Ask a Doubt
Request a call back

Join NOW to get access to exclusive study material for best results

CBSE Class 12-science Answered

What is the difference between Buna S and Buna N ?......:)
Asked by Pooja R | 22 Aug, 2011, 12:00: AM
answered-by-expert Expert Answer
Styrene-Butadiene or Styrene-Butadiene-Rubber (SBR) is a synthetic rubber copolymer consisting of styrene and butadiene. It has good abrasion resistance and good aging stability when protected by additives, and is widely used in car tires, where it may be blended with natural rubber.
The material was initially marketed with the brand name Buna S. It derives this name from: Bu for butadiene, Na for sodium
Nitrile rubber, also known as Buna-N, Perbunan, or NBR, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene.
Answered by | 23 Aug, 2011, 03:32: PM

Concept Videos

Multiple Choice Questions Practice Test
Answered Unanswered My Questions My Answers
CBSE 12-science - Chemistry
A polymer sample contains 30%(by weight) of chains with molecular weight 10000, 30%(by weight) of the chains with molecular weight 20000, and the rest of chains with molecular weight 30000. Calculate the number average and weight average molecular weight of the sample.
Asked by me.shekharhimanshu | 19 Jun, 2020, 12:03: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
For viva..pl as soon as possible 
question image
Asked by jain.pradeep | 19 Jan, 2020, 11:06: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
give differnent uses of bakelite and PHBV
Asked by yashwant.mcr3004 | 10 Oct, 2019, 12:31: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
In a polymer sample 30% of molecules have a molecular mass 20,000, 40% have 30,000 and the rest 60,000. What is the weight average molecular mass of the polymer? (1) 40,300, (2) 30,600, (3) 43,333, (4) 50,400
Asked by patra04011965 | 14 May, 2019, 07:55: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Write the structures of monomers used to obtain the following polymers: (a) Natural rubber (b) PVC (c) Nylon-6,6
Asked by sanjeet.kumar | 12 Mar, 2019, 02:18: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
How are polymers classified on the basis of synthesis?
Asked by Topperlearning User | 22 Jun, 2016, 12:37: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
Monomers combine with the loss of a simple molecule in the case of which polymerization reaction?
Asked by Topperlearning User | 22 Jun, 2016, 12:34: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
What happens when 'n' number of ethylene molecules are added up?
Asked by Topperlearning User | 17 Oct, 2014, 09:40: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
How natural polymers differ from synthetic polymer?
Asked by Topperlearning User | 17 Oct, 2014, 09:40: AM
ANSWERED BY EXPERT ANSWERED BY EXPERT
CBSE 12-science - Chemistry
What is natural rubber?
Asked by Topperlearning User | 23 Jun, 2014, 04:35: PM
ANSWERED BY EXPERT ANSWERED BY EXPERT
My Class Videos Tests ₹ Plans Ask a Doubt
Get Latest Study Material for Academic year 24-25 Click here
×