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Cyclic olefin copolymer (COC) is an amorphous polymer made by several polymer manufacturers. COC is a relatively new class of polymers as compared to commodities such as polypropylene and polyethylene. This newer material is used in a wide variety of applications including packaging films, lenses, vials, displays, and medical devices.
An alternative process involving copolymerization with ethylene is used to make cyclic olefin copolymers (COC). These two types of cyclic olefin polymers were historically referred to as COC but are now recognized as distinct classes of polymers formed from different polymerization processes.
Copolymers of ethyl and vinyl acetate can be synthesized via this process. [6] First, a cycloctene functionalized with an ester functionality at the position 5 carbon reacts with a ruthenium complex. Next, the resulting open-ringed product is treated with hydrazine to hydrogenate the double bond resulting in ethane and vinyl acetate copolymer.
block copolymer: A copolymer that is a block polymer. In the constituent macromolecules of a block copolymer, adjacent blocks are constitutionally different, ...
Corcoran station, an Amtrak station in California, United States whose station code is COC; Cup of China, a figure skater competition; Cyclic olefin copolymer, the chemical name for a plastic engineering resin; Continuum of Care, a program designed to promote community-wide commitment to the goal of ending homelessness
The following is a list of Scottish clans (with and without chiefs) – including, when known, their heraldic crest badges, tartans, mottoes, and other information. The crest badges used by members of Scottish clans are based upon armorial bearings recorded by the Lord Lyon King of Arms in the Public Register of All Arms and Bearings in Scotland .
Structure of cadmium cyanide (Cd(CN) 2), highlighting the interpenetrated structure.Blue = one Cd(CN) 2 substructure, red = other Cd(CN) 2 substructure. An Interpenetrating polymer network (IPN) is a polymer comprising two or more networks which are at least partially interlaced on a polymer scale but not covalently bonded to each other.
Figure 1: Example of a (a) diblock copolymer, (b) gradient copolymer and (c) random copolymer. In polymer chemistry, gradient copolymers are copolymers in which the change in monomer composition is gradual from predominantly one species to predominantly the other, [1] unlike with block copolymers, which have an abrupt change in composition, [2] [3] and random copolymers, which have no ...