The rheological response is governed by the more immobilized PtBS chains. In contrast, the dielectric response at low frequency reflects exclusively the normal mode of PI chains having type-A dipole parallel along the chain backbone. These features enable selective detection of the component dynamics of PtBS or PI chains under either the small amplitude oscillatory shear or the nonlinear steady shear through a combination of rheological and dielectric techniques. We find the Cox–Merz rule fails significantly for the PtBS/PI blends, which is attributed to flow-induced demixing when the shear rate is higher than the relaxation rate of PtBS chains and lower than that of PI chains. The flow-induced demixing is further supported by varying the molecular parameters of PtBS, copolymerizing PtBS with polystyrene, as well as by the rheo-dielectric measurements that show a broadening of the PI relaxation mode distribution. This demixing could be partly driven by the increased conformational entropy of the PI chains after segregation from the surrounding restrictive PtBS chains.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"37 1","pages":"19 - 28"},"PeriodicalIF":2.2,"publicationDate":"2024-11-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513133","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Recent developments on multiscale simulations for rheology and complex flow of polymers 聚合物流变和复杂流动的多尺度模拟研究进展

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-10-24 DOI: 10.1007/s13367-024-00112-2

Takeshi Sato, Kenji Yoshimoto

引用次数: 0

A review on rheological approaches as a perfect tool to monitor thermal degradation of biodegradable polymers 流变学方法是监测可生物降解聚合物热降解的理想工具

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-10-21 DOI: 10.1007/s13367-024-00111-3

Reza Salehiyan, Sanaz Soleymani Eil Bakhtiari

{"title":"A review on rheological approaches as a perfect tool to monitor thermal degradation of biodegradable polymers","authors":"Reza Salehiyan, Sanaz Soleymani Eil Bakhtiari","doi":"10.1007/s13367-024-00111-3","DOIUrl":"10.1007/s13367-024-00111-3","url":null,"abstract":"<div><p>This review provides an in-depth analysis of the thermal degradation of biodegradable polymers through rheological methods. Focusing on key techniques such as time sweep tests, frequency sweep tests, and nonlinear rheological analyses gained at higher shear tests, the review highlights how these approaches offer critical insights into polymer stability and degradation kinetics. It entails an understanding of how molecular weight reduction, a common degradation mechanism, significantly impacts the performance of biodegradable polymers, and how the use of appropriate fillers can enhance thermal stability by mitigating chain scission. The review also discusses the application of the Arrhenius equation in modelling thermal degradation, helping predict degradation rates and optimize processing conditions. Time sweep tests are particularly emphasized for their ability to monitor polymer stability under various environmental conditions, while frequency sweep tests provide insights into the effects of processing/thermal history on material degradation. Tests at higher shear rates, which simulate real-world processing conditions such as extrusion and injection moulding, are explored for their role in understanding how processing-induced shear forces accelerate polymer degradation. Various biodegradable polymers are considered in this review, with polylactic acid (PLA) being the dominant polymer studied across most research, providing a clear picture of its degradation behaviour and strategies for enhancing its thermal stability. Therefore, it is expected that this review will be a comprehensive guide for researchers and engineers looking to optimize the thermal stability and performance of biodegradable polymers in various industrial applications.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"295 - 317"},"PeriodicalIF":2.2,"publicationDate":"2024-10-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13367-024-00111-3.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Comparison of methodologies for the application of the Onsager variational principle 昂萨格变分原理应用方法的比较

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-10-04 DOI: 10.1007/s13367-024-00109-x

Kwang Soo Cho

引用次数: 0

The role of rheology in cosmetics research: a review 流变学在化妆品研究中的作用综述

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-09-29 DOI: 10.1007/s13367-024-00108-y

