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IJCT Vol.14(3) [May 2007] >


Title: Biodegradation of lactic acid and polyethylene glycol based polyester urethanes
Authors: Sarkar, Suparna
Adhikari, Basudam
Keywords: Polyester urethane
Biodegradation
Soil
Bacteria
Tensile strength
Elongation at break
Issue Date: May-2007
Publisher: CSIR
IPC CodeC08G63/00, C12P1/00
Abstract: A novel polyester urethane based on lactic acid and polyethylene glycol 400 (PEG400) was synthesized. The biodegradation of the polyester urethane under soil burial condition and by cultured bacteria (Pseudomonas aeruginosa) at different temperatures (5, 15, 37ºC) was studied. The biodegradation was assessed from the weight loss, tensile strength and ultimate elongation as well as chemical changes by FTIR spectroscopy and visual changes by optical and scanning electron microscopy. After 30 days of exposure of the polyester urethane films to cultured Pseudomonas aeruginosa around 33-36% degradation in terms of weight loss was observed. Under soil burial degradation the samples have shown 62% weight loss in 180 days but there is around 98 to 99% loss in tensile strength and elongation at break.
Page(s): 221-228
ISSN: 0971–457X
Source:IJCT Vol.14(3) [May 2007]

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