[lch988]

Hi

I would like to test the molecular weight of polyethylene (PE) but am now wondering what type of solvent can I use to run PE in chromatography.

Does anyone has a clue whether DMF (dimethyl formamide) can be used? THF (tetrahydrofuran)?
Under what temperature does PE usually dissolve in solvents? How to prevent any degradation if any?

thanks a million!

[Kryolith]

Common solvents don't dissolve PE at low temperatures.

This link might help you

http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6TG8-48NJ46S-5&_user=10&_rdoc=1&_fmt=&_orig=search&_sort=d&view=c&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=daff529ecd96fa10ef2ce9d5117b3da1

[lch988]

thanks

[enahs]

Polyethylene is a polymer.
Depending on the manufacture, the conditions, etc etc, the molecular weight will be different.

And since some types of polyethylene polymers can get molecular weights into the millions, I do not know if I would go casually putting that in a chromatography column.


I would probably start with a Cannon-Fenske Viscometers and determine the MW first that way before I throw it into a column.

[youssim]

Hello
I need to know about solvent of LDPE and HDPE ?
who can help me ?