TY - JOUR
T1 - Chain stiffness and chain conformation of poly(α-methylene-γ-butyrolactone) in dilute solutions
AU - Higaki, Yuji
AU - Okazaki, Ryosuke
AU - Ishikawa, Tatsuya
AU - Kikuchi, Moriya
AU - Ohta, Noboru
AU - Takahara, Atsushi
N1 - Funding Information:
The synchrotron radiation experiments were performed at BL40B2 in the SPring-8 facility with the approval of the Japan Synchrotron Radiation Research Institute (JASRI) (Proposal No.2012A1023). This work was supported by JSPS KAKENHI Grant-in-Aid for Young Scientists (B) (Grant Number 25810077 ). This work was also supported by Photon and Quantum Basic Research Coordinated Development Program from the Ministry of Education, Culture, Sports, Science and Technology, Japan.
Publisher Copyright:
© 2014 Elsevier Ltd. All rights reserved.
PY - 2014/12/1
Y1 - 2014/12/1
N2 - The chain stiffness and local chain conformation of atactic poly(α-methylene-γ-butyrolactone) (PMBL), which is a side chain cyclic structural analog of poly(methyl methacrylate) (PMMA), with a weight-average molecular weight (Mw) ranging from 2.8 × 103 to 2.6 × 106 in N,N-dimethylformamide (DMF) and γ-butyrolactone (GBL) were characterized by size exclusion chromatography with a multi-angle light-scattering detector (SEC-MALS) and synchrotron radiation small-angle X-ray scattering (SAXS). Based on the Kratky-Porod worm-like chain model, the scattering functions and the Mw dependence of z-average root-mean-square radius of gyration <S2>z 1/2 yielded the Kuhn segment lengths λ-1, the diameter of the PMBL chains d, and the excluded-volume strengths in DMF and GBL. The local conformation of atactic PMBL in DMF and GBL were slightly larger than those of atactic PMMA, due to the presence of the conformationally rigid lactone ring structure.
AB - The chain stiffness and local chain conformation of atactic poly(α-methylene-γ-butyrolactone) (PMBL), which is a side chain cyclic structural analog of poly(methyl methacrylate) (PMMA), with a weight-average molecular weight (Mw) ranging from 2.8 × 103 to 2.6 × 106 in N,N-dimethylformamide (DMF) and γ-butyrolactone (GBL) were characterized by size exclusion chromatography with a multi-angle light-scattering detector (SEC-MALS) and synchrotron radiation small-angle X-ray scattering (SAXS). Based on the Kratky-Porod worm-like chain model, the scattering functions and the Mw dependence of z-average root-mean-square radius of gyration <S2>z 1/2 yielded the Kuhn segment lengths λ-1, the diameter of the PMBL chains d, and the excluded-volume strengths in DMF and GBL. The local conformation of atactic PMBL in DMF and GBL were slightly larger than those of atactic PMMA, due to the presence of the conformationally rigid lactone ring structure.
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U2 - 10.1016/j.polymer.2014.10.026
DO - 10.1016/j.polymer.2014.10.026
M3 - Article
AN - SCOPUS:84911462948
SN - 0032-3861
VL - 55
SP - 6539
EP - 6545
JO - polymer
JF - polymer
IS - 25
ER -