Ola Sundman

4 Questions 18 Answers 0 Followers

Questions related from Ola Sundman

How do I create a distribution plot from Mn, Mw and Mz values?

I know that normally the Mw, Mn and Mz values are sought and thus calculated from the distribution curves of GPC/SEC. I, however, need to go the other way. The Software for the GPC calculates...

29 August 2019 8,828 3 View

What is the pKa(s) of cellulose?

Dear all. I'm wondering what the pKa(s) of cellulose is. Is there a good measurement of this? I know that the monomer (glucose) has a first pKa of about 12.28 in 25 C but I can't find the...

07 December 2016 5,889 6 View

Hydrolysis of insoluble cellulose derivatives. How?

Hi. I have cellulose derivatives that are insoluble in acidic aqueous media. I want to hydrolyse them to monomers to analyse the sugar composition/substitution degree with MS. I have been thinking...

17 March 2015 804 9 View

How do you easily measure the degree of substitution of e.g. propyl, butyl or pentyl cellulose?

I want to know how the DS is measured/calculated for a (commercially non-existing) cellulose derivative, substituted with alkyl chains. I.e. cellulose that is substituted with chort chain alkyl...

07 November 2014 1,980 5 View