Abstract

A laboratory procedure has been suggested for determining the concentration of carboxyl groups at the surface of polystyrene microspheres at the latex concentration of a few hundredths of weight percentage (the COOH groups concentration below 4 × 10⁻⁴ mol/L). The procedure is based on conductometric and potentiometric titration. The influence of polymer particles concentration in the system, ionic strength of the solution, titration duration, and the system inertness on the obtained values of the carboxyl groups concentration and the determination accuracy have been investigated.

中文翻译：

---

聚合物微球中羧基的电导滴定和电位滴定

摘要

已建议采用实验室程序来测定聚苯乙烯微球表面的羧基浓度，胶乳浓度为百分之几重量百分比（COOH基团浓度低于4×10 -4 mol/L ^）。该程序基于电导滴定和电位滴定。研究了系统中聚合物颗粒浓度、溶液离子强度、滴定时间和系统惰性对羧基浓度所得值和测定精度的影响。