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Biodegradation of a polylactic acid/polyvinyl chloride blend in soil
Author(s) -
Santana V. T.,
Gonçalves S. P. C.,
Agnelli J. A. M.,
MartinsFranchetti S. M.
Publication year - 2011
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.35685
Subject(s) - polyvinyl chloride , fourier transform infrared spectroscopy , materials science , polylactic acid , scanning electron microscope , dichloromethane , biodegradation , contact angle , chemical engineering , polymer chemistry , polymer , composite material , chemistry , organic chemistry , solvent , engineering
This study investigated the microbial action in soil on poly( L ‐lactic acid) (PLLA) and polyvinyl chloride (PVC) films and a PLLA/PVC 7 : 3 blend, using Fourier transform infrared spectroscopy (FTIR), contact angle and scanning electron microscopy (SEM). The films (50 μm) were obtained from the evaporation of dichloromethane solutions and buried in soil columns, in controlled conditions, for 120 days. The results showed that the surface of the PLLA films and blend became 18 and 31% more hydrophilic, respectively. The morphology of the films also changed after 120 days of microbial treatment, particularly that of the PLLA phase in the blend, confirmed by structural and conformational changes in the FTIR CO region at 1200–1000 cm –1 and an increase in the relative intensity of the band at 1773 cm –1 , which was attributed to CO group vibration due to a rotational isomer in the interlamellar region (semi‐ordered region). Besides the biotreated PVC presented changes in the CCl band at 738 cm –1 , due to the presence of some PVC conformational isomer. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012