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Citation: LIU Zai-Man, DING Sheng-Long, LIU Ming-Zhu. Photo-Degradation Properties of Photo Biodegradable Polyethylene Films[J]. Chinese Journal of Applied Chemistry, ;2006, 23(8): 875-880. shu

Photo-Degradation Properties of Photo Biodegradable Polyethylene Films

1.
a School of Chemical and Biological Engineering, Lanzhou Jiaotong University, Lanzhou 730070;
2.
b College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou

Corresponding author: LIU Zai-Man,
Received Date: 3 September 2005
Available Online: 15 November 2005
Fund Project: 兰州交通大学"青蓝"人才工程基金资助项目(QL-05-21A) (QL-05-21A)

Photo-degradabilities,structures and degradation principles of photo-biodegradable plastic films containing 35% of corn starch were investigated by using FTIR,DSC,GPC and GC-MS.The experiment results show that the degradation rate could be regulated through different sensitizer and its content.Iron stearic and cerium stearic have the same photosensitive action on the film,which is better than that of diethyl iron dithiocarbamate.A suitable sensitizer concentration is about 0.2%~0.3%.With increasing the degree of degradation,the carbonyl index and crystallinity of polyethylene in films increase,but the melting point and relative molecular weight of polyethylene in films decrease.Some low molecular weight products,such as alkyl hydrocarbon,ketone,aldehyde,ester,carboxylic acid and binary carboxylic acid were detected in the degraded films.
- starch,
- polyethylene,
- plastic film,
- degradability
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