Journal of the Society of Rheology, Japan最新文献_第10页

Effect of the Particle Size on the Rheology of Gellan Gum Micro Gel 粒径对结冷胶微凝胶流变性的影响

Journal of the Society of Rheology, Japan Pub Date : 2003-01-01 DOI: 10.1678/RHEOLOGY.31.337

Riwako Nakamoto, Ryoji Yasue

{"title":"Effect of the Particle Size on the Rheology of Gellan Gum Micro Gel","authors":"Riwako Nakamoto, Ryoji Yasue","doi":"10.1678/RHEOLOGY.31.337","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.31.337","url":null,"abstract":"Focusing on the particle size of gellan gum microgel fluid dispersion, we found that even with the same composition, the appearance and rheological characteristics of microgel fluid dispersion were different depending on the difference of particle size. Comparison among rheological characteristics indicated that the greater the particle size of microgel was, the larger the yield stress and shear stress during flowage were and that there was an appropriate correlation (r=0.97) between the particle size of microgel and the yield stress of fluid dispersion. It was observed that among microgel fluid dispersion samples having the same particle size, the less concentration of calcium ions added as crosslinker for double helix they had, the greater shear stress they showed. We considered it as an influence of interaction among microgel particles. We found that the control of the particle size of microgel fluid dispersion and the calcium ion concentration was effective as a method of controlling the properties of microgel fluid dispersion. Microgel particles with smaller size decrease the yield stress of fluid dispersion, deteriorating the dispersion stability of dispersoid. However, by including the dispersoid in microgel particles, we could prepare a product providing a compatibility between the product appearance and stability.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84309299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Rheology of entangled polymeric liquids: Current molecular pictures and problems 纠缠聚合物液体的流变性:当前的分子图像和问题

Journal of the Society of Rheology, Japan Pub Date : 2003-01-01 DOI: 10.1678/RHEOLOGY.31.3

H. Watanabe

引用次数: 5

The Present Status and Prospect of Suspension Rheology. 悬浮液流变学的现状与展望。

Journal of the Society of Rheology, Japan Pub Date : 2003-01-01 DOI: 10.1678/RHEOLOGY.31.15

Y. Otsubo

{"title":"The Present Status and Prospect of Suspension Rheology.","authors":"Y. Otsubo","doi":"10.1678/RHEOLOGY.31.15","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.31.15","url":null,"abstract":"Particles dispersed in a liquid tend to form flocs due to attractive forces between particles. The rheological properties of suspensions depend on the dynamic structures of flocs in shear fields. Main task of suspension rheology is to establish the quantitative relation among the mechanical properties of particle bond, geometrical structures of flocs, and macroscopic rheology. For understanding of current status of suspension rheology, the fundamental properties of ordinary flocculated suspensions are summarized. The most important aspect is that the particle bonds are not broken down in a quiescent state. Hence, the gross structure of flocs may be statistically invariant. The relation between rheology and floc structure is discussed on the basis of fractal and percolation concepts. The suspensions flocculated by polymers show interesting rheological behavior. For example, the suspensions flocculated by reversible bridging are Newtonian at low shear rates and shear-thickening at high shear rates, whereas the ordinary flocculated suspensions are shear-thinning in a wide range of shear rates due to the progressive breakdown of flocs. Since the particle-particle interactions are strongly influenced by adsorption affinity for surfaces, the flocculation induced by polymer has great potential as a new technique in rheology control of suspensions. The unique rheological behavior can be directly connected with the mechanical properties of the bonds between two primary particles. The physical quantities which determine the floc structures and rheological properties are the transverse and central components of attractive force between particles. The importance of vector nature of particle bonds is demonstrated, with a perspective of quantitative understanding of suspension rheology.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77296529","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Rheological and Mechanical Properties of Particle Filled Elastomers 颗粒填充弹性体的流变学和力学性能

Journal of the Society of Rheology, Japan Pub Date : 2003-01-01 DOI: 10.1678/RHEOLOGY.31.329

Kazuyuki Shohara, K. Uotani, H. Yamane

{"title":"Rheological and Mechanical Properties of Particle Filled Elastomers","authors":"Kazuyuki Shohara, K. Uotani, H. Yamane","doi":"10.1678/RHEOLOGY.31.329","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.31.329","url":null,"abstract":"Rheological and mechanical properties and particle dispersion state of silicone resin filled with various silica particles were investigated before and after crosslinking. Uncrosslinked resin filled with smaller particles at higher content showed higher storage modulus G' and complex viscosity |η*| at lower frequency region and a second plateau was observed. When the particle size is almost identical, particle with hydrophilic surface made G' and |η*| slightly higher. From those results, liquid matrix containing smaller particles at higher content has stronger three-dimensional structure. This structure seems to be stronger in the hydrophobic matrix filled in the hydrophilic particles. On the other hand, small hydrophobic particles increased the storage modulus E' of crosslinked resin at the rubbery region. These increases in E' at the rubbery region reflect the increases in the tensile modulus and strength of particle filled elastomers in the tensile test. These results suggested that the three-dimensional network structure formed with hydrophilic particles in hydrophobic matrix increased elastic character when the matrix is uncrosslinked. However, once matrix is crosslinked, adhesion between particles and matrix enhances the mechanical properties.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2003-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74436010","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Birefringence of Aqueous Surfactant Solution in the Vicinity of a Slit Exit 表面活性剂水溶液在狭缝出口附近的双折射

Journal of the Society of Rheology, Japan Pub Date : 2003-01-01 DOI: 10.1678/RHEOLOGY.31.99

Hideo Asama, T. Hasegawa, T. Narumi

引用次数: 2

Evaluation of Thermal Endurance Characteristics of Expanded Polystyrene Foams by Dynamic Compression Modulus 用动态压缩模量评价膨胀聚苯乙烯泡沫塑料的热耐久特性

Journal of the Society of Rheology, Japan Pub Date : 2003-01-01 DOI: 10.1678/RHEOLOGY.31.109

H. Adachi, Teruo Hasegawa

引用次数: 2

Steady Planar Elongational Viscosity of CTAB/NaSal Aqueous Solutions Measured in a 4-Roll Mill Flow Cell. 在四辊轧机流池中测量CTAB/ nose水溶液的稳定平面伸长粘度。

Journal of the Society of Rheology, Japan Pub Date : 2002-12-15 DOI: 10.1678/RHEOLOGY.30.283

Manabu Kato, Tsutomu Takahashi, M. Shirakashi

引用次数: 14

Observation of Coalescence of Two Polyisobutylene Droplets in Polydimethylsiloxane under Large Step Shear Strain 大阶剪切应变下聚二甲基硅氧烷中两个聚异丁烯液滴聚结的观察

Journal of the Society of Rheology, Japan Pub Date : 2002-02-15 DOI: 10.1678/RHEOLOGY.30.45

Kenzo Okamoto, Ryota Tamura, M. Ishikawa

引用次数: 4

Study of the Flow in a Dual Cavity Slot Die. 双腔槽型模具的流动研究。

Journal of the Society of Rheology, Japan Pub Date : 2002-01-01 DOI: 10.1678/RHEOLOGY.30.179

T. Tsuda, T. Hasegawa, T. Narumi

引用次数: 1

Rheological Properties and Fiber Dispersion and Orientation in Potassium Titanate Whisker Filled Polyoxymethylene Melts. 钛酸钾晶须填充聚乙烯熔体的流变性能及纤维分散取向。

Journal of the Society of Rheology, Japan Pub Date : 2002-01-01 DOI: 10.1678/RHEOLOGY.30.33

Wanhu Zhang, H. Yamane, Masaoki Takahashi

{"title":"Rheological Properties and Fiber Dispersion and Orientation in Potassium Titanate Whisker Filled Polyoxymethylene Melts.","authors":"Wanhu Zhang, H. Yamane, Masaoki Takahashi","doi":"10.1678/RHEOLOGY.30.33","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.30.33","url":null,"abstract":"Dynamic viscoelastic properties, steady shear and biaxial extensional flow behaviors have been investigated for melts of potassium titanate whisker filled polyoxymethylene. A second plateau appears in the low frequency region of the storage modulus G', and the plateau value increases with whisker content. Addition of the whisker also increases the steady shear viscosity and the low strain rate asymptote of the biaxial extensional viscosity. The upturn of biaxial extensional viscosity from the low strain rate asymptote decreases by the addition of whisker due to suppression of polymer chain extension. Change in whisker dispersion and orientation in the melts was observed with scanning electron microscopy after quenching the samples in biaxial extensional flow. The degree of whisker orientation to the flow direction decreases with increasing strain rate in the range where the strain rate is much greater than the rate of whisker orientation and it is smaller than or comparable with the relaxation rate of the matrix chain. It is suggested that the matrix does not have enough power to orient the whisker in this range of strain rate.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2002-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86726096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0