Importance of vulcanization of rubber, Chemistry

Assignment Help:

Q. Explain: Vulcanization of rubber is necessary.

Ans. Importance of vulcanization of rubber:

1.                 Vulcanization makes cross-links between the long unsaturated hydrocarbon chains. This cross links presents intermolecular moments by anchoring, as a result of which, vulcanized rubber regains the original shape on removing stress.

2.                 The cross links may be directly from carbon to carbon or through an oxygen atom or through sulphur atom, or through all the three, therefore, percentage elongation at break decreases.

3.                 Water absorption tendency of rubber decreases.

4.                 Useful temperature range increases from 10-60 degree centigrade to -40-100 degree centigrade.

5.                 Chemical resistance of vulcanized rubber increases.

 

 


Related Discussions:- Importance of vulcanization of rubber

The equation, The equation Δ x Δp ≥ h/ 4Π   shows: (1) de-Broglie relat...

The equation Δ x Δp ≥ h/ 4Π   shows: (1) de-Broglie relation         (2) Heisenberg's uncertainty principle   (3) Aufbau principle (4) Hund's rule ans:  Heisenberg'

Detect the presence of synthetic food colours, Q. Detect the presence of sy...

Q. Detect the presence of synthetic food colours in the given samples? Objectives After conducting this activity, you will be able to: • describe the kind of natural

The number of orbitals in the fourth principal quantum no., The number of o...

The number of orbitals in the fourth principal quantum number will be: (1) 4               (2) 8        (3) 12               (4) 16 Ans: 16

Degree of unsaturation procedure, what is the procedure on how to get degre...

what is the procedure on how to get degree of unsaturation in a fruit

Which of the following orbital is not possible, Which of the following orbi...

Which of the following orbital is not possible: (1) 3 f             (2) 4 f            (3)5 f       (4) 6 f Ans: 3 f

Solution, a student prepared a solution of sodium carbonate by 2.111g of th...

a student prepared a solution of sodium carbonate by 2.111g of the solid to a 250.0ml volumentric flask and adding H2O to the mark.Some of this solution was transferred to a burett

Salt analysis, why is hcl used in acid radical

why is hcl used in acid radical

Seperation, what techniques can you use to separate solute from liquid

what techniques can you use to separate solute from liquid

Oxidation and reduction, Definitions  Oxidation exactly meant 'combinat...

Definitions  Oxidation exactly meant 'combination with oxygen' and reduction 'removal of oxygen'. These definitions have been illustrated. Oxidation implies combination with a

Structure of atoms, briefly explain laws of atoms with example

briefly explain laws of atoms with example

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