9 represented the other methyl carbons of the cis isoprene unit
of the chain.
The bromine atom, in most cases, is attached to one of the allylie carbon atoms in the isoprene unit
The FTIR method has been developed to measure the isoprene unit
in butyl and halobutyl rubber.
In case of GR composites, GR layers are well exfoliated through ENR matrix and the particle size is smaller compared to GT filled composites, It is because of the good compatibility between oxygen functionalities on the surface of GR and epoxy groups of isoprene units
owing to the formation of hydrogen bonds, the exfoliated GR layers were indicated through arrow marks in TEM micrographs.
Terpenes structures are consisting of isoprene units
(C5), which may contain oxygen.
In humans, dolichol-19, containing 19 isoprene units
, is the most abundant species.
Now it became clear that the secret of synthetic rubber lay in joining together isoprene units
into long chains.
Coenzyme Q10 is liposoluble and has 10 isoprene units
Their chemical structure consists of repeated isoprene (C5H8) units and is classified according to the number of isoprene units
: Monoterpenes have two isoprene units
(C10), sesquiterpenes have three (C15), and diterpenes have four (C20).
The ubiquinone found in humans, ubidecaquinone, has 10 isoprene units
(a total of 50 carbons), ergo, the "10" in CoQ10.
Natural rubber is a polyisoprene produced by Hevea trees and consists of approximately 99% cis-l,4 repeating isoprene units
The co-terminal entails two trans-l,4 isoprene units