Polymer nanostructure formation in lyotropic liquid crystalline systems. (Chemistry and Chemical Engineering).Kalena D. Stovall (*), Demetrius T. McCormick, C. Allan Guymon, University of Southern Mississippi, Hattiesburg, MS 39406 Lyotropic liquid crystalline Like a crystal. It implies a uniform structure of molecules in all dimensions. For example, phase change technology, widely used for rewritable optical discs, uses crystalline spots (bits) to reflect the laser beam. Amorphous, non-crystalline bits do not reflect light. systems (LLCs) offer exciting potential as templating agents, in that discrete nanometer sized domains can be generated using the ordered LLC (Logical Link Control) See "LANs" under data link protocol. LLC - Logical Link Control morphologies as templates. This study focuses on the polymerization polymerization Any process in which monomers combine chemically to produce a polymer. The monomer molecules—which in the polymer usually number from at least 100 to many thousands—may or may not all be the same. of polar and non-polar monomers in Pluronic[R] LLC systems and understanding how the varying degree of LLC order affects the polymerization mechanism as well as the resultant polymer morphology morphology In biology, the study of the size, shape, and structure of organisms in relation to some principle or generalization. Whereas anatomy describes the structure of organisms, morphology explains the shapes and arrangement of parts of organisms in terms of such . Initial studies demonstrate that the order of the LLC mesophase has significant impact on the polymerization rate of polar monomers with accelerated polymerization rates being observed in more ordered LLC phases. For non-polar monomers, there appears to be an opposite trend with faster polymerization rates occurring in the less ordered LLC phases. This indicates that differences in monomer monomer (mŏn`əmər): see polymer. monomer Molecule of any of a class of mostly organic compounds that can react with other molecules of the same or other compounds to form very large molecules (polymers). structure affect the monomer segregation behavior which has a significant effect on the polymerization rate and will have an ultimate effect on the resultant polymer morphology. In addition, when the textures of the LLCs are examined there is a general retention of the original LLC morphology both upon addition of monomer and after polymerization. This is important because to successfully template the LLC morphology the LLC structure must be retained during the course of polymerization. This study has allowed for further understanding of the factors relating to relating to relate prep → concernant relating to relate prep → bezüglich +gen, mit Bezug auf +acc polymerizations in ordered systems and for further development of Pluronic[R] LLCs as templating agents. |
|
||||||||||||||||||||
Printer friendly
Cite/link
Email
Feedback
Reader Opinion