The present disclosure provides copolymers comprising from about 0.5 wt % to about 25 wt % cyclic olefin content and films comprising the copolymers. In one embodiment, a copolymer includes a C.sub.2-C.sub.40 monomer content of from about 75 wt % to about 99.5 wt %; and a C.sub.5-C.sub.40 cyclic olefin comonomer content of from about 0.5 wt % to about 25 wt %. The copolymer has a density of about 0.91 g/cm.sup.3 to about 0.933 g/cm.sup.3. Films of the present disclosure can have advantageous mechanical properties (such as melt strength) and optical properties (such as haze %).

Provided is a cyclic olefin-based resin composition including a cyclic olefin-based polymer (A), and a hindered amine compound (Y) that contains a piperidyl group represented by General Formula (1) and a carboxylic acid amide group represented by General Formula (2) within the same molecule.

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Provided is a cyclic olefin-based resin composition including a cyclic olefin-based polymer (A), and a hindered amine compound (Y) that contains a piperidyl group represented by General Formula (1) and a carboxylic acid amide group represented by General Formula (2) within the same molecule.

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Cyclic olefin copolymer (COC) is useful as a build material for 3D printing, especially desktop 3D printing. Low haze and high transmission versions are a function of specific grades of styrenic block copolymer (SBC) used for impact modification.

Cyclic olefin copolymer (COC) is useful as a build material for 3D printing, especially desktop 3D printing. Low haze and high transmission versions are a function of specific grades of styrenic block copolymer (SBC) used for impact modification.

There is provided an optical element comprising a base material comprising a resin material and a stack covering of layers disposed on the base material. In the optical element of the present disclosure, the stack covering comprises an optical multi-layered part composed of a high refractive index layer comprising Ta.sub.2O.sub.5 and a low refractive index layer comprising SiO.sub.2, the high refractive index layer and the low refractive index layer being alternately stacked in a form of 4 or more layers. Of a plurality of high refractive index layers, a first high refractive index layer situated most closely to the base material has a fissured structure.

There is provided an optical element comprising a base material comprising a resin material and a stack covering of layers disposed on the base material. In the optical element of the present disclosure, the stack covering comprises an optical multi-layered part composed of a high refractive index layer comprising Ta.sub.2O.sub.5 and a low refractive index layer comprising SiO.sub.2, the high refractive index layer and the low refractive index layer being alternately stacked in a form of 4 or more layers. Of a plurality of high refractive index layers, a first high refractive index layer situated most closely to the base material has a fissured structure.

Ion exchange membranes for use in electrochemical energy conversion and storage applications include copolymers having a backbone produced from an olefin, such as ethylene, and a cyclic olefin, such as norbornene. Haloalkyl side chains with terminal halide groups are connected to the polymer backbone via Friedel-Crafts alkylation. The halide groups are then replaced with ionic groups via substitution. The ion exchange membrane material can then be cast or impregnated into a reinforcing mesh to form cation exchange membrane or anion exchange membranes. Rigidity of the ion exchange membranes can be controlled by varying the ratio of olefin to cyclic olefin in the polymer backbone.

There are provided a thermoplastic resin composition capable of bonding a cyclic polyolefin-based polymer and an ethylene-vinyl alcohol copolymer with sufficient strength and to provide a laminate using the same.

There are provided a thermoplastic resin composition capable of bonding a cyclic polyolefin-based polymer and an ethylene-vinyl alcohol copolymer with sufficient strength and to provide a laminate using the same.