Notices
Results 1 to 4 of 4

Thread: Polyethylene Glycol 300/400 conversion

  1. #1 Polyethylene Glycol 300/400 conversion 
    New Member
    Join Date
    Aug 2014
    Posts
    1
    I can only seem to find PEG in powder form. I need solution (cosmetics call for ml, not grams.) I see it has a very low melting point. Do I just melt it, or is there something else I have to do?


    Thanks!


    Reply With Quote  
     

  2.  
     

  3. #2  
    Bullshit Intolerant PhDemon's Avatar
    Join Date
    Feb 2013
    Location
    Newcastle-upon-Tyne, UK
    Posts
    5,297
    Are you sure you are using the right polymer? PEGs with a low enough molecular weight are liquid (I've used in the lab PEG400 which is a viscous liquid). Whenever I've had to use a solid PEG usually just holding the vial in your hand for few minutes is enough to melt it. If your container is too big for this just immerse it in warm water until it melts. If you are sure you have the right polymer this is all you need to do.


    Reply With Quote  
     

  4. #3  
    exchemist
    Join Date
    May 2013
    Location
    London
    Posts
    3,317
    Quote Originally Posted by SailingHome View Post
    I can only seem to find PEG in powder form. I need solution (cosmetics call for ml, not grams.) I see it has a very low melting point. Do I just melt it, or is there something else I have to do?


    Thanks!
    As PhDemon points out there is a large range of liquid PEGs. They have many industrial applications, including synthetic lubricants, as I know from my past work in the lubricants industry. Here's a link to a supplier chosen at random from the web, to give you a start on how to get some of the right MW: POLYETHYLENE GLYCOL / PEG - Buy from the UK's leading B2B chemical suppliers, ReAgent.
    Reply With Quote  
     

  5. #4  
    Bullshit Intolerant PhDemon's Avatar
    Join Date
    Feb 2013
    Location
    Newcastle-upon-Tyne, UK
    Posts
    5,297
    We use these guys Polypure - The PEG Designer they are expensive but guarantee the PEG sample is monodisperse (I.e. >98% of the polymer is the requested chain length -- important for the research I was doing). Most commercial PEG samples are a mixture of similar chain length PEGs, e.g. the PEG400 I mentioned earlier is a cheaper product and the quoted molecular weight is ~380-420, obviously an uncertified mixture of different chain lengths...
    Reply With Quote  
     

Similar Threads

  1. Ethyl Glycol Testing
    By tomw in forum Health & Medicine
    Replies: 0
    Last Post: November 2nd, 2012, 09:49 AM
  2. How do I remove organic material from high-density polyethylene?
    By Maarten334 in forum General Discussion
    Replies: 1
    Last Post: September 29th, 2012, 08:17 AM
  3. 400 nm laser pumped by HB fusion?
    By Green Xenon in forum Physics
    Replies: 2
    Last Post: December 12th, 2011, 11:55 PM
  4. Replies: 1
    Last Post: October 14th, 2011, 07:44 PM
  5. Fantastic PBS show- 400 years of telescopes.
    By MeteorWayne in forum Astronomy & Cosmology
    Replies: 1
    Last Post: March 23rd, 2011, 09:19 PM
Bookmarks
Bookmarks
Posting Permissions
  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •