Abstract: Dual polarization interferometry (DPI) technology is a label-free，real-time，precise and sensitive technique. It allows real-time，dynamic and quantitative determination of the density，thickness and mass for molecular bilayer or multilayer，revealing the relationship between molecular structure and interfacial activity. The principle and characteristics were briefly introduced and the current applications of DPI in polymer activity at solid-liquid interface were extensively reviewed. The process of polymer adsorption on oil-water interface by the experience of foreign scholars was studied for reference and the thermodynamic and kinetic model for polymer adsorption was established，and then the mechanism of the polymer adsorption on oil-water interface can be revealed from molecular level，providing new ideas and theoretical basis in the treatment of polymer-contained water. With the development of DPI，this technique can be applied in colloid surface chemistry，material surface chemistry and nanometer chemistry.

Key words: polymer, interface, adsorption, dual polarization interferometry, interaction

摘要： 双偏振干涉测量（dual polarization interferometry，简称DPI）技术具有无需标记、实时、精确测量的优点。因此它能对两相或者多相分子相互作用界面层的密度、厚度和质量进行实时地、动态地定量测量，从而了解分子结构与界面相互作用行为之间的关系。本文简单介绍了DPI的测量原理和特点，着重评述了DPI技术在研究聚合物固液界面行为方面的最新应用进展。通过借鉴国外学者的研究方法和模型，研究聚合物在油水界面的吸附过程，建立吸附过程热力学和动力学模型，从分子层面揭示聚合物在油水界面的吸附机理，为含聚污水处理提供新思路和理论依据。随着DPI研究应用的不断展开和深入，还可以应用于胶体表面化学、材料表面化学和纳米化学。

关键词: 聚合物, 界面, 吸附, 双偏振干涉测量技术, 相互作用