Standard Test Method for Rubber Chemical Antidegradants—Purity of <emph type="bdit" >p</emph>-Phenylenediamine (PPD) Antidegradants by High Performance Liquid Chromatography— 4 стр.
Standard Test Method for Rubber Chemical Antidegradants—;Purity of <emph type="bdit" >p</emph>-Phenylenediamine (PPD) Antidegradants by High Performance Liquid Chromatography— 4 стр.