Polymeric microstructure

Fig. 7. Demonstration unit of a membrane module with a dense, thin polymeric membrane and polymeric microstructured support...

The number of monomers in a macromolecule N is its degree of poly-merization. Some polymer characteristics, such as degree of polymerization, microstructure, architecture and chemical composition are fixed during polymerization. These characteristics control many important properties of polymeric materials. 

Kim E, Xia Y, Whitesides GM (1995) Polymeric microstructures formed by moulding in capillaries. Nature 376 581-584... 

Shish-Kebab structure shish-k3- bab n. A term borrowed from the broiling kitchen to designate a polymeric microstructure in which the random-coil chain of an amorphous polymer (shish) has been interlaced with crystalline cross-segments (kebab) produced by shearing the polymer in the molten condition or in solution. The string-of-lumps microstructure so resembles the edible dehcacy that its borrowed name seems quite apt. Ehas HG (1977) Macromolecules, vols 1—2. Plenum Press, New York. 

Figure 3. Colorimetric response for the polymerized microstructures as a function of solution pH.

S. Giselbrecht, Polymere, mikrostrukturierte zellkulturtrager fiir das tissue engineering [Polymeric, microstructured tissue culture substrates for tissue engineering]. Dissertation, Universitat Karlsruhe Karlsruhe, Germany, 2005. 

This sequence allowed us to produce well-defined 3D polymeric microstructures with arbitrary binary protein patterns (Figure 9.3). Such materials can find applications in the area of cell biology, in particular to manipulate the fate of cells as it is known that their behavior depends on geometrical, mechanical and chemical external cues. 

Figure 33 Images of polymeric microstructures fabricated by SAMIM. (a-<) SEM images of quasi three-dimensional structures in photoresist (Microposit 1805, Shipley 1.6(im thick) spin-coated on Si/SiOz, polystyrene (PS, Goodfellow 2.0 pm thick), and ABS (Goodfellow 0.85 pm thick), respectively.

The elasticity of the material used in TPP is an important parameter to characterize, if microstructures fabricated with this technique are intended to be used as mechanical devices, such as for example valves, springs, cantilevers, and manipulators. The Young s modulus of polymeric microstructures larger than a few microns can be considered identical to that of the bulk polymer [107]. However, a significant difference between the elasticity of the bulk polymer and that of the microstructure was observed when at least one of its dimensions is smaller than 1pm [108, 109]. 

Chen, Y.S Tal, A., Torrance, D.B., and Kuebler, S,M. (2006) Fabrication and characterization of three-dimensional sUver-coated polymeric microstructures. Adv. Func. Mater., 16 (13), 1739-1744. 

Solution Properties of Polymers Recent Advances in Free Radical Polymerization Microstructure of Proteins Novel Polymerization Problems in Polymerization Absorption of Macromolecules... 

Surface curvature is optimized by choosing synthesis conditions that result in particulate as opposed to polymeric microstructures. Particulate microstructures provide positive curvature surfaces (except in regions of neck... 

Shah, J., Y.-C. Su, and L. Lin, Implementation and Analysis of Polymeric Microstructure Replication by Micro Injection Molding, Proceedings of ASME Micro-Electro-Mechanical Systems, Nashville, TN, 295-302,1999. 

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