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Questions related from Ranjit De
I have a water soluble polymer (Mw ~ 9000 g/mol; No. of monomers ~ 45) with a bromine atom at one end of the chain. I want to convert this Br-group to -COOH group. The Br is attached to an...
06 June 2018 2,785 0 View
A polymer having COOH group is coupled with a polystyrene bead having primary amine group, then ninhydirn test carried out in ethanol solvent. Absence of a peak at around 580 nm shows that the...
06 June 2018 7,563 5 View
How to determine %conversion of monomer (sodium 4-styrenesulfonate) to polymer (sodium poly-(4-styrenesulfonate)) using 1H-NMR? Kindly provide step by step process. Thank you.
09 September 2017 5,832 5 View
I have a polymer sodium polystyrenesulfonate chain which has about 45 monomer unit and each unit contains one -SO3Na group. The chain also has one terminal unit with -COONa group instead of -SO3Na...
08 August 2017 5,760 2 View
What is the frequency of measurement in conductivity meter Model: Orion Star A212 (Thermo Fisher)? I searched the manual of this instrument but could not find it. Any help will be highly...
08 August 2017 10,031 4 View
A polymer chain containing 45 monomer units out of which only one monomer has -COONa group rest 44 monomer units are having -SO3Na group. Is it possible to detect the C=O group via FTIR? Any...
08 August 2017 9,918 10 View
Which acid to use to convert the ionizable groups containing -COONa and -SO3Na to -COOH and -SO3H groups in sodium polystyrenesulfonate chain so that I can bring the pH of aqueous solution of...
07 July 2017 7,745 3 View
I want to record the cyclic voltammogram of the aqueous solution of Sodium Polystyrenesulfonate solutions. Which reference, working and counter electrodes are suitable? What supporting electrolyte...
10 October 2016 776 9 View
How do I convert %R to Extinction in UVvis spectrum?
05 May 2015 3,302 5 View
I wish to know the surface charge density of colloid particles in water by means of a practical method in lab. Please also suggest me some relevant papers. Thank you in advance.
08 August 2014 7,139 3 View
I have tried to separate the chemical mode from electromagnetic mode using a spacer layer of polyvinylpyridine, but found that intensity of all the peaks are reduced equally in case of a Surface...
04 April 2014 4,377 3 View
