title: Determination of Percent Crystallinity of Side-Chain Crystallized Alkylated-Dextran Derivatives with Raman Spectroscopy and Multivariate Curve Resolution.
abstract: 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.
authors.affiliation: Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University , 1001 Ta-Hsueh Road, Hsinchu 30010, Taiwan.
authors.forename: Ashok Zachariah
authors.initials: AZ
authors.lastname: Samuel
authors.affiliation: Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University of Jena , Humboldtstrasse 10, D-07743 Jena, Germany.
authors.forename: Mengbo
authors.initials: M
authors.lastname: Zhou
authors.affiliation: Waseda University , Consolidated Research Institute for Advanced Science and Medical Care, 513 Wasedatsurumaki-cho, Shinjuku-ku, Tokyo 162-0041, Japan.
authors.forename: Masahiro
authors.initials: M
authors.lastname: Ando
authors.affiliation: Leibniz Institute of Photonic Technology e.V. (IPHT) , Postfach 100239, D-07702 Jena, Germany.
authors.forename: Robert
authors.initials: R
authors.lastname: Mueller
authors.affiliation: Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University of Jena , Humboldtstrasse 10, D-07743 Jena, Germany.
authors.forename: Tim
authors.initials: T
authors.lastname: Liebert
authors.affiliation: Institute of Organic Chemistry and Macromolecular Chemistry, Friedrich Schiller University of Jena , Humboldtstrasse 10, D-07743 Jena, Germany.
authors.forename: Thomas
authors.initials: T
authors.lastname: Heinze
authors.affiliation: Department of Applied Chemistry and Institute of Molecular Science, National Chiao Tung University , 1001 Ta-Hsueh Road, Hsinchu 30010, Taiwan.
authors.forename: Hiro-O
authors.initials: HO
authors.lastname: Hamaguchi