光—生物双降解聚苯乙烯泡沫塑料降解性研究  

Study of Degradability on Photosensitized and Degradable Foamed Plastics Polystyrene

作　　者：沈洲[1] 韩朔睽[1] 张爱茜[1] 

机构地区：[1]南京大学,南京210093

出　　处：《上海环境科学》1998年第5期40-43,共4页Shanghai Environmental Sciences

摘　　要：研究了一种用来制造快餐盒的光—生物双降解聚苯乙烯(PS)发泡塑料的降解性能及其影响因素。结果表明:双解PS样品能在可见光照射下发生光降解,在真菌作用下发生微生物降解,光降解对微生物降解无明显促进作用,真菌能够利用双解PS表面和内部的改性淀粉;双解PS片材与餐盒在重量变化率上的显著差异揭示了生产过程中的机械冲压是餐盒微生物降解性能降低的主要原因。The degradability and its effecting factors have been studied for a kind of photosensitized and biodegradable foamed plastics polystyrene used to manufacture boxes for fast food items, Degradation by fungus or visible light was observed. The results indicated that visible light exposure showed no positive effect on the microbiological degradation. The fungus could utilize the starch inside and outside the plastics. The significant difference of the rate of lost weight between sheet material and box revealed that the great pressure on the punch suffered in the process of making box resulted in the reduction of biodegradability.

关 键 词：可降解塑料 聚苯乙烯 光降解 微生物降解 

分 类 号：TQ328.4[化学工程—合成树脂塑料工业]