SEARCH Articles Figures Tables Carbonyl groups polyethylene Carboxyl end group for polyethylene terephthalate Carboxylic groups polyethylene Determination of Hydroxyl Groups in Polyethylene Glycol Silation - Spectrophotometry Methyl groups polyethylene Methylene groups polyethylene Molecular weight (and carboxyl end group for polyethylene terephthalate) Polyethylene hydroperoxide groups Polyethylene terephthalate characteristic group Polyethylene terephthalate groups Trans-vinylene groups polyethylene Vinyl groups polyethylene