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ID: 130749

Influence of temperature on the conformational guided physical / Pandit, Pallavi; Banerjee, Mandira; Mukherjee, G. S; Parikh, Rakesh, Deshpanday, U. P, Gupta, Ajay

Mukherjee, G. S	Journal Article
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2014.

Summary/Abstract

Poly (L lactic acid) (PLLA) ultrathin films of various thicknesses were prepared by spin coating method and investigated by using vibrational spectroscopic techniques such as FTIR and Raman. The analysis has been done in two parts: first one is verification of structural mode to understand the visibility of characteristic band to confirm the PLLA structure; where interestingly, as the thickness of the film increased, the structural features were found to be more explicit. The second part of the study was to observe the features of the film having been annealed for 1 h in two separate temperatures, one at specific annealing temperature 120 °C and the other at 160 °C to enable PLLA chains to reorient to get crystallized from its soften state at two such specific temperatures. The isothermal crystallization behavior of PLLA film at 120 °C and 160 °C from the melt was monitored by FTIR as well as Raman spectroscopies. More importantly, the band at 921 cm-1 corresponds to ? crystalline phase of PLLA has been observed even in this ultrathin film with the effective application of temperature as selected in this study.

Key Words

Biophysics ; Biochemistry ; Temperature ; Physics ; FTIR ; Physical Properties ;
Ultrathin Film ; Biopolymer ; X-Ray Reflectivity ; PLLA ; Raman Law ; Vibrational Spectroscopic Techniques - VST ;
Annealing Temperature ; Specific Temperature ; Separate Temperatures ; Poly L Lactic Acid - PLLA

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ID: 047107

Participatory watershed development: challenges for the twenty-first century / Farrington, John (ed); Turton, Cathryn (ed); James, A. J (ed)

1999

Farrington, John	Book
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Publication	New Delhi, Oxford Unversity Press, 1999.
Description	xviii, 382p.
Standard Number	0195651359

Key Words

Biophysics ; Economic Evoluation ; Watershed Development

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Accession#	Call#	Current Location	Status	Policy	Location
044356	333.91/FAR 044356	Main	On Shelf	General