中文摘要：

在聚丙烯(PP ) 上增加温度和压力的路线的效果超级批评的水里的降级为开发再循环浪费塑料的一个过程被调查。一组实验被路线一为 30min ， 70min ，和 120min 在 26MPa ， 380 °C 的温度或 400 °C 的一个压力在一个反应系统执行(温度和压力的增加的功课经由到超级批评区域的气体的区域)，并且另外的组被路线二以相应成立条件执行(温度和压力的增加的功课经由到超级批评区域的液体区域)。增加的功课的时间关于 30min。产品被 Ostward 类型粘度计，气体的层析，和集体分光计(GC/MS ) 分析。描述结果建议温度和压力的不同增加功课将产生不同结果，尽管他们在类似的成立条件下面被对待。路线二在超级批评的水里的 PP 降级上是更有效的，这也被发现。

英文摘要：

The effect of increasing course of temperature and pressure on polypropylene （PP） degradation in supercritical water was investigated for developing a process of recycling waste plastic. A group of experiments was carded out in a reaction system at a pressure of 26MPa, temperature of 380℃ or 400℃ for 30min, 70min, and 120min by Course One （the increasing course of temperature and pressure is via gaseous regions to supercritical regions）, and the other group was carried out at corresponding holding conditions by Course Two （the increasing course of temperature and pressure is via liquid regions to supercritical regions）. The time of the increasing courses was about 30min. Products were analyzed by Ostward-type viscometer, gaseous chromatography, and mass spectrometers （GC/MS）. Characterization results suggested that different increasing courses of temperature and pressure would give rise to different results, although they were treated under the similar holding conditions. It was also found that Course Two was more effective on PP degradation in supercritical water.