Chain stiffness and chain conformation of poly(α-methylene-γ-butyrolactone) in dilute solutions

Yuji Higaki, Ryosuke Okazaki, Tatsuya Ishikawa, Moriya Kikuchi, Noboru Ohta, Atsushi Takahara

