What question did this study set out to answer?

The aim is to analyze the vibrational characteristics of poly(L‐lactic acid) in its different physical states.

Vibrational analysis of poly(L‐lactic acid)

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Vibrational analysis reveals structural characteristics of poly(L‐lactic acid) in different phases, indicating implications for material properties.

The aim is to analyze the vibrational characteristics of poly(L‐lactic acid) in its different physical states.
Recorded Raman and IR spectra from 3600 to 100 cm−1
Proposed complete vibrational assignments for various states
Identified characteristic splittings of v C=O stretching and δ CCO bend in the crystalline phase
Found two lines at 923 and 520 cm−1 indicating a 10 3 helical conformation

Kister et al. (1995) studied this question.

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Vibrational analysis reveals structural characteristics of poly(L‐lactic acid) in different phases, indicating implications for material properties.