Carbon fiber composite material and process for producing the same
First Claim
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1. A carbon fiber composite material comprising an elastomer and a plurality of carbon nanofibers substantially uniformly dispersed in the elastomer, wherein:
- the elastomer has an unsaturated bond or a group bonding with an active part of each carbon nanofibers;
the elastomer in the composite material is in its uncrosslinked form; and
the composite material has a first spin-spin relaxation time (T2n) of 100 to 3,000 μ
sec and a second spin-spin relaxation time (T2nn) of being absent or 1,000 to 10,000 μ
sec, and a fraction (fnn) of components having the second spin-spin relaxation time of less than 0.2, as measured under conditions of an observing nucleus of 1H at 150°
C. by the Hahn-echo method using pulsed NMR technique.
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Abstract
The present invention provides a carbon fiber composite material comprising an elastomer and a carbon nanofiber dispersed in the elastomer, wherein the elastomer has an unsaturated bond or a group, having affinity to the carbon nanofiber. Also disclosed is a process for producing the carbon fiber composite material.
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Citations
14 Claims
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1. A carbon fiber composite material comprising an elastomer and a plurality of carbon nanofibers substantially uniformly dispersed in the elastomer, wherein:
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the elastomer has an unsaturated bond or a group bonding with an active part of each carbon nanofibers; the elastomer in the composite material is in its uncrosslinked form; and the composite material has a first spin-spin relaxation time (T2n) of 100 to 3,000 μ
sec and a second spin-spin relaxation time (T2nn) of being absent or 1,000 to 10,000 μ
sec, and a fraction (fnn) of components having the second spin-spin relaxation time of less than 0.2, as measured under conditions of an observing nucleus of 1H at 150°
C. by the Hahn-echo method using pulsed NMR technique. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A carbon fiber composite material comprising an elastomer and a plurality of carbon nanofibers substantially uniformly dispersed in the elastomer, wherein:
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the elastomer has an unsaturated bond or a group bonding with a terminal radical of each carbon nanofibers; the elastomer in the composite material is in its uncrosslinked form; and the composite material has a first spin-spin relaxation time (T2n) of 100 to 3,000 μ
sec and a second spin-spin relaxation time (T2nn) of being absent or 1,000 to 10,000 μ
sec, and a fraction (fnn) of components having the second spin-spin relaxation time of less than 0.2, as measured under conditions of an observing nucleus of 1H at 150°
C. by the Hahn-echo method using pulsed NMR technique. - View Dependent Claims (8, 9, 10, 11, 12)
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13. A carbon fiber composite material comprising an elastomer and a plurality of carbon nanofibers substantially uniformly dispersed in the elastomer, wherein:
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the elastomer has an unsaturated bond or a group bonding with an active part of each carbon nanofibers; the elastomer in the composite material is in its crosslinked form; and the composite material has a first spin-spin relaxation time (T2n) of its of 100 to 2,000 μ
sec and a second spin-spin relaxation time (T2nn) of being absent or 1,000 to 10,000 μ
sec, and a fraction (fnn) of components having the second spin-spin relaxation time of less than 0.2, as measured under conditions of an observing nucleus of 1H at 150°
C. by the Hahn-echo method using pulsed NMR technique.
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14. A carbon fiber composite material comprising an elastomer and a plurality of carbon nanofibers substantially uniformly dispersed in the elastomer, wherein:
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the elastomer has an unsaturated bond or a group bonding with a terminal radical of each carbon nanofibers; the elastomer in the composite material is in its crosslinked form; and the composite material has a first spin-spin relaxation time (T2n) of its of 100 to 2,000 μ
sec and a second spin-spin relaxation time (T2nn) of being absent or 1,000 to 10,000 μ
sec, and a fraction (fnn) of components having the second spin-spin relaxation time of less than 0.2, as measured under conditions of an observing nucleus of 1H at 150°
C. by the Hahn-echo method using pulsed NMR technique.
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Specification