PREPARATION OF POLYSTYRENE HOLLOW MICROSPHERES FROM WASTE FOAMED POLYSTYRENE PLASTICS BY MICROENCAPSULATION METHOD

摘要

Waste foamed polystyrene plastics were used as the main raw materials for the preparation of polystyrene hollow microspheres with high additional value by microencapsulation method. Firstly the preparation conditions were studied, such as the emulsifying time, the temperature and time of the solidification of oil phase, and then the method of removing the encapsulated water was discussed. The factors which influenced the average diameter and tap density of polystyrene hollow microspheres were also investigated, and finally the recycling technology of reagents used in experiment was discussed. Under optimum conditions, polystyrene hollow microspheres with the lowest tap density of 0.12g·cm-3 and average diameter from 40μm to 650μm were successfully produced.