Juri Kim, Eun Hui Jeong, Joon Hyun Baik, Jun Dong Park

{"title":"The role of rheology in cosmetics research: a review","authors":"Juri Kim, Eun Hui Jeong, Joon Hyun Baik, Jun Dong Park","doi":"10.1007/s13367-024-00108-y","DOIUrl":"10.1007/s13367-024-00108-y","url":null,"abstract":"<div><p>Since the dawn of human civilization, cosmetics have been an important part of life for various reasons, including aesthetic purposes, skin protection, and representing social status and ideology for social and political reasons. Nowadays, due to advances in science and technology, cosmetics comes in countless distinctive formulations, each tailored to specific purposes and preferences. Rheology has been an essential tool in designing and analyzing complex cosmetic formulations, because of inherent characteristics of their usage, which inevitably involves processes of flow and deformation. Typically, the sensory texture of cosmetic formulations has been correlated with rheological measurements. Furthermore, because the physical and chemical properties, as well as the microstructural status of cosmetic formulations, are well reflected in their rheological behavior, rheology has proven to be an effective metric for assessing stability. This review aims to provide a structured overview of how rheology has been utilized in the cosmetics field and highlight its advancements. We specifically focus on the role of rheology in analyzing the sensory texture and stability in cosmetic formulations, emphasizing a variety of previous studies. In the last part, we present latest applications of rheological analysis combined with other modern techniques, including artificial intelligence and eco-friendly technologies.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"271 - 282"},"PeriodicalIF":2.2,"publicationDate":"2024-09-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875301","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

A review of rheology for ring polymers and polymers with internal loops: comparison of recent experimental and theoretical studies 环形聚合物和内环聚合物的流变学综述：最近实验和理论研究的比较

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-09-28 DOI: 10.1007/s13367-024-00110-4

Yuya Doi

{"title":"A review of rheology for ring polymers and polymers with internal loops: comparison of recent experimental and theoretical studies","authors":"Yuya Doi","doi":"10.1007/s13367-024-00110-4","DOIUrl":"10.1007/s13367-024-00110-4","url":null,"abstract":"<div><p>Polymer architecture (i.e., chain connecting manner) and properties are closely correlate, and strongly influence rheological properties that reflect microscopic molecular dynamics. This review summarizes the rheological properties of ring polymers and polymers containing intramolecular loops, which are currently being studied actively in terms of sample synthesis and physical property. The ring polymers, which have a well-defined molecular architecture and free of impurities, exhibit rheological properties that differ significantly from those of their linear counterparts. Notably, even minor contamination with linear chain impurities is known to substantially alter the rheological properties of ring polymers. Theoretical molecular modeling studies are being pursed to elucidate these behaviors. The ring polymer analogues consisting of multiple ring chains or intramolecular linkages between ring and linear chains exhibit either unentangled or intermolecular penetration behavior, depending on their molecular architectures. The polymers featuring intrinsically random intramolecular loops, such as single-chain polymeric nanoparticles (SCNPs) and polymeric nanosheets, are also under active investigation in terms of both their synthesis and properties. A deeper understanding of the molecular dynamics and rheological properties of these unique architectural polymers can contribute to the further development of polymer science and industry as well as to the creation of new polymeric nano-materials.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"283 - 294"},"PeriodicalIF":2.2,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142875298","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Nonlinear damping of associative polymers 结合聚合物的非线性阻尼

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-09-23 DOI: 10.1007/s13367-024-00107-z

Yuxuan Pei, Yanjie Zhang, Chengzhi Zheng, Jian Tang, Quan Chen

引用次数: 0

Quantification of flows in a rectangular channel of a single-screw extruder with a small helix angle based on the energy dissipation rate 基于能量耗散率的小螺旋角单螺杆挤出机矩形通道内流动定量研究

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-09-20 DOI: 10.1007/s13367-024-00106-0

