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

Rubber, Account for the soft nature of rubber material

Account for the soft nature of rubber material

Physical and derived quantities, 1. Discuss how such discoveries, technolog...

1. Discuss how such discoveries, technological advancement and breakthroughs were achieved and the person behind this advancement, it can be local or international. 2. List the ma

P blok, Diagonal relationship between Be and Al

Diagonal relationship between Be and Al

MOHRS SALT, write the prepation of mohrs salt..

write the prepation of mohrs salt..

Illustrate the descriptive analysis of sensory method, Q. Illustrate the de...

Q. Illustrate the descriptive analysis of Sensory method? Sensory methods may be used to quantify the perceived intensities of the sensory attributes of a product. The quantif

Stoichiometry.., wht is the difference between molar mass & molecular mass?...

wht is the difference between molar mass & molecular mass?

Physical properties of trihydric alcohols, Physical properties of Trihydric...

Physical properties of Trihydric alcohols (a) Trihydric alcohol is an odourless, viscous, colourless and hygroscopic liquid. (b) Trihydric alcohol has high boiling point tha

Atomic number, A transition metal X   has a configuration [Ar] 3d 4    in i...

A transition metal X   has a configuration [Ar] 3d 4    in its +3 oxidation state. Its atomic number is: (1) 25      (2) 26      (3) 22     (4) 19 Ans: 25

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