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用乌氏粘度计测定了不同结构的两性离子聚合物降滤失剂两性酚醛树脂在不同浓度无机盐溶液中的相对粘度和特性粘数,研究了其形态及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,同时与阴离子型聚合物降滤失剂磺化酚醛树脂的特性粘数变化规律进行了比较。结果表明,两性酚醛树脂分子链构象受无机盐的影响较磺化酚醛树脂小;对于两性酚醛树脂,分子量越大,链净电荷数越多,在良溶剂(纯水)中分子链特性粘数越大,链构象越伸展;但同时也增大了分子链对外加无机盐的敏感性。
Ubbelohde viscometer was used to determine the relative viscosity and intrinsic viscosity of the zwitterionic polymer fluid loss improver amphoteric phenolic resin in different concentrations of inorganic salt solution. The effects of morphology and conformation on the molecular weight, chain charge Number, concentration and concentration of inorganic salts, and at the same time, the relationship between the intrinsic viscosities and the intrinsic viscosities of the sulfonated phenolic resin was studied. The results showed that the molecular chain conformation of amphoteric phenolic resin was less affected by inorganic salts than that of sulfonated phenolic resin. For the amphoteric phenolic resin, the larger the molecular weight was, the more the net charge of chains was. The intrinsic viscosity The larger the chain conformation, the more stretched; but also increases the sensitivity of the molecular chain to added inorganic salts.