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用乌氏粘度计测定了不同分子结构的两性酚醛树脂 (APR系列钻井液降滤失剂 )在不同浓度无机盐 (NaCl)溶液中的相对粘度和特性粘数 ,研究了它的分子链构象对聚合物分子量、链净电荷数、浓度及无机盐浓度的依赖关系 ,同时与阴离子型磺化酚醛树脂 (钻井液降滤失剂SMP)的变化规律进行了比较。发现APR分子链构象受无机盐影响较SMP小 ;对于APR ,分子量越大 ,链净电荷数越多 ,则在良溶剂 (蒸馏水 )中特性粘数越大 ,链越伸展 ;但分子链对外加无机盐的敏感性同时也增大。
Using Ubbelohde viscometer, the relative viscosity and intrinsic viscosity of amphoteric phenolic resin (APR series drilling fluid filtrate reducer) in different concentrations of inorganic salt (NaCl) solution were determined. Its molecular chain conformation Polymer molecular weight, chain net charge number, concentration and concentration of inorganic salts, and at the same time with anionic sulfonated phenolic resin (drilling fluid filtrate reducer SMP) changes were compared. It was found that the conformation of APR molecule chain was less affected by inorganic salts than SMP. For APR, the larger the molecular weight and the more net charge, the larger the intrinsic viscosity in the good solvent (distilled water) The sensitivity of inorganic salts also increases.