Processing of poly(lactic acid): Characterization of chemical structure, thermal stability and mechanical properties (Record no. 52837)

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fixed length control field 02201nam a2200289Ia 4500
003 - CONTROL NUMBER IDENTIFIER
control field MX-MdCICY
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20250625162417.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-18691
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 250602s9999 xx |||||s2 |||| ||und|d
245 10 - TITLE STATEMENT
Title Processing of poly(lactic acid): Characterization of chemical structure, thermal stability and mechanical properties
490 0# - SERIES STATEMENT
Volume/sequential designation Polymer Degradation and Stability, 95, p.116-125, 2010
520 3# - SUMMARY, ETC.
Summary, etc. The processing of poly(lactic acid)(injection and extrusion/injection)as well as annealing of processed materials were studied in order to analyze the variation of its chemical structure, thermal degradation and mechanical properties. Processing of PLA was responsible for a decrease in molecular weight, as determined by GPC, due to chain scission. The degree of crystallinity was evaluated by means of differential scanning calorimetry and X-ray diffraction. It was found that mechanical processing led to the quasi disappearance of crystal structure whereas it was recovered after annealing. These findings were qualitatively corroborated by means of FTIR. By analyzing 1 H NMR and 13 C NMR chemical shifts and peak areas, it was possible to affirm that the chemical composition of PLA did not change after processing, but the proportion of methyl groups increased, thus indicating the presence of a different molecular environment. The thermal stability of the various materials was established by calculating various characteristic temperatures from thermograms as well as conversion and conversion derivative curves. Finally, the mechanical behaviour was determined by means of tensile testing (Young modulus, yield strength and elongation at break).
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element POLY(LACTIC ACID)
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element INJECTION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element EXTRUSION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element CRYSTALLINITY
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element DEGRADATION
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element TENSILE TESTING
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Carrasco, F.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Pagès, P.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Gámez-Pérez, J.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Santana, O.O.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Maspoch, M.L.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1LNIoUclMk0sXIFtjURfzll3imm4PTNHu/view?usp=drivesdk">https://drive.google.com/file/d/1LNIoUclMk0sXIFtjURfzll3imm4PTNHu/view?usp=drivesdk</a>
Public note Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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Source of classification or shelving scheme Clasificación local
Koha item type Documentos solicitados
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-18691 25.06.2025 25.06.2025 Documentos solicitados