Dicyclopentadiene is co-produced with ethylene from the C5 fraction in the steam
cracking of naphtha and gas oils. The largest consumption of dicyclopentadiene
is linked to the production of resins including unsaturated polyester resins,
petroleum resins, terpolymers, polynorbornenes, and other cyclic olefin
polymers. It is used to manufacture pesticides, paints, varnishes, metal
derivative, epoxy resin, adamantane, glutaraldehyde, perfumery, flame
retardants, medicine, other chemicals.
Terpolymer is a polymer that contains
three distinct monomers; ethylene, propylene, acrylonitrile, butadiene, styrene
and dicyclopentadiene. ABS is the terpolymer of acrylonitrile-butadiene-styrene.
EPDM (ethylene-propylene diene rubber) is the elastomer which is composed of
ethylene, propylene and a nonconjugated diene which can be vulcanized.
Norbornene is a bridged cyclic olefin. consists of a bridged cyclohexene with a
solid bond on one side. It is prepared by the Diels-Alder reaction of two diene
hydrocarbons, cyclopentadiene and ethylene. Norbornadiene which has the same
carbon skeleton but with two solid bonds is produced from cyclopentadiene and
an alkyne. Norbornane is a bridged cyclic hydrocarbon, saturated without solid
bonds. Norbornenes are important monomers in ring-opening metathesis
polymerizations (ROMP), radical and cationic polymerization, and addition
polymerization. Polynorbornenes are polymers with high glass transition
temperatures and high optical clarity. They also used in general organic
synthesis for the target molecules including pharmaceutical intermediates,
pesticide compounds, fragrances and high energy fuels. Endo, exo isomers are
found in boat-shaped norbornyl systems. Endo is the prefix for the conformation
of carbon bonds in a six-membered ring with one or more substituents directed
inward from the ring (substituents positions are closest to the longest bridge).
Exo is the isomer with the substituent of outward-directed valence bonds
(shortest position the longest bridge).
max (Pt/Co Sale)
DESCRIPTION OF ORGANIC ELECTROLUMINESCENCE MATERIALS
Due to extended pi-electron cloud overlaps, organometallic molecules or aromatic
oligometers such as anthracene exhibit semiconductor properties. Conductive
polymers have extended delocalized bonds that creates electrical conductivity
when charge carriers generated make positive charges (holes) and negative
charges (electrons) move to opposite electrodes. Doping is the intentional
impurities in a pure semiconductor to generate charge carriers. The
transportation of charges is responsible for fluorescence and electrical energy.
These can form well-ordered thin crystalline films. Organic semiconductors have
some merits of self radiation, flexibility, light weight, easy fabrication, and
low cost. Organic electroluminescence materials have lead to the rapid development of
photovoltaic and display devices such as organic solar cells,
biosensitizers, OLED(Organic Light Emiting Diode),
OTFT(Organic Thin Film Transistor), Wearable Display, and e-Paper. Some examples of organic electroluminescence materials