An electron spin resonance study on y-irradiated poly(L-lactic acid)and poly(D,L-lactic acid) (Record no. 46242)

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control field MX-MdCICY
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control field 20250625140702.0
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Transcribing agency CICY
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Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-12030
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245 10 - TITLE STATEMENT
Title An electron spin resonance study on y-irradiated poly(L-lactic acid)and poly(D,L-lactic acid)
490 0# - SERIES STATEMENT
Volume/sequential designation Polymer Degradation and Stability, 50, p.297-304, 1995
520 3# - SUMMARY, ETC.
Summary, etc. The effect of gamma irradiation on poly(L-lactic acid)(L-PLA)and poly(~,~- lactic acid)(D,L-PLA), has been examined using ESR spectroscopy and through analysis of the changes in molecular weight. The G values for radical formation of both polylactic acids have been calculated at 77 and 300 K; G(R)=2-O at 77 K and G(R)= 1.5 at 300 K for L-PLA and G(R)= 2.4 at 77 K and G(R)= 1.2 at 300 K for D,L-PLA. The ESR spectrum at 300 K for the polymers was assigned to one radical, resulting from H atom abstraction from the quaternary carbon atom. The G values for crosslinking and scission have also been determined for the polymers at 300 K; G(S)= 2.3 and G(X)= 0.0 for D,L-PLA, G(S)= 2.4 and G(X)= 0.28 for L-PLA.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Babanalbandi, A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Hill, D. J. T.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name O'Donnell, J. H.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Pomery, P. J.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Whittaker, A.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1C-Z5m7x-72evBp0gF4uMFKMV-SgHTuUE/view?usp=drivesdk">https://drive.google.com/file/d/1C-Z5m7x-72evBp0gF4uMFKMV-SgHTuUE/view?usp=drivesdk</a>
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-12030 25.06.2025 25.06.2025 Documentos solicitados