Abstract:
A polyrotaxane which has enhanced solubility and is soluble in various solvents, 2) a polyrotaxane which is reversibly responsive to an external stimulus, 3) a chemically crosslinked polyrotaxane which has a high Young's modulus and a high elongation and has a high transmittance, and/or 4) a chemically crosslinked polyrotaxane which is reversibly responsive to an external stimulus; and/or a material containing any of these; and/or processes for producing these. The polyrotaxanes each comprises: a pseudo-polyrotaxane having a structure constituted of cyclic molecules and a linear molecule with which the holes of the cyclic molecules are pierced to form a clathrate; and a blocking group disposed at each end of the pseudo-polyrotaxane so as to prevent the cyclic molecules from leaving. The cyclicmolecules have a functional group represented by the following formula (I) and at least one functional group selected among functional groups represented by the following formulae (II-1) to (II-6) .
Abstract:
The present invention provides a photo cured product having both excellent toughness and high strength, and also provides a photocurable composition for forming said photocured product. The present invention provides a photocurable composition comprising: A. a (meth) acrylic acid ester monomer, wherein the glass transition temperature of a polymer formed from only said monomer is 20°C or higher; B. a polyrotaxane obtained by respectively placing blocking groups at both ends of a pseudo-polyrotaxane, which is obtained by threading a linear molecule through the hole of a cyclic molecule, so as not to release the cyclic molecule, wherein the cyclic molecule has a (meth) acrylic group; and C. a photopolymerization initiator. The present invention also provides a photocured product formed from said composition.
Abstract:
The present invention aims to provide a polyester resin composition capable of producing a molded article having excellent stretchability. The present invention also aims to provide a molded article including the polyester resin composition. The present invention relates to a polyester resin composition including: a polyester resin; and a polyrotaxane that has a cyclic molecule, a linear molecule threading through a cavity of the cyclic molecule in a skewered manner, and capping groups capping both ends of the linear molecule.
Abstract:
The present invention provides a material of high toughness that could not have been provided by an epoxy resin alone. The present invention provides a crosslinking composition having (A) one or more polyrotaxanes in which end-capping groups which prevent dissociation of the linear group are situated at both ends of a pseudo-polyrotaxane formed by inclusion of a linear molecule in the opening of a cyclic molecule by being threaded therethrough, the polyrotaxane having on the cyclic molecule a functional group that is capable of reacting with the oxirane group and/or the oxetane group, the functional group being one or more selected from the group consisting of carboxylic acid groups, carboxylate groups, primary amine groups, secondary amino groups, tertiary amino groups, phenol groups, the oxirane group, and the oxetane group, and (B) a compound having two or more oxirane groups and/or oxetane groups; and a crosslinked product employing the composition.
Abstract:
The present invention aims to provide a method for producing a polyrotaxane which enables industrially advantageous production of a polyrotaxane with a high inclusion rate. The present invention relates to a method for producing a polyrotaxane that includes a cyclodextrin; a compound having a repeating structural unit represented by the following formula (1), and threading through a cavity of the cyclodextrin in a skewered manner to be included in the cyclodextrin; and capping groups individually placed at each end of a molecule of the compound having a repeating structural unit represented by the formula (1) to prevent the cyclodextrin from separating, the method comprising: a step 1 of mixing the compound having a repeating structural unit represented by the formula (1) and the cyclodextrin in an aqueous medium to prepare an aqueous dispersion of pseudopolyrotaxan particles in which the compound having a repeating structural unit represented by the formula (1) is included in a cavity of a cyclodextrin molecule in a skewered manner; and a step 2 of mixing a triazine compound represented by the formula (2), a compound having at least one tertiary amino group, the aqueous dispersion of pseudopolyrotaxane particles prepared in the step 1, and a capping agent to introduce capping groups individually at each end of a molecule of the compound having a repeating structural unit represented by the formula (1) in the pseudopolyrotaxane particles,
wherein, in the formula (2), R 1 and R 2 are each independently a C1-C4 alkyl group or a C6-C8 aryl group, and X represents a halogen atom.
Abstract:
The present invention aims to provide an industrially advantageous method of producing a powdery pseudopolyrotaxane with a high inclusion ratio. The present invention relates to a method for producing a pseudopolyrotaxane, including: an inclusion step of mixing a polyethylene glycol and a cyclodextrin in an aqueous medium to form an aqueous dispersion of pseudopolyrotaxane that contains pseudopolyrotaxane particles in which the polyethylene glycol is included in the cavities of the cyclodextrin molecules in a skewered manner; and a drying step of drying the aqueous dispersion of pseudopolyrotaxane produced in the inclusion step to obtain the pseudopolyrotaxane. In the drying step, the aqueous dispersion of pseudopolyrotaxane is sprayed and dried in a heated gas-stream.