Vinyl Chloride Repeat Units

In this case the repeat unit has the same atoms as the monomer vinyl chloride ch 2 chcl.

Vinyl chloride repeat units.

The chemical structure of the vinyl chloride repeating units is. Pvc was first prepared by the german chemist august wilhelm von hofmann in 1872 but it was not patented until 1912 when another german chemist friedrich heinrich august klatte used sunlight to initiate the polymerization of vinyl chloride. Crystalline density at 25 o c. One of the simplest repeat units is that of the addition polymer polyvinyl chloride ch 2 chcl n whose repeat unit is ch 2 chcl.

The repeating units take on the linear homopolymer arrangement illustrated in. About 13 billion kilograms are produced annually. When the polymer is formed the c c double bond in the monomer is replaced by a c c single bond in the polymer repeat. If one of the repeat units is styrene which of ethylene propylene tetrafluoroethylene and vinyl chloride is the other repeat unit.

Amorphous density at 25 o c. An alternating copolymer is known to have a number average molecular weight of 100000 g mol and a degree of polymerization of 2210. Vinyl chloride is an organochloride with the formula h 2 c chcl that is also called vinyl chloride monomer vcm or chloroethene this colorless compound is an important industrial chemical chiefly used to produce the polymer polyvinyl chloride pvc. Vinyl chloride ch 2 chcl is most often obtained by reacting ethylene with oxygen and hydrogen chloride over a copper catalyst.

Most of the vinyl chloride produced in the united states is used to make a polymer called polyvinyl chloride pvc which consists of long repeating units of vinyl chloride. Production of vinyl chloride in the united states grew at an average rate of about 7 from the early 1980s to the early 1990s with current growth at about 3 annually. It is a carcinogenic gas that must be handled with special protective procedures. As a polymer repeating unit its chemical structure is.

Solution for an alternating copolymer which has a number average molecular weight of 250 000 g mol and a degree of polymerization of 3500 we are to determine one of the repeat unit types if the other is.