2篇
您的检索式：作者名="Rodolfo Botter"
|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | A rheological method for selecting nano-kaolin powder as filler in SBR rubber显示文摘This paper shows that the stiffness of styrene–butadiene solid rubber with added kaolin powder is related to the yield stress of kaolin dispersion in liquid polybutadiene rubber up to the percolation threshold. For five kinds of kaolin powder, the value of τ° spans the range of 100–430 Pa, while the corresponding compressive elastic constant of SBR varies from 12 to 21 MPa. A relationship between τ° and ΔE i /*E R is proposed. Critical examination of these data infers that kaolin powder dispersed in solid rubber matrix acts as an additive which decreases the random movement of the polybutadiene chains. Consequently, dispersions of nano-particles in liquid and in solid SBR are considered to be related, thus leading to a rheological method for selecting nano-particles as fillers in solid SBR. | Alberto Lagazzo Sergio Lenzi Rodolfo Botter Paolo Cirillo Fabrizio Demicheli Dario T. Beruto | 2010 | Particuology2010，8，3： | 4 |
| 2 | Yield stress measurements and microstructure of colloidal kaolin powders clusterized and dispersed in different liquids显示文摘Rheological measurements of four colloidal kaolin powders dispersed in water, paraffinic oil and liquid rubber have been done at solid concentration (VS/VL) in the range 8-33%. In quasi-static conditions the yield stress values were derived. An S-shaped relationship between and exists, that allows to evaluate the percolation threshold c values. In water c ranges between 29% and 33%, while it is between 17% and 21% in oil and in liquid rubber. In water the microstructure units, i.e. the primary clusters among kaolin crystallites, are denser and bigger than the ones in the two other liquids. Furthermore, in quasistatic condition, the aqueous microstructure units have less tendency to cling together to form a network that can span all over the liquid phase. The different kaolin dispersions at equal to 22% are characterized by yield stress ranging between 7.5 Pa and 59 Pa in water, 66-250 Pa in oil and 230-770 Pa in liquid rubber. It has been found that for any kaolin types the log evaluated near to the percolation threshold is a conservative parameter of the three different liquids. These results are useful to design colloidal dispersions with selected microstructure. | Dario T.Beruto Alberto Lagazzo Rodolfo Botter Roberto Grillo | 2009 | Particuology2009，7，6： | 1 |
您所在的机构暂未开通此部分的功能，请联系管理员