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部分水解聚丙烯酰胺(PHP)的水解度通常以摩尔百分数表示,目前国内外在电导滴定、电位滴定及指示剂法滴定的水解度测定中,均以下式计算 PHP 样品的水解度:H%=(N_(HCl)×V_(HCl)×71/W)×100%式中 H%——水解度,表示 PHP 中含—COONa 链节的摩尔数占总链节摩尔数的百分数;N_(HCl)——HCl 标准溶液的当量浓度;V_(HCl)——消耗 HCl 标准溶液的毫升数;W——被测定试样重量的毫克数;71——丙烯酰胺单体链节“分子量”(式量)。
The degree of hydrolysis of partially hydrolyzed polyacrylamide (PHP) is usually expressed in mole%. At present, the degree of hydrolysis of PHP sample is calculated by the following formulas in conductivity determination, potentiometric titration and indicator titration. H% = (N HCl × V HCl × 71 / W) × 100% where H% is the degree of hydrolysis, indicating the percentage of moles of -COONa moieties in moles of total moles of moles in PHP; N HCl, ) - Equivalent concentration of HCl standard solution; V_ (HCl) - Milliliter of consumed HCl standard solution; W - Milligrams of weight of sample to be determined; 71 - “Molecular weight” of acrylamide monomer the amount).