【摘要】 粘度法测量聚合物相对分子量的原理是在溶液极稀时测量聚合物对溶剂粘度的影响程度。目前常采用单线法和双线法回归聚合物溶液比浓粘度与溶液浓度的关系式,根据关系式求出溶液浓度趋近于0时的比浓粘度,进而求得特性粘度,再由特性粘度经验方程计算出聚合物相对分子量。试验测定室内合成的聚合物钻井液处理剂,发现线性处理方法回归的比浓粘度与浓度关系式相关系数较低,认为测定的相对分子量误差较大,因而提出了用多项式法处理数据的新方法。该方法回归的关系式相关系数较高,计算的相对分子量与线性处理方法相比差距较大。用此方法对另一种聚合物钻井液处理剂的试验数据进行处理,结论相同。多项式法计算聚合物钻井液处理剂相对分子量的可行性得到进一步验证。更多还原

【Abstract】 The principle of measuring by viscosity means the polymer relative molecular weight is measuring the solvent viscosity influence degree by additives when its solution concentration is close to zero.Now single-line or double-line is adopted to regress the relation between the polymer solution reduced viscosity and its concentration.The trait viscosity is obtained by the regressed formula and the polymer relative molecular weight is calculated by the trait viscosity empiric equation.A polymer drilling fluid additive relative molecular weight of was measured in laboratory.The correlation coefficient of the relation regressed by the linear processing method is lower.So a novel polynome method for data processing for regressing the relation is developed,and its correlation coefficient is higher as well as the relative molecular weight calculated by the polynome means is more greater than that of the linear means.Another polymer drilling fluid additive data regression is made by the novel method,the same conclusion can be achieved.So the polynome method feasible to calculate the relative molecular weight of the polymer drilling fluid additives is further verified.更多还原