Journal of the Society of Rheology, Japan最新文献_第7页

The Yield Stress of a Soft and Water Swellable Microgel Aqueous Suspension in Semi-Dilute Regime 半稀释条件下软质水溶胀微凝胶水悬浮液的屈服应力

Journal of the Society of Rheology, Japan Pub Date : 2006-01-01 DOI: 10.1678/RHEOLOGY.34.77

I. Kaneda

引用次数: 3

The Gelation Mechanism of Non-Water Gel Comprising PEG 含聚乙二醇的非水凝胶的凝胶机理

Journal of the Society of Rheology, Japan Pub Date : 2006-01-01 DOI: 10.1678/RHEOLOGY.34.83

T. Nihei, Y. Yamagata, Nobuyuki Yamamoto

引用次数: 1

Nonlinear rheology and retraction of entangled thread-like micelles 缠结丝状胶束的非线性流变与回缩

Journal of the Society of Rheology, Japan Pub Date : 2006-01-01 DOI: 10.1678/RHEOLOGY.34.165

A. Takagi, Hiroshi Sasaki, A. Kuriyama, Yumi Matsumiya, Tadashi Inoue, H. Watanabe

{"title":"Nonlinear rheology and retraction of entangled thread-like micelles","authors":"A. Takagi, Hiroshi Sasaki, A. Kuriyama, Yumi Matsumiya, Tadashi Inoue, H. Watanabe","doi":"10.1678/RHEOLOGY.34.165","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.34.165","url":null,"abstract":"Aqueous solutions of thread-like micelles of cetyltrimethylammonium bromide (CTAB) and sodium salicylate (NaSal) are known to be classified into three types depending on their rheological properties that change with the concentration ratio of salt to detergent: When the concentration of NaSal, CS, is much lower than that of CTAB, CD, the dynamic modulus, G*, is similar to that of dilute polymer solutions without entanglements (Type I). With increasing salt concentration (CS < CD), G* becomes similar to that of entangled semidilute polymer solutions (Type II). For the case of CS ≥ CD, G* is described with the Maxwell model having a single relaxation time (Type III). In this study, nonlinear viscoelastic behavior of type II solutions was examined. G* for the solution with CD = 1.0×10−1 molL−1 and CS = 3.25 ×10−2 molL−1 was very similar to that of the ordinary entangled polymer solutions. The damping function determined from the stress relaxation experiments was close to that of the entangled polymers and well described with the Doi-Edwards model. The characteristic time for nonlinear rheology, τeq, was determined from the stress overshoot of viscosity growth function. τeq was found to be about thirty times smaller than the characteristic time for nonlinear stress relaxation. These features were in accord with those of the ordinary entangled polymer solutions. However, shear rate dependence of the steady viscosity was not described with the Cox-Merz rule, suggesting that a shear induced structure might have been developed at long times during a steadily flowing state.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84009092","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: 4

フィルムの成形加工レオロジー（1） ―逐次二軸延伸過程におけるフィルムの高次構造変化― 胶片成型加工流变学(1)逐级双轴延伸过程中胶片的高阶结构变化

Journal of the Society of Rheology, Japan Pub Date : 2005-10-05 DOI: 10.1678/RHEOLOGY.33.161

英昭石原, 未秋柴谷, 法葭原

{"title":"フィルムの成形加工レオロジー（1） ―逐次二軸延伸過程におけるフィルムの高次構造変化―","authors":"英昭石原, 未秋柴谷, 法葭原","doi":"10.1678/RHEOLOGY.33.161","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.33.161","url":null,"abstract":"Studies on high-order structures of poly(ethylene terephtalate) films prepared by uniaxial and biaxial stretching processes were done using Small-Angle Light Scattering(SALS). On uniaxial stretching, a butterfly shape was obtained in the Hv light scattering pattern, which indicated the existence of a sheaflike crystalline high-order structure in the stretched films. Numerical calculations based on the sheaf array model were carried out for the interpretation of experimentally obtained SALS patterns. Results of the calculated patterns showed good agreement with experimental ones. In the case of biaxially stretched films, the SALS patterns changed remarkably depending on the stretching conditions and stretching systems. Higher stretching temperatures were found to be effective in the two-way successive stretching system since the high-order structure formed at the initial uniaxial stretching was not easily destroyed by the second stretching. Further, it became obvious that a three step stretching system in which machine direction stretching was divided into two steps was effective in obtaining biaxially stretched films having 8 leaf SALS patterns including the butterfly shape.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81644585","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: 3

Coalescence behavior of dispersed domains in immiscible polymer blends having broad size distribution 宽尺寸分布的非混相聚合物共混物中分散畴的聚结行为

Journal of the Society of Rheology, Japan Pub Date : 2005-05-02 DOI: 10.1678/RHEOLOGY.33.37

Yoshiaki Takahashi, Tsuyoshi Kato

{"title":"Coalescence behavior of dispersed domains in immiscible polymer blends having broad size distribution","authors":"Yoshiaki Takahashi, Tsuyoshi Kato","doi":"10.1678/RHEOLOGY.33.37","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.33.37","url":null,"abstract":"Coalescence process of a immiscible polymer blend having broad distribution of domain size, which is a 1:1 mixture of two pre-sheared polymer blends is compared with those of the two pre-sheared samples having narrow size distributions. Component samples used are polydimethylsiloxane (PDMS: viscosity 27.1 Pa·s) and hydrocarbon-formaldehyde resin (Genelite: viscosity 10.5 Pa·s). The weight ratio of PDMS:Genelite was 7:3 and shear rates of pre-shear are 2.4 and 4 s-1. The coalescence process was observed under steady shear flow with 0.8 s-1. It was observed that the coalescence between large and small domains more frequently occur in the blend sample with broad size distribution than those of similar size domains in the blend samples with narrow size distribution. As a result, initial coalescence rate became faster for the blend with broad distribution than that with narrow size distributions. Moreover, the size distribution after a long time of flow are different for the samples with broad and narrow size distributions, though the average radius are similar, implying that the domain structure of immiscible polymer blends with broad size distribution cannot be well controlled by the flow at low shear rates.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86106105","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: 3

Electrorheological Response of Silicone Oil Suspension of Barium Strontium Titanate Particles with Different Surface Compositions 不同表面组成钛酸钡锶颗粒硅油悬浮液的电流变响应

Journal of the Society of Rheology, Japan Pub Date : 2005-01-01 DOI: 10.1678/RHEOLOGY.33.285

Yoshio Kobayashi, Ryusuke Morimoto, K. Moriyama, T. Satoh, M. Konno

引用次数: 0

Studies on mechanical and physicochemical properties of polymer gels 高分子凝胶的力学和物理化学性质研究

Journal of the Society of Rheology, Japan Pub Date : 2005-01-01 DOI: 10.1678/RHEOLOGY.33.257

K. Urayama

{"title":"Studies on mechanical and physicochemical properties of polymer gels","authors":"K. Urayama","doi":"10.1678/RHEOLOGY.33.257","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.33.257","url":null,"abstract":"The three topics in our study are reviewed in the present paper: (1) molecular understandings of rubber elasticity of end-linked polymer networks and the dynamics of trapped guest chains; (2) elastomers with remarkable extensibility or high damping insensitive to both frequency and temperature via topology control of polymer networks; (3) phase transition in polymer network systems such as sol-gel transition and volume phase transition driven by nematic-isotroptic transition. On the basis of the biaxial elongation data of end-linked polydimethylsiloxane (PDMS) networks, the form of the strain energy density function is evaluated, and the five entanglement models of rubber elasticity are unambiguously assessed. It is shown that the dynamics of linear guest chains trapped in crosslinked networks obey the reptation concept. A dramatic slowing down of the reptation is observed in the host network whose mesh size is smaller than the entanglement spacing. The deswollen networks, prepared by end-linking long precursors in the diluted state and removing the solvent, exhibit a marked extensibility over 3000% as well as a very weak strain dependence of stress. These features stem from a small amount of trapped entanglement and a compact conformation of network chains. The damping of irregular networks containing many pendant chains increases with the amount of pendant chains. The damping is very weak dependent of temperature and frequency as a result of a slow viscoelastic relaxation of irregular network structures. The nematic networks swollen in nematic or isotropic solvents undergo a phase transition between the swollen isotropic and shrunken nematic states.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"72812807","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: 3

Structure Control of Agglomerative Slurry of Mono-modal Particles by Spin Coating 旋涂法控制单模态颗粒凝聚浆的结构

Journal of the Society of Rheology, Japan Pub Date : 2005-01-01 DOI: 10.1678/RHEOLOGY.33.279

Hiroshi Yoshiba, Y. Komoda, H. Imakoma, H. Usui

引用次数: 4

ゾル－ゲル法を用いた有機・無機ハイブリッドマイクロカプセルの調製と電気レオロジー流体粒子への応用利用溶胶-凝胶法制备有机-无机混合微胶囊及其在电流变流体粒子中的应用

Journal of the Society of Rheology, Japan Pub Date : 2005-01-01 DOI: 10.1678/RHEOLOGY.33.23

矢野彰一郎, 康司大塚, 章子川合, 俊紀萩原, 孝志澤口

{"title":"ゾル－ゲル法を用いた有機・無機ハイブリッドマイクロカプセルの調製と電気レオロジー流体粒子への応用","authors":"矢野彰一郎, 康司大塚, 章子川合, 俊紀萩原, 孝志澤口","doi":"10.1678/RHEOLOGY.33.23","DOIUrl":"https://doi.org/10.1678/RHEOLOGY.33.23","url":null,"abstract":"Micro-capsules composed of poly(methyl metacrylate) (PMMA) or poly(vinyl acetate) (PVAC) as core materials, and silica as wall material were produced by sol-gel process. PMMA or PVAC emulsions were covered with silica derived from tetraethoxysilane by sol-gel process, and microcapsules with diameter of about 10-30 μm were obtained. These micro-capsules were dispersed in silicone oil with concentration of 30 wt% to prepare electro-rheological (ER) fluid. When DC or AC electric fields were applied on these fluids, the shear stress of the system increased, and ER effect was observed. In the case of PMMA micro-capsule, the shear stress of the system under AC electric field increased with shear rate, and higher than that under DC electric field. PVAC micro-capsule/silicone oil fluid showed Bingham flow under DC electric field, and shear stress was higher than that of PMMA system. PVAC micro-capsule/silicone oil system showed the dip behavior under AC electric field at higher shear rate region of 540-600 s-1 caused by destruction and reformation of the structure, and the stress was lower than that of PMMA system above 150 s-1. Organic-inorganic micro-capsules produced by the sol-gel process were effective dispersoids for ER fluid.","PeriodicalId":17434,"journal":{"name":"Journal of the Society of Rheology, Japan","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2005-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91163553","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: 4

Toward a Theoretical Understanding of the Colloidal Glass Transition 对胶体玻璃转变的理论认识

Journal of the Society of Rheology, Japan Pub Date : 2005-01-01 DOI: 10.1678/RHEOLOGY.33.113

M. Tokuyama

引用次数: 1