Sarita,G Bhat; Zeena, Hamza P; Anna Dilfi, K F; Thomas, Kurian(Taylor & Francis, November 24, 2008)
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Abstract:
Low-density polyethylene, (LDPE) was mixed with two grades of tapioca starch–lowgrade
and high-grade. Various compositions were prepared and mechanical and
thermal studies performed. The biodegradability of these samples was checked
using a culture medium containing Vibrios (an amylase-producing bacteria), which
was isolated from a marine benthic environment. The soil burial test and reprocessability
of these samples were checked. The studies on biodegradability show that
these blends are partially biodegradable. These low-density polyethylene-starch
blends are reprocessable without sacrificing much of their mechanical properties
Description:
International Journal of Polymeric Materials, 58:257–266, 2009
Anna Dilfi, K F; Dr.Thomas, Kurian(Cochin University of Science & Technology, August , 2011)
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Abstract:
Various compositions of linear low density polyethylene(LLDPE) containing bio-filler(either starch or dextrin)of various particle sizes were prepared.The mechanical,thermal,FTIR,morphological(SEM),water absorption and melt flow(MFI) studies were carried out.Biodegradability of the compositions were determined using a shake culture flask containing amylase producing bacteria(vibrios),which were isolated from marine benthic environment and by soil burial test. The effect of low quantities of metal oxides and metal stearate as pro-oxidants in LLDPE and in the LLDPE-biofiller compositions was established by exposing the samples to ultraviolet light.The combination of bio-filler and a pro-oxidant improves the degradation of linear low density polyethylene.The maleation of LLDPE improves the compatibility of the c blend components and thepro-oxidants enhance the photodegradability of the compatibilised blends.The responsibility studies on the partially biodegradable LLDPE containing bio-fillers and pro-oxidants suggest that the blends could be repeatedly reprocessed without deterioration in mechanical properties.
Description:
Dept.of Polymer Science and Rubber Technology,Cochin University of Science and Technology