A statistical, cationic-functionalized norbornene copolymer is formed by a process including performing a vinyl addition polymerization in the presence of a metal catalyst of a first norbornene monomer substituted with a first alkyl group and at least a second norbornene monomer substituted with a second alkyl group, to form an intermediate norbornene copolymer. The second alkyl group includes a substituent which undergoes a substitution reaction with a precursor of a cationic group. The process further includes adding the precursor for the cationic group to the intermediate norbornene copolymer to form the cationic functionalized norbornene copolymer. The cationic group has a volume of 0.25 cm.sup.3/mol or greater (for example, a phosphonium group or an imidazolium group).

A statistical, cationic-functionalized norbornene copolymer is formed by a process including performing a vinyl addition polymerization in the presence of a metal catalyst of a first norbornene monomer substituted with a first alkyl group and at least a second norbornene monomer substituted with a second alkyl group, to form an intermediate norbornene copolymer. The second alkyl group includes a substituent which undergoes a substitution reaction with a precursor of a cationic group. The process further includes adding the precursor for the cationic group to the intermediate norbornene copolymer to form the cationic functionalized norbornene copolymer. The cationic group has a volume of 0.25 cm.sup.3/mol or greater (for example, a phosphonium group or an imidazolium group).

A curable composition comprises at least 10 wt % expanding monomers based on a total weight of the curable composition, at least 25 wt % acrylate monomers based on the total weight of the curable composition, a photoinitiator, and a photosensitizer. The acrylate monomers have a molecular weight of 500 or less. The curable composition has a viscosity of 10 cP or less. A total amount of the expanding monomers and the acrylate monomers are at least 90 wt % based on the total weight of the curable composition.

A curable composition comprises at least 10 wt % expanding monomers based on a total weight of the curable composition, at least 25 wt % acrylate monomers based on the total weight of the curable composition, a photoinitiator, and a photosensitizer. The acrylate monomers have a molecular weight of 500 or less. The curable composition has a viscosity of 10 cP or less. A total amount of the expanding monomers and the acrylate monomers are at least 90 wt % based on the total weight of the curable composition.

Described is a cyclic olefin-based copolymer has a constitutional unit (A) derived from an α-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring. Also described is a medical container containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an α-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring.

Described is a cyclic olefin-based copolymer has a constitutional unit (A) derived from an α-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring. Also described is a medical container containing a cyclic olefin-based copolymer having a constitutional unit (A) derived from an α-olefin having 2 to 20 carbon atoms, a constitutional unit (B) derived from a cyclic olefin without an aromatic ring, and a constitutional unit (C) derived from a cyclic olefin having an aromatic ring.

A resin composition is provided. The resin composition comprises: (A) a compound having a structure of formula (I), ##STR00001## wherein R.sub.1 is an organic group; and (B) a vinyl-containing elastomer, wherein the weight ratio of the compound having the structure of formula (I) to the vinyl-containing elastomer is 20:1 to 1:1.

A resin composition is provided. The resin composition comprises: (A) a compound having a structure of formula (I), ##STR00001## wherein R.sub.1 is an organic group; and (B) a vinyl-containing elastomer, wherein the weight ratio of the compound having the structure of formula (I) to the vinyl-containing elastomer is 20:1 to 1:1.

Oxacycloolefinic polymers as typically obtained by metathesis polymerization using Ru-catalysts, show good solubility and are well suitable as dielectric material in electronic devices such as capacitors and organic field effect transistors.

Oxacycloolefinic polymers as typically obtained by metathesis polymerization using Ru-catalysts, show good solubility and are well suitable as dielectric material in electronic devices such as capacitors and organic field effect transistors.