Study of the preparation and degradable characteristics of CaCO3-PE film
The CaCO3-polyethylene (PE) film was prepared by filling method,and the filling amount of calcium carbonate in film was 20%(w/w).The effects of natural weathering,ultraviolet light irradiation on the tensile strength,breaking elongation and molecular weight of the CaCO3-PE film was invcstigatcd comparing with the photosensitizer-PE film.After being located in the open air for 30 d,the average tensile strength,average breaking elongation and the mean molecular weight of CaCO3-PE film decreased 80.6%,99.3% and 25.3%,respectively,as for the photosensitizer-PE film,the corresponding items decreased 18.8%,45.0% and 11.7%,respectively.After ultraviolet light irradiation for 120 h,the average tensile strength of CaCO3-PE film decreased 29.9%,the average tensile strength of the photosensitizer-PE film,however,increased 20.5%.The average breaking elongation of CaCO3-PE film and photosensitizer-PE film decreased 97.3% and 84.1% respectively,the mean molecular weight of both films decreased 66.7% and 26.6% respectively.After covered by soil for 200 d,the weight loss of the CaCO3-PE film and photosensitizer-PE was 2.15% and 0.22%,respectively.The results showed that the degradability of CaCO3-PE film is superior to the photosensitizer-PE film.
CaCO3-PE film preparation degradability
Xueyong Zhou Xiangyun Liu Lei Lu Lei Gu Jingjing Liu
Department of Food Science, Tianjin Agricultural University, Tianjin, China 300384 College of chemistry and chemical Engineering, Tianjin University of Technology, Tianjin, China30038 Department of Basic Science, Tianjin Agricultural University, Tianjin, China 300384
国际会议
杭州
英文
85-89
2012-03-23（万方平台首次上网日期，不代表论文的发表时间）