Abstract: Provided is a polymer composite material which has a high proton spin polarization even though it is a polymer composite material containing carbon black. The present invention relates to a polymer composite material for 1H dynamic nuclear polarization experiments, containing carbon black, having a thickness of 0.8 mm or less, and being doped with a paramagnetic radical compound.

Abstract: A method for evaluating the crosslink concentration in a crosslinked rubber is provided. The present invention relates to a method for evaluating the crosslink concentration in a crosslinked rubber by small-angle X-ray scattering or small-angle neutron scattering using measurement samples prepared by swelling the crosslinked rubber to different degrees of swelling.

Abstract: A pneumatic tire includes an inner liner disposed on an inner side of the tire. The inner liner is composed of a polymer sheet made of an elastomer composition containing a SIBS modified copolymer obtained by modifying a styrene block portion of a styrene-isobutylene-styrene triblock copolymer with acid anhydride. In the inner liner, a ratio (Gs/Gb) between an average thickness Gb in a bead region Rb extending from a tire largest width position to a bead toe and an average thickness Gs in a buttress region Rs extending from the tire largest width position to a corresponding position Lu at a belt layer end is 0.30 to 0.75.

Abstract: A pneumatic tire includes an inner liner disposed on an inner side of the tire. The inner liner is composed of a polymer sheet made of an elastomer composition containing a SIBS modified copolymer obtained by modifying a styrene block portion of a styrene-isobutylene-styrene triblock copolymer with acid chloride having an unsaturated bond. In the inner liner, a ratio (Gs/Gb) between an average thickness Gb in a bead region Rb extending from a tire largest width position to a bead toe and an average thickness Gs in a buttress region Rs extending from the tire largest width position to a corresponding position Lu at a belt layer end is 0.30 to 0.75.

Abstract: A pneumatic tire has a carcass layer extending from a tread portion to bead portions on both sides thereof, a belt layer on an outer side of a crown portion thereof, and an inner liner disposed on an inner side of the carcass layer. The inner liner is composed of a first layer disposed on an inner side of the tire, and a second layer disposed in contact with a rubber layer of said carcass layer. The first layer is an elastomer composition containing a thermoplastic elastomer, an ultraviolet absorber and an antioxidant, the thermoplastic elastomer containing at least one of a styrene-isobutylene-styrene block copolymer and a SIBS modified copolymer obtained by modifying a styrene block portion of a styrene-isobutylene-styrene block copolymer with one of acid chloride and acid anhydride having an unsaturated bond. The second layer contains an elastomer containing at least one of a styrene-isoprene-styrene block copolymer and a styrene-isobutylene block copolymer.

Abstract: Provided is a polymer composite material which has a high proton spin polarization even though it is a polymer composite material containing carbon black. The present invention relates to a polymer composite material for 1H dynamic nuclear polarization experiments, containing carbon black, having a thickness of 0.8 mm or less, and being doped with a paramagnetic radical compound.

Abstract: The present invention is a pneumatic tire comprising an inner liner disposed on the inner side of the tire. The inner liner is composed of a sheet made of an elastomer composition containing a styrene-isobutylene-styrene triblock copolymer by more than or equal to 7 percent by mass and less than or equal to 93 percent by mass and an isobutylene-based modified copolymer containing a ?-pinene component by more than or equal to 7 percent by mass and less than or equal to 93 percent by mass. In the inner liner, a ratio Gs/Gb between an average thickness Gb in a bead region Rb extending from a tire largest width position to a bead toe and an average thickness Gs in a buttress region Rs extending from the tire largest width position to a corresponding position Lu at a belt layer end is 0.30 to 0.75.

Abstract: The inner liner is composed of a polymer layer stack including a first layer containing an SIBS and a second layer containing at least one of an SIS and an SIB. At least one of the first layer and the second layer is a polymer composition containing one of a C4 polymer obtained by polymerizing a monomer unit having 4 carbon atoms, a layered clay mineral with an organic compound intercalated therein and at least one kind of rubber component selected from the group consisting of a natural rubber, an isoprene rubber and a butyl rubber. The second layer is arranged to come into contact with a rubber layer of the carcass ply. The inner liner has a thickness Ge at a shoulder position Pe exceeding 100% and being less than or equal to 500% of a thickness Gc at a crown central position Pc.

