Important synthetic rubbers: polyethylene, Chemistry

Assignment Help:

Polyethylene: Polyethylene are formed by polymerization of ethylene under high pressure and at moderately high temperature. The resulting polymers are then subjected to substitution and other reactions to yield the required plastic. Polyethylene's have good chemical resistance electrical resistance low water absorption and good flexibility. These are much cheaper than other plastics. However high temperature and sunlight affects the properties of polyethylene's adversely e.g. resistance to chemicals falls drastically at higher temperature.

USES:

(1)                         Used in manufacture of toys and other house hold articles.

(2)                         Used for the manufacturer of domestic pipes and gas pippins.

PROPERTIES:

(1)                         Due to strong inter: chain forces tensile strength is quite high.

(2)                          It can be vulcanized to a little extent to form cross linked structures with improved mechanical properties due to the little presence of double bonds. Thus this rubber cannot be hardened due to small number of cross linkages.

(3)                         It is highly resistant to atmosphere heat abrasion acids oils alkalis oxygen and ozone.

USES:

(1)                         Used as an insulation material in the electrical industry and in rubber based industries like inner tubes for the tyres of bicycles rickshaws and automobiles.

(2)                         Used as a solid fuel for rockets.


Related Discussions:- Important synthetic rubbers: polyethylene

The uncertainty principle and the concept of wave nature, The uncertainty p...

The uncertainty principle and the concept of wave nature of matter was proposed by ...... and ...... respectively: (1)  Heisenberg, de Broglie (2) de-Broglie, Heisenberg

Mole fraction, The mole fraction of solute and solvent is equal to

The mole fraction of solute and solvent is equal to

Solutions, what is meant by abnormal molecular mass ?

what is meant by abnormal molecular mass ?

Dehydration., the complete equation for forming a peptide bond through dehy...

the complete equation for forming a peptide bond through dehydration

Fractional distillation - purification of organic compounds, Fractional dis...

Fractional distillation - Purification of organic compounds This method is used to separate a mixture of two or more miscible liquids that have boiling points close to each oth

Organic chemistry , factors affecting the acidity of the aromatic carboxil...

factors affecting the acidity of the aromatic carboxilic acids

Two dimensional potential , A particle is in the two dimensional potential ...

A particle is in the two dimensional potential well (V(x,y) =  ∞ for the outside of the well, V(x,y) = 0 for the inside of the well. (a)  Starting with the shrodinger equation,

Determine the equilibrium concentrations of tris buffer, A Tris buffer at p...

A Tris buffer at pH 6.0 (here "Tris" is a nickname use for Tris hydroxymethyl amino methane). For the given pK A table is Tris a compound you would select for a buffer at pH 6.0?

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd