A monomer is represented by Chemical Formula 1:

##STR00001## wherein in Chemical Formula 1, X.sup.1 and X.sup.2 are independently O, C(O), or C(O)O, R.sup.1 to R.sup.10 are independently hydrogen, a substituted or unsubstituted C1 to C20 alkyl group, a substituted or unsubstituted C1 to C20 alkoxy group, a substituted or unsubstituted C3 to C20 cycloalkyl group, a substituted or unsubstituted C6 to C20 aryl group, a substituted or unsubstituted C3 to C20 heterocyclic group, a substituted or unsubstituted silyl group, a hydroxy group, a halogen, a nitro group, or a combination thereof, and n1 and n2 are independently an integer ranging from 0 to 3.

The present invention relates to a hydrochromic polydiacetylene composite composition, a hydrochromic thin film using same, and a use thereof, and more specifically, to a hydrochromic polydiacetylene composite composition reacting sensitively to moisture, providing the hydrochromic thin film using same, and to applying same to biorecognition or fingerprint recognition. According to the present invention, moisture secreted from a fingerprint or pores on the skin can be detected with high sensitivity. Thus, the position of pores unique to a fingerprint of an organism can be amplified and displayed through selective color change and fluorescent change patterns exhibited when moisture is absorbed.

A solventless resin composition with a low dielectric constant and a substrate structure are provided. The composition includes: (a) 20-50 parts by weight of a copolymer having the structure of Formula (I)

##STR00001## wherein, i, j, k, l, and m are independently an integer from 1 to 10; (b) 50-80 parts by weight of a compound having the structure of Formula (II)

##STR00002##

(c) 80-100 parts by weight of a hardener; and (d) 70-100 parts by weight of an inorganic filler.

A solventless resin composition with a low dielectric constant and a substrate structure are provided. The composition includes: (a) 20-50 parts by weight of a copolymer having the structure of Formula (I)

##STR00001## wherein, i, j, k, l, and m are independently an integer from 1 to 10; (b) 50-80 parts by weight of a compound having the structure of Formula (II)

##STR00002##

(c) 80-100 parts by weight of a hardener; and (d) 70-100 parts by weight of an inorganic filler.

Some implementations provide a composite material that includes a first material and a second material. In some implementations, the composite material is a metamaterial. The first material includes a chiral polymer (e.g., crystalline chiral helical polymer, poly--benzyl-L-glutamate (PBLG), poly-L-lactic acid (PLA), polypeptide, and/or polyacetylene). The second material is within the chiral polymer. The first material and the second material are configured to provide an effective index of refraction value for the composite material of 1 or less. In some implementations, the effective index of refraction value for the composite material is negative. In some implementations, the effective index of refraction value for the composite material of 1 or less is at least in a wavelength of one of at least a visible spectrum, an infrared spectrum, a microwave spectrum, and/or an ultraviolet spectrum.

Some implementations provide a composite material that includes a first material and a second material. In some implementations, the composite material is a metamaterial. The first material includes a chiral polymer (e.g., crystalline chiral helical polymer, poly--benzyl-L-glutamate (PBLG), poly-L-lactic acid (PLA), polypeptide, and/or polyacetylene). The second material is within the chiral polymer. The first material and the second material are configured to provide an effective index of refraction value for the composite material of 1 or less. In some implementations, the effective index of refraction value for the composite material is negative. In some implementations, the effective index of refraction value for the composite material of 1 or less is at least in a wavelength of one of at least a visible spectrum, an infrared spectrum, a microwave spectrum, and/or an ultraviolet spectrum.

A tackifier is used resin in an energic material formulation comprising active materials and a polymeric binder to reduce or eliminate the use of a plasticiser in the formulation wherein the tackifier resin is compatible with the polymeric material.

A tackifier is used resin in an energic material formulation comprising active materials and a polymeric binder to reduce or eliminate the use of a plasticiser in the formulation wherein the tackifier resin is compatible with the polymeric material.

Large tires, the tread of which has a mean volumetric void ratio over the entire tread of greater than 10%, comprise a composition based on at least one diene elastomer, on a vulcanization system and from 0.10 to 1 phr of at least one organic polysulfide.

Large tires, the tread of which has a mean volumetric void ratio over the entire tread of greater than 10%, comprise a composition based on at least one diene elastomer, on a vulcanization system and from 0.10 to 1 phr of at least one organic polysulfide.