Fabrication of rubber objects, Chemistry

Assignment Help:

Q. Write short notes on fabrication of rubber objects.

Sol. Fabrication of Rubber: in the row condition rubber is composed of molecules of great length and molecular weight. Although it is thermoplastic in this condition its plasticity can be improved by working or masticating the rubber in air at room temperature. This has the effect of partially oxidizing rubber resulting in fragmentation of the large molecules into more plastic but smaller ones. For various objects different process are used which are described below.

(1)                         Extrusion: the machine used for extrusion of rubber is sometimes called a tuber which is used for extruding continuous length of tread and side wall stock for tyres. The continuous strips are later cut into proper length to make tyre.

(2)                         Calendaring: the process is used for making continuous sheets of rubber or impregnating fabric with rubber. If the circum perennial speed of the rolls is faster than the speed of the cloth the process is called fractioning and rubber compound is wiped into the voids of the fabric.

(3)                         Moulding: moulding of rubber parts is accomplished mainly by compression moulding and transfer moulding.

(4)                         Dipping and Electrode position: both are used to produce shapes such as gloves face masks and balloons from latex. The same way as metals are deposited from solutions.sss

 

 


Related Discussions:- Fabrication of rubber objects

Platinichloride method for bases - chemical methods, Platinichloride Method...

Platinichloride Method for Bases - Chemical Methods Organic bases combine along with chloroplatinic acid, H 2 PtCl 6 to make insoluble platinichlorides, that on ignition, opt

What is the stability order of li2, what is the stability order of Li2, H2,...

what is the stability order of Li2, H2, B2 B.O of Li2 is 1 B.O of H2 is 1 B.O of B2 is also 1 so for stability order u need to see the no of electrons in antibonding orbitals mo

Cengage online, There are three assignments due on the 25th I can''t give t...

There are three assignments due on the 25th I can''t give the questions because it is online

Alcohols, Action of grignard reagents on carbonyl compounds with examples

Action of grignard reagents on carbonyl compounds with examples

Arenes, the most stable structure of chrysene

the most stable structure of chrysene

Sets of quantum numbers is correct for an electron, Which of the following ...

Which of the following sets of quantum numbers is correct for an electron in 4f orbital: (1) n-=4, l=3. m+1, s= +1/2              (2) n-=4, l=4. m-4, s= -1/2

Addition polymerization, Addition polymerization: It involves following th...

Addition polymerization: It involves following three mechanisms: 1.                 Free radical polymerization 2.                 Ionic polymerization mechanism 3.

Physical chemisty, Calculate the ratio of d number of molecules in two ener...

Calculate the ratio of d number of molecules in two energy levels at 27''c given E2=9.75x10"-13erg/mol E1=6.95X10"-13erg/mol g1=2 g2=3

Scientific and Ordinary Notation, How is 7.979 times 10 to the 4th in scien...

How is 7.979 times 10 to the 4th in scientific notation for the ordinary notation: 7979?

Properties and uses of different silicate glasses, Q.   Describe properties...

Q.   Describe properties and uses of different silicate glasses and also discuss the importance of annealing in the manufacture of glass.

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