Abstract: Provided is a pneumatic tire having improved air permeability resistance by improving adhesive property between an inner liner and a tire component adjacent thereto, reduced rolling resistance, and improved low temperature durability. The inner liner is composed of a polymer layer stack including a first layer containing an SIBS and a second layer containing at least one of an SIS and an SIB. At least one of the first layer and the second layer is a polymer composition containing one of a C4 polymer obtained by polymerizing a monomer unit having 4 carbon atoms, a layered clay mineral with an organic compound intercalated therein and at least one kind of rubber component selected from the group consisting of a natural rubber, an isoprene rubber and a butyl rubber. The second layer is arranged to come into contact with a rubber layer of the carcass ply.

Abstract: A method for evaluating the crosslink concentration in a crosslinked rubber is provided. The present invention relates to a method for evaluating the crosslink concentration in a crosslinked rubber by small-angle X-ray scattering or small-angle neutron scattering using measurement samples prepared by swelling the crosslinked rubber to different degrees of swelling.

Abstract: The present invention provides a method for evaluating energy loss in a polymeric material, wherein the method provides sufficient evaluation of the difference in performance between samples with excellent measurement accuracy; a method for evaluating chipping resistance of a polymeric material, wherein the method provides evaluation in a short period of time and at low cost with excellent measurement accuracy; and a method for evaluating abrasion resistance of a polymeric material, wherein the method provides sufficient evaluation of the difference in performance between samples with excellent measurement accuracy. The present invention relates to methods for evaluating energy loss, chipping resistance, and abrasion resistance of a polymeric material, and the methods include irradiating the polymeric material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.

Abstract: A pneumatic tire including an inner liner including a first layer including a first polymer composition having a polymer component containing 5% to 70% by mass of an SIBS and 30% to 95% by mass of a rubber component, and a second layer including a second polymer composition having a polymer component containing 10% to 85% by mass of at least any of an SIS and an SIB and 10% to 90% by mass of a rubber component, the first layer being placed inwardly in a tire radius direction, and the inner liner having an average thickness Gs in a buttress region Rs that is thinner than an average thickness Gb in a bead region Rb.

Abstract: A pneumatic tire includes an inner liner and a carcass ply provided adjacent to the inner liner and having a cord embedded in a rubber layer. The inner liner is composed of a polymer layer stack including a first layer of a polymer composition containing SIBS and a rubber component having a thickness of 0.05 mm to 0.6 mm, and a second layer of a polymer composition containing at least either one of SIS and SIB as well as a rubber component having a thickness of 0.01 mm to 0.3 mm. The second layer is arranged so as to be in contact with the rubber layer of the carcass ply. A distance L from a plane passing through the center of cross section of the cord to the second layer is more than or equal to 0 and less than or equal to (1+D/2) mm where D denotes the diameter of the cord.

Abstract: The present invention is a pneumatic tire comprising an inner liner disposed on the inner side of the tire. The inner liner is composed of a sheet made of an elastomer composition containing a styrene-isobutylene-styrene triblock copolymer by more than or equal to 7 percent by mass and less than or equal to 93 percent by mass and an isobutylene-based modified copolymer containing a ?-pinene component by more than or equal to 7 percent by mass and less than or equal to 93 percent by mass. In the inner liner, a ratio Gs/Gb between an average thickness Gb in a bead region Rb extending from a tire largest width position to a bead toe and an average thickness Gs in a buttress region Rs extending from the tire largest width position to a corresponding position Lu at a belt layer end is 0.30 to 0.75.

Abstract: The present invention provides a method for evaluating energy loss in a polymeric material, wherein the method provides sufficient evaluation of the difference in performance between samples with excellent measurement accuracy; a method for evaluating chipping resistance of a polymeric material, wherein the method provides evaluation in a short period of time and at low cost with excellent measurement accuracy; and a method for evaluating abrasion resistance of a polymeric material, wherein the method provides sufficient evaluation of the difference in performance between samples with excellent measurement accuracy. The present invention relates to methods for evaluating energy loss, chipping resistance, and abrasion resistance of a polymeric material, and the methods include irradiating the polymeric material with X-rays or neutrons to perform X-ray scattering measurement or neutron scattering measurement.

Abstract: The inner liner is composed of a polymer layer stack including a first layer containing an SIBS and a second layer containing at least one of an SIS and an SIB. At least one of the first layer and the second layer is a polymer composition containing one of a C4 polymer obtained by polymerizing a monomer unit having 4 carbon atoms, a layered clay mineral with an organic compound intercalated therein and at least one kind of rubber component selected from the group consisting of a natural rubber, an isoprene rubber and a butyl rubber. The second layer is arranged to come into contact with a rubber layer of the carcass ply. The inner liner has a thickness Ge at a shoulder position Pe exceeding 100% and being less than or equal to 500% of a thickness Gc at a crown central position Pc.