摘要:
A soluble rigid-rod macromonomer is provided which has the following formula: ##STR1## wherein each A.sub.1, A.sub.2, A.sub.3, and A.sub.4, on each monomer unit, independently, is C or N, and each G.sub.1, G.sub.2, G.sub.3, and G.sub.4, on each monomer unit, independently, is H or a solubilizing side group, provided that at least one monomer unit has at least one solubilizing side group. The solubilizing side groups provide the macromonomers with a solubility of at least 0.5% by weight in the solvent system from which they are formed. E is a reactive end group, and the macromonomer has an average degree of polymerization, DP.sub.n, greater than 6. Such macromonomers are chemically incorporated into polymer systems to provide stronger stiffened polymers.
摘要:
A soluble rigid-rod macromonomer is provided which has the following formula: ##STR1## wherein each G.sub.1, G.sub.2, G.sub.3, and G.sub.4, on each monomer unit, independently, is H or a solubilizing side group, provided that at least one monomer unit has at least one solubilizing side group. The solubilizing side groups provide the macromonomers with a solubility of at least 0.5% by weight in the solvent system from which they are formed. E is a reactive end group, and the macromonomer has an average degree of polymerization, DP.sub.n, greater than 6. Such macromonomers are chemically incorporated into polymer systems to provide stronger stiffened polymers.
摘要:
Novel polycyanate and polycyanamide compositions containing one or more rodlike mesogenic moieties, when cured, result in products having improved properties.
摘要:
Rigid-rod macromonomers, and methods for preparing such macromonomers, having a polyaromatic backbone, solubilizing side groups, and reactive end groups are provided. The macromonomers are chemically incorporated into polymer systems to provide stronger, stiffened polymers.
摘要:
A novel photosensitive adhesive composition including the following components (A), (B), (C), and (D): Component (A): a polymer having a structural unit of the following formula (1) and a structure of the following formula (2) at a terminal, Component (B): a polymer having the structural unit of formula (1), and a carboxy group or hydroxy group at a terminal, Component (C): a radical photopolymerization initiator, and Component (D): a solvent, wherein the content by mass of the component (B) is larger than that of the component (A), (wherein X is a C1-6 alkyl group, a vinyl group, an allyl group, or a glycidyl group, m and n are each independently 0 or 1, Q is a divalent C1-16 hydrocarbon group, Z is a divalent C1-4 linking group, the divalent linking group being bonded to an —O— group in formula (1), and R1 is a hydrogen atom or a methyl group.)
摘要:
Copolymers of formula (I): where each A is S, Se or C═C; each x is an integer from 1 to 4; each R1 is independently H, F, CN or a C1-C20 linear or branched aliphatic group; Ar is one or more substituted or unsubstituted aromatic units; and, n is an integer 5 or greater, can be formed into films or membranes that are useful as active layers in organic electronic device, such as PV solar cells, providing high power conversion efficiencies and good thermal stability. Such copolymers may be synthesized from monomers of formula (II): by Stille or Suzuki coupling reactions. Such monomers may be synthesized by a variation of the Pinner synthesis.
摘要:
Methods for preparing rigid-rod macromonomers having a polyaromatic backbone, solubilizing side groups, and reactive end groups are provided. Such methods include catalytic reductive coupling of substituted 1,4-dihaloaromatic compounds in the presence of an endcapping moiety.
摘要:
Copolymers of formula (I): where each A is S, Se or C═C; each x is an integer from 1 to 4; each R1 is independently H, F, CN or a C1-C20 linear or branched aliphatic group; Ar is one or more substituted or unsubstituted aromatic units; and, n is an integer 5 or greater, can be formed into films or membranes that are useful as active layers in organic electronic device, such as PV solar cells, providing high power conversion efficiencies and good thermal stability. Such copolymers may be synthesized from monomers of formula (II): by Stille or Suzuki coupling reactions. Such monomers may be synthesized by a variation of the Pinner synthesis.
摘要:
According to one embodiment, the disclosure relates to a dendrimer complex usable for transfection of a cell and including a nucleic acid to be transfected non-covalently bound to a triazine dendrimer vector. According to another embodiment, the disclosure provides a method of transfecting a cell by contacting the cell with a dendrimer complex as described above. After the contact, the dendrimer complex enters the cell. According to a third embodiment, the disclosure relates to a method of making a triazine dendrimer complex for cell transfection by covalently bonding a series of triazine monomers to a central monomer through a series of reactions to form a triazine dendrimer, then non-covalently bonding a nucleic acid to the dendrimer to form a triazine dendrimer complex operable to transfect a cell.