Gas permeation properties of poly(lactic acid) (Record no. 40657)

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control field 20250625124640.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-6313
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
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245 10 - TITLE STATEMENT
Title Gas permeation properties of poly(lactic acid)
490 0# - SERIES STATEMENT
Volume/sequential designation Journal of Membrane Science, 190(2), p.243-251, 2001
520 3# - SUMMARY, ETC.
Summary, etc. The need for the development of polymeric materials based on renewable resources has led to the development of poly(lactic acid)(PLA)which is being produced from a feedstock of corn rather than petroleum. The present study examines the permeation of nitrogen, oxygen, carbon dioxide, and methane in amorphous films of PLA cast from solution. The properties of PLA are compared to other commodity plastics and it is shown that PLA permeation closely resembles that of polystyrene. At 30°C, N2 permeation in PLA is 1.3 (10-10 cm3 (STP)cm/cm2 s cmHg)and the activation energy is 11.2 kJ/mol. For oxygen the corresponding values are 3.3 (10-10 cm3(STP)cm/cm2 s cm Hg)and 11.1 kJ/mol. The values for carbon dioxide permeation are 1.2 (10-10 cm3 (STP)cm/cm2 s cmHg)and 6.1 kJ/mol. For methane values of 1.0 (10-10 cm3 (STP)cm/cm2 s cmHg)and an activation energy of 13.0 kJ/mol are found. Studies with pure gases show that polymer chain branching and small changes in : stereochemical content have no effect on permeation properties. Crystallinity is found to dominate permeation properties in a biaxially oriented film. The separation factor for a CO2/CH4 mixed gas system is measured between 0 and 50°C and does not deviate significantly from the calculated ideal separation factor; at 0°C the separation factor is 16, a value that suggests continued studies of PLA as a separation medium are warranted.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element GAS AND VAPOR PERMEATION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element GAS SEPARATIONS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element BARRIER MEMBRANES
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element POLY(LACTIC ACID)(S)
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element POLYLACTIDE(S)
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Lehermeier, H.J.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Dorgan, J.R.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Way, J.D.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/13MBVYR_rqgJM_61WxFp9GfAR2sXwPUFy/view?usp=drivesdk">https://drive.google.com/file/d/13MBVYR_rqgJM_61WxFp9GfAR2sXwPUFy/view?usp=drivesdk</a>
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-6313 25.06.2025 25.06.2025 Documentos solicitados