论文部分内容阅读
研究了疏水基含量和微嵌段长度对缔合聚合物,聚(丙烯酰胺-丙烯酸钠-十六烷基二甲基烯丙基氯化铵)[P(AM-NaAA-C16DMAAC)],弹性行为的影响规律。研究结果表明,对于结构类似且具有相近零剪切粘度的缔合聚合物,疏水基含量越高,聚合物分子链间形成稠密网络结构的疏水缔合能力越强,其第一法向应力差N1越大,N1出现拐点处对应剪切速率越小,缔合聚合物溶液弹性越好;并且缔合聚合物溶液的弹性随着疏水微嵌段长度的增加先增加后降低,存在最佳微嵌段长度。因此,可以通过调整分子结构有效改变缔合聚合物溶液的弹性行为。
The effects of the content of hydrophobic group and the length of micro-block on the mechanical properties of associative polymers, such as poly (acrylamide-sodium acrylate-hexadecyldiallylammonium chloride) [P (AM-NaAA- C16DMAAC) The law of behavior. The results show that the higher the hydrophobic group content is for the associative polymers with similar structure and similar zero-shear viscosity, the stronger the hydrophobic association ability is between the polymer molecular chains, and the first normal stress difference The larger the N1 is, the smaller the corresponding shear rate at N1 is, the better the solution elasticity of the associative polymer solution is; and the elasticity of the associative polymer solution first increases and then decreases with the increasing of the hydrophobic micro-block length, Block length. Therefore, the elastic behavior of the associative polymer solution can be effectively changed by adjusting the molecular structure.