Important synthetic rubbers: neoprene, Chemistry

Neoprene (GR: or Polychloroprene or Dupe)

Preparation: Neoprene is prepared by the free radical polymerisation of chloroprene in an emulsion system. Starting materials are acetylene and HCN. Neoprene can be vulcanised to considerable extent by heat alone. Its physical properties are enhanced by compounding it with metallic oxides like Zno or Mgo.

Properties:

(1)                         The presence of chlorine and Trans 1, 4 structures imparts superior resistance to vegetable and mineral oils and high temperature.

(2)                         The vulcanised products are found to have excellent tensile strength.

(3)                         It has good resistance to ozone and abrasion thereby preventing easy oxidative degration.

USES: neoprene is used for making:

(a)                          Gloves

(b)                         Industrial hoes and gaskets

(c)                          Insulation coating to wire and cables

(d)                         Tubing for carrying corrosive gases and oils

(e)                         Conveyer belts

(f)                           Sponges

(g)                          Shoes soles

Posted Date: 7/21/2012 8:31:14 AM | Location : United States







Related Discussions:- Important synthetic rubbers: neoprene, Assignment Help, Ask Question on Important synthetic rubbers: neoprene, Get Answer, Expert's Help, Important synthetic rubbers: neoprene Discussions

Write discussion on Important synthetic rubbers: neoprene
Your posts are moderated
Related Questions
Q. Give the general formula of Organic Acids? Ans. Organic acids have the general formula RCOOH. The R- is an alkyl group or hydrogen. The functional group is -COOH and

If uncertainty in the position of an electron is zero, the uncertainty in its momentum would be: (1) Zero    (2) (3) > h/ 2γ                            (4) Infinite


Q. Show properties of the Borax? Salts of boric acids are known as borates. As said earlier, hydrated borates occur naturally, e.g., borax, Na 2 B 6 0 11 . 5H 2 0, kernite, Na

Physical properties of Iodoform or tri-iodomethane (a) Iodoform is a yellow crystalline solid. (b) Iodoform has a pungent characteristic odour. (c) Iodoform is not solubl

Q.   Compare pot furnace and tank furnace used in manufacture of glass. Ans. S.NO. Pot furnace Tank furnace 1. Used f

Krypton ( 36 Kr)   has the electronic configuration (18 Ar) 4s 2 , 3d 10 , 4p 6    . The 37  electron will go into which one of the following sub-levels: (1) 4f

The angle among the lines joining the nuclei of the bonded atom with a central atom is known as bond angle.

Q. Illustrate Egg White Foams? Egg white foams when whipped or beaten, the air gets entrapped in the liquid present, and an interfacial tension is established between the ai

Ask question #M How do you calculate exactly how much ammonia you get from certain pressure changes using the equilibrium equation? Tried writing the equation like this: 2(1+x)^