无机盐对水溶液中两性离子聚合物分子线团尺寸的影响

INFLUENCES OF INORGANIC SALTS ON MOLECULARCOIL DIMENSION OF AMPHOTERIC POLYMERS

初步考察了无机盐对水溶液中两性离子聚合物分子线团尺寸的影响，发现分子结构因素（如分子量、基团类型与含量等）以及无机盐浓度与种类等因素都影响水溶液中两性离子聚合物的分子线团尺寸。

he molecular coil dimensions of six amphoteric polymers in aqueous salt solutions are determined and discussed in relation to salt concentrations (0-1.0×104 ppm) and species (NaCl, CaCl2 and MgCl2)as well as to structural characteristics of polymers. The experimental polymers contain ～50% anionic carboxyl and sulfo groups and different (aliphatic and aromatic pendant and cyclic inchain) cationic groups in various populations and have different molecular masses. It is shown that all these factors above mentioned influence the molecular coil dimension in aqueous solutions of these amphoteric polymers as drilling fluid additives. 