【摘要】 以乳酸合成的低聚乳酸作为包膜材料采用物理法对尿素进行包裹 ,制作包膜尿素 .介绍了低聚乳酸的合成原理、制备方法和分析测试方法 ,并讨论加热时间对数均分子量的影响 .浸泡实验结果表明 ,聚乳酸的分子量越高 ,缓释放效果越好 .更多还原

【Abstract】 Taking low lactic acid polymer,which is compounded by lactic acid,as the membrane material and using physical method to wrap urea,i.e. membrane urea.It mainly introduces synthesis principle of low lactic acid polymer,way of preparation,way of analysis and test.It also discussed the impact of heating time to average molecular weight.The result of immersion experiment indicates that the more molecular weight of lactic acid polymer the better the effect of controlled release is.更多还原