標題: Determination of Percent Crystallinity of Side-Chain Crystallized Alkylated-Dextran Derivatives with Raman Spectroscopy and Multivariate Curve Resolution
作者: Samuel, Ashok Zachariah
Zhou, Mengbo
Ando, Masahiro
Mueller, Robert
Liebert, Tim
Heinze, Thomas
Hamaguchi, Hiro-o
應用化學系
應用化學系分子科學碩博班
Department of Applied Chemistry
Institute of Molecular science
公開日期: 3-May-2016
摘要: We demonstrate a methodology to estimate the percent crystallinity of polymers directly with Raman spectroscopy and multivariate curve resolution (MCR) by alternating least-squares (ALS). In this methodology, the Raman spectrum of semicrystalline polymer is separated into two constituent components (crystalline and molten) and their corresponding concentrations. The percent crystallinity can be estimated as the change in area intensity of the molten spectral-component when polymer cools from a temperature above melting point to room temperature. The number of carbons in the crystalline lattice has also been estimated from the position of longitudinal acoustic (LA) Raman bands with the correlation established by Mizushima and Simanouti [Mizushima, S.; Simanouti, T. J. Am. Chem. Soc. 1949, 71, 1320]. The new method allows direct Raman estimation of absolute percent crystallinity of polymers. Until now, Raman spectroscopic estimation of percent crystallinity was possible only in conjunction with other techniques or by using internal standards.
URI: http://dx.doi.org/10.1021/acs.analchem.5b04075
http://hdl.handle.net/11536/134041
ISSN: 0003-2700
DOI: 10.1021/acs.analchem.5b04075
期刊: ANALYTICAL CHEMISTRY
Volume: 88
Issue: 9
起始頁: 4644
結束頁: 4650
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