PEG and PEO are synonymous – they are different names for the same polymer. The word "glycol" refers to any organic compound containing two hydroxyl (OH) groups bound to different carbon atoms. Historically, PEG has tended to be used to refer to polymers with a molecular mass below 20,000 g/mol, whereas PEO has been used for larger polymers, though many people use the names interchangeably or prefer one over the other.

PEG and PEO are synonymous – they are different names for the same polymer. The word "glycol" refers to any organic compound containing two hydroxyl (OH) groups bound to different carbon atoms. Historically, PEG has tended to be used to refer to polymers with a molecular mass below 20,000 g/mol, whereas PEO has been used for larger polymers, though many people use the names interchangeably or prefer one over the other.

Polyethylene oxides and polyethylene glycols have a similar chemical structure. Differences lie in that polyethylene oxides are obtained by polymerization of ethylene oxide, and polyethylene glycols polycondensation of ethylene glycol molecules. Given the fact that the ethylene oxide in water easily reveals epoxide ring, turning into ethylene glycol, can be concluded about the identity of these polymer systems.

I agree with the two answers.

In fact, They are the same but for low molecular weight ( 2000) PEO

i had a same question

thank you all for answering

i had a same question

thank you all for answering

synthetic method of PEO, please.

Hula Tran, you may find interest in our works. We usually synthesis PEO by living anionic polymerization technique.

Hi Guys

I need to use PEG/PEO only one end active/polar? Which derivative of PEG you suggests?

@M. J. Abedin, you can use methoxy-PEG(mPEG)(widely available in market) and then convert the end group to any functional group of your interest.

Polyethylene Oxide is a different material than Polyethylene Glycol even though the two materials have the same CAS number. The differences are molecular weight and the manufacturing process. Polyethylene Oxide should not be called Polyethylene Glycol.

 The molecular weight of Polyethylene Oxide begins at 100,000 and goes up to 7,000,000 whereas Polyethylene Glycol only goes up to a molecular weight of 40,000.

The Polyethylene Oxides have not been consistently named in the IID. The same family of material has been described as Polyethylene Oxide Oral and Polyethylene Oxide 200K Oral and 7000K Oral with various maximum potency limits. All of these materials are the same product with the only difference being molecular weight. The molecular weight difference does not impact toxicity.