different between polyoxymethylene vs polyoxyethylene

English

poly- +? oxy- +? methylene

polyoxymethylene (countable and uncountable, plural polyoxymethylenes)

(chemistry) A polymer of formaldehyde having a repeat unit of -CH₂-O- ; it is used in engineering to make small gears etc

poly- +? oxy- +? ethylene

polyoxyethylene (plural polyoxyethylenes)

(chemistry) any polymer of ethylene glycol having a general formula HO-(CH₂CH₂O)_n-H; they are used in the manufacture of emulsifiers

The degree of polymerization is sometimes indicated with a numerical suffix in brackets

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