적하 종료 후, 중합액의 온도를 80℃로 유지한 채로 18시간 교반을 계속하고, 이어서 실온까지 냉각했다.
After completion of the dropwise addition, stirring was continued for 18 hours while maintaining the temperature of the polymerization solution at 80°C, followed by cooling to room temperature.