Manufacture and uses of synthetic polymers
Manufacture of rubber
Natural rubber is a polymer of 2-methyl-1,3-butadiene (isopren
On average, a molecule of rubber contains 5000 isoprene units.
All the double bonds in natural rubber are cis.
Rubber is a waterproof material because it consists of a ta
hydrocarbon chains that have no affinity for water.
Charles Macintosh, a Scotsman, was the first to use rubbe
waterproof coating for raincoats.
, Gutta-percha (from the Malaysian words getah, meaning “gum,” and
meaning “tree”)
Naturally occurring isomer of rubber in which all the double bonds are
Like rubber, gutta-percha is exuded by certain trees.
It is also harder and more brittle than rubber.
Gutta-percha is the filling material that dentists use in root canals
material used for the casing of golf balls.
, Scientists have learned to make synthetic rubbers with pro
tailored to meet human needs
The synthetic rubber have some properties of natural
including waterproof and elastic
They have some improved properties like they are toughe
flexible and more durable than natural rubber
Synthetic rubbers have been made by polymerizing diene
than isoprene
One synthetic rubber is a polymer of 1,3-butadiene in which
double bonds are cis
It is carried out in the presence of a Ziegler-Natta catalyst so t
configuration of the double bonds in the polymer can be contr
Manufacture of rubber
Natural rubber is a polymer of 2-methyl-1,3-butadiene (isopren
On average, a molecule of rubber contains 5000 isoprene units.
All the double bonds in natural rubber are cis.
Rubber is a waterproof material because it consists of a ta
hydrocarbon chains that have no affinity for water.
Charles Macintosh, a Scotsman, was the first to use rubbe
waterproof coating for raincoats.
, Gutta-percha (from the Malaysian words getah, meaning “gum,” and
meaning “tree”)
Naturally occurring isomer of rubber in which all the double bonds are
Like rubber, gutta-percha is exuded by certain trees.
It is also harder and more brittle than rubber.
Gutta-percha is the filling material that dentists use in root canals
material used for the casing of golf balls.
, Scientists have learned to make synthetic rubbers with pro
tailored to meet human needs
The synthetic rubber have some properties of natural
including waterproof and elastic
They have some improved properties like they are toughe
flexible and more durable than natural rubber
Synthetic rubbers have been made by polymerizing diene
than isoprene
One synthetic rubber is a polymer of 1,3-butadiene in which
double bonds are cis
It is carried out in the presence of a Ziegler-Natta catalyst so t
configuration of the double bonds in the polymer can be contr
