Using sulfonated EPDM ionomer as coating material for controlled release of urea, a primary research on some factors that influence the controlled release rate has been completed.

• 用乙丙三元胶 (EPDM)的磺酸型离聚物作为包膜材料 ,研究了其对尿素的缓释作用 ,考察了离聚物的合成条件以及环境温度对尿素释放速率的影响。