Xuesi Gao, Byungmin Lee, Wook Ryol Hwang

{"title":"Quantification of flows in a rectangular channel of a single-screw extruder with a small helix angle based on the energy dissipation rate","authors":"Xuesi Gao, Byungmin Lee, Wook Ryol Hwang","doi":"10.1007/s13367-024-00106-0","DOIUrl":"10.1007/s13367-024-00106-0","url":null,"abstract":"<div><p>In this work, a systematic approach is proposed for quantifying the effective viscosity, effective shear rate, and screw characteristics of non-Newtonian fluids in an unwound rectangular channel screw flow of a metering zone of the single-screw extruder. The analyses are limited to a small helix angle case (less than 6.7 degrees), where the cross-sectional drag velocity component is small enough. We begin by separating the flow within the channel into two individual flows (the drag-driven flow and the adverse pressure-driven flow). Both the correlations between drag velocity and drag force in the drag flow and between flow rate and pressure buildup in the pressure-driven flow are investigated separately. Then, we propose mixture rules for shear rate and energy dissipation for the combined drag and (adverse) pressure-driven flows in the rectangular channel. The flow quantification approach of the combined flow is established by incorporating the correlations observed in the individual flows with a velocity ratio (the ratio of the drag velocity to the flow rate). The flow quantification method was validated using three non-Newtonian fluids (power law fluid models, a Carreau fluid model, and a regularized Herschel–Bulkley fluid model), through extensive numerical simulations with a 2.5D hybrid scheme. The proposed quantification method can be applied for estimating the relationship between torque, pressure buildup and throughput in the single-screw process with a small helix angle. Theoretical predictions agree well with numerical simulations, with maximum relative errors of 3.3%, and 11% for drag force and pressure buildup, respectively.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"37 1","pages":"67 - 79"},"PeriodicalIF":2.2,"publicationDate":"2024-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143513292","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Effect of stirring time on viscoelastic properties of liquid gallium-oxide amalgams 搅拌时间对液态氧化镓汞合金粘弹性的影响

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-09-13 DOI: 10.1007/s13367-024-00105-1

Hyeong Yong Song, Si Yoon Kim, Min Seo Park, Jun Dong Park, Kyu Hyun

{"title":"Effect of stirring time on viscoelastic properties of liquid gallium-oxide amalgams","authors":"Hyeong Yong Song, Si Yoon Kim, Min Seo Park, Jun Dong Park, Kyu Hyun","doi":"10.1007/s13367-024-00105-1","DOIUrl":"10.1007/s13367-024-00105-1","url":null,"abstract":"<div><p>This study investigated the effect of mechanical stirring time on liquid gallium (Ga)-oxide amalgams using linear and nonlinear viscoelastic properties in dynamic oscillatory shear. The liquid Ga-oxide amalgams with different stirring times were prepared by exposing liquid Ga to the atmosphere under continuous stirring. Linear viscoelasticity of all amalgams exhibited an elastic-dominant behavior. When plotted versus stirring time, elastic modulus increased gradually, which was described successfully by a power-law-type equation for a percolation behavior. The nonlinear viscoelasticity of the amalgams was analyzed using the conventional strain-sweep data and the sequence of physical processes (SPP) method. The critical strain amplitudes determined from the strain-sweep data showed that the yielding of the amalgams occurred earlier and more gradually with increasing stirring time. The SPP analysis using transient Cole–Cole plots revealed that all amalgams experienced intracycle nonlinear behavior consisting of three physical processes (recovery, elastic softening, and yielding) within an oscillation cycle. Intriguingly, the structure recovery rate evaluated by the maximum intracycle elasticity exhibited a nonmonotonic behavior, where the maximum recovery rate was achieved at the stirring time of 5 min. Finally, taking both linear and nonlinear properties, we suggested a material–property co-plot for the printability evaluation of liquid Ga-oxide amalgams.</p><h3>Graphical Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":683,"journal":{"name":"Korea-Australia Rheology Journal","volume":"36 4","pages":"375 - 386"},"PeriodicalIF":2.2,"publicationDate":"2024-09-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142178150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"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

Study of the impurity dissolution kinetics, rheological characterization, and hydrodynamic aspects during the bioleaching of iron ore pulp in a bioreactor 在生物反应器中对铁矿石矿浆进行生物浸出过程中的杂质溶解动力学、流变特性和流体力学方面的研究

IF 2.2 4区工程技术

Korea-Australia Rheology Journal Pub Date : 2024-09-09 DOI: 10.1007/s13367-024-00104-2

Luis Antonio Ramirez-Torres, Diola Marina Nuñez-Ramirez, Luis Medina-Torres, Octavio Manero

引用次数: 0