Polymerization dynamics

Polymerization Dynamics. Relationships presented were utilized for the simulation of monomer concentration, number and weight average molecular weights, and population density distributions for two experimental observations. Experimental values of these variables are in reasonable proximity of calculated values. 

Probing Polymerization Dynamics with Molecular Rotors. 289... 

With further understanding how molecular rotors interact with their environment and with application-specific chemical modifications, a more widespread use of molecular rotors in biological and chemical studies can be expected. Ratiometric dyes and lifetime imaging will enable accurate viscosity measurements in cells where concentration gradients exist. The examination of polymerization dynamics benefits from the use of molecular rotors because of their real-time response rates. Presently, the reaction may force the reporters into specific areas of the polymer matrix, for example, into water pockets, but targeted molecular rotors that integrate with the matrix could prevent this behavior. With their relationship to free volume, the field of fluid dynamics can benefit from molecular rotors, because the applicability of viscosity models (DSE, Gierer-Wirtz, free volume, and WLF models) can be elucidated. Lastly, an important field of development is the surface-immobilization of molecular rotors, which promises new solid-state sensors for microviscosity [145]. 

Haidekker MA, Lichlyter D, Ben Johny M, Grimes CA (2006) Probing polymerization dynamics with fluorescent molecular rotors and magnetoelastic sensors. Sensor Lett 4 257-261... 

Figure 18. Calculated polymerization dynamics of trcin -butadiene. Arrows indicate the electronic doublets that are moving from the 1-2 and 3 7t bonds characteristic of the isolated molecule, to the new polymer position. In particular, the doublets that migrated to the molecule ends and that are ready to give the new C—C bond with the neighboring molecule should be noted.

Recently, rare-earth metal complexes have attracted considerable attention as initiators for the preparation of PLA via ROP of lactides, and promising results were reported in most cases [94—100]. Group 3 members (e.g. scandium, yttrium) and lanthanides such as lutetium, ytterbium, and samarium have been frequently used to develop catalysts for the ROP of lactide. The principal objectives of applying rare-earth complexes as initiators for the preparation of PLAs were to investigate (1) how the spectator ligands would affect the polymerization dynamics (i.e., reaction kinetics, polymer composition, etc.), and (2) the relative catalytic efficiency of lanthanide(II) and (III) towards ROPs. 

Hunter, A. W., and Wordeman, L. (2000). How motor proteins influence microtubule polymerization dynamics./ Cell Sci. 113, 4379-4389. 

MT in the cell [5,10]. The interference with microtubule polymerization dynamics is regarded as the basis of drug activity rather than their effect on MT polymer mass. 

In addition, docking the EC-derived near-atomic resolution structures of tubulin into cryoelectron microscopy maps of MT, has provided more precise insights into the structure of MT, their polymerization dynamics and the way how normal MT behavior is disrupted by antimitotic drugs [23, 24],... 

Desai A, Mitchison TJ. Microtnbnle polymerization dynamics. Annu. Rev. Cell Dev. Biol. 1997 13 83-117. 

By studying the temperature effect on the polymerization of a-methylstyrene, the relation between the model parameter and temperature has been obtained. Knowledge of this parameter allows for further calculations of the polymerization dynamics at different temperatures. Moreover it suggests an interrelation between the average size of the polymer distribution and the reaction coordinate between... 

Selden LA, Kinosian HJ, Estes JE, Gershman LC (1999) Impact of profilin on actin-bound nucleotide exchange and actin polymerization dynamics. Biochemistry 38 2769-2778 Sharma A, Lambrechts A, Hao le T, Le TT, Sewry CA, et al (2005) A role for complexes of survival of motor neurons (SMN) protein with gemins and profilin in neurite-Uke cytoplasmic extensions of cultured nerve cells. Exp Cell Res 309 185-197... 

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