Bicone

Test principle Closing force biconical geometry cavity... 

A particular type of rheometer developed by Monsanto, now known as Alpha Technologies. The mechanical portion of the rheometer consists of a biconical disc embedded in an elastomeric specimen contained in a specially designed... 

In Ref. 15, an optical MNF hydrogen sensor was demonstrated. Similar to the MNF sensor described in the Sect. 13.4.1, this sensor monitors variation of transmission power of an MNF representing a waist of a biconical taper. The sensor is shown in... 

Xu, F. Horak, P. Brambilla, G., Conical and biconical ultra high Q optical fiber nanowire microcoil resonator, Appl. Opt. 2007, 46, 570 573... 

Broyer, E. and Macosko, C.W., Comparison of Cone and Plate. Bicone and Parallel Plates Geometries for Melt Rheological Measurements, SPEANTEC Tech. Papers, 21, 343 (1975)... 

Poly(vinyl acetate) (PVAc) is very often used for low-profile applications. At low PVAc contents, the continuous matrix is a polyester network with PVAc inclusions. Increasing the PVAc amount leads first to a bicon-tinuous structure, and then to a phase-inverted system (Chapter 8). The low-profile action is observed in the concentration range where bicontinuous structures are formed (Pascault and Williams, 2000). However, the fracture energy attains a maximum value for lower PVAc concentrations (Bucknall et al., 1991). 

No well-defined structural characterization of a bicon-tinuous microemulsion is currently available. However, it has been suggested that oil and water domains are... 

Figure 3. Shows a double logarithmic plot of shear stress against shear rate. The far left curve is taken from Ref. 4 for a SBS copolymer with 39% Styrene (see Table II) at 150°C. The two other curves represent SBS copolymer 414C at 160° and 200°C, respectively. (O) Cone and plate data, ( ) bicone data, (A) Brabender data. (—) Flow curve corresponding to the master curve for homogeneous melts shown on Figure 7.

From Figure 3 it is seen that this prediction seems to be correct for both our own data and those reported by Holden, Bishop, and Legge (d) for a SBS copolymer with 40% styrene and measured with a bicone geometry. 

Figure 2-21. Examples of m-n m symmetries from the left, pentagonal prism trigonal bipyramid bicone cylinder.

An alternative for the flat disc viscometer for liquid-liquid interfaces is the biconical disc interfacial viscometer. A disadvantage of the (thin) flat and biconical disc interfacial viscometers is the delicate placement of the disc "in" the interface. Moreover, standard theoretical analyses do not account for incomplete wetting and, for the flat disc viscometer, for the finite thickness of the disc. 

Rheometrv. The following rheometers were used in this study An Instron capillary rheometer, a Rheometries mechanical spectrometer, used in both cone and plate mode as well as in the biconical mode, and a Brabender Plastograph (4). 

FIG. 4.22 Schematic of biconical tool for surface rheology measurements using the Paar Physica interfacial rheometer. (Courtesy of American Institute of Physics.)... 

A biconical disk interfacial rheometer is available from Anton Paar, known as the Physica Interfacial Rheology System (IRS). A schematic of the rheometer tool is shown in Figure 4.22. Current specifications of the instrument include a torque range of 0.02 xNm to 150 mNm with temperature control from 5 to 70°C. All rheological test modes are available for the interfacial rheometer including oscillatory testing [59],... 

In contrast to linear coil, the triblock molecule 23, consisting of bis(penta-ethylene glycol) dendrons as coil segments at both ends of the rod with same rod building block, self-organizes into 2D columnar and 3D bicon-... 

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