AMPHIPHILIC MACROMOLECULAR EMULSIFIER WITH SWITCHABLE SURFACE ACTIVITY AND USE THEREOF IN PREPARATION OF POLYMER LATEX

摘要

Disclosed are a macromolecular emulsifier with switchable surface activity and use thereof in the preparation of polymer latex. By using the macromolecular emulsifier with switchable surface activity as an emulsifier, the polymer latex capable of being reversibly coagulated and re-dispersed can be prepared via emulsion polymerization. The polymer latex can achieve the coagulation of latex particles by heating and aerating with nitrogen, air and inert gas, and/or adding a small quantity of alkaline solution; the coagulated latex particles can be restored and re-dispersed into stable latex by aerating with carbon dioxide and/or adding a small quantity of acid solution. The coagulation and re-dispersion process is reversible and is easy to control.