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Relevant academic research and scientific papers

Polymerization and characterization of self-assembled β-cyclodextrin- threaded chiral monomers

A helical inclusion complex polymer was fabricated through the polymerization of β-cyclodextrin-threaded chiral monomers. The photo induced polymerization of inclusion complex clusters caused shrinkage of the polymer and decreased the pitches, leading to the disappearance of spring-like construction under TEM. From the results of circular dichroism of the inclusion complex polymer, the helical construction was confirmed, and an entanglement of the polymer chains is proposed. After removal of the β-cyclodextrins from the pendant groups of the inclusion complex polymer, the helical structure was found to be maintained. The highly ordered molecular arrangement of β-cyclodextrins removed from the inclusion complex polymer was confirmed using POM. Here we demonstrate the fabrication of helical polymer fibers composed of entangled polymers through self-assembled β-cyclodextrin- threaded chiral monomers. The helical polymer construction was maintained by the entwisted polymer chains even after the removal of β-cyclodextrins from the pendant groups of the inclusion complex polymer.

Compounds and their application as well as a method of producing liquid crystalline polymers therefrom

The invention relates to compounds with the general formula Y1 --A1 --M1 --A2 --Y2 wherein Y1 and Y2 are different from each other and Y1 is an acrylate or methacrylate residue and Y2 is a vinyl ether, epoxy, or azide residue, A1 and A2 are identical or different residues with the general formula Cn H2n in which n is a whole number from 0 to 20 and one or more methylene groups can be replaced by oxygen atoms, and M1 has the general formula --R1 --X1 --R2 --X2 --R3 --X3 --R4 -- wherein R1, R2, R3, and R4 are identical or different doubly bonded residues from the group --O--, --COO--, --CONH--, --CO--, --S--, --C C--, --CH=CH--, --CH=N--, --CH2 --, --N=N--, and --N=N(O)--, and R2 --X2 --R3 can also be a C--C bond, and X1, X2, and X3 are identical or different residues from the group 1,4-phenylene, 1,4-cyclohexylene; arylalkane or heteroarylalkane with 1 to 10 carbon atoms which contains one to three heteroatoms from the group O, N, and S, substituted with B1, B2, and/or B3 ; and cycloalkylene with 1 to 10 carbon atoms and substituted with B1, B2, and/or B3, wherein B1, B2, and B3 can be identical or different substituents from the group --H, C1 -C20 -alkyl, C1 -C20 -alkoxy, C1 -C20 -alkylthio, C1 -C20 -alkylcarbonyl, C1 -C20 -alkoxycarbonyl, C1 -C20 -alkylthiocarbonyl, --OH, halogen (fluorine, chlorine, bromine, iodine), --CN, --NO2, cycloalkyl, formyl, acetyl, and alkyl, alkoxy, or alkylthio residues with 1-20 carbon atoms interrupted by ether oxygen, thioether sulfur, or ester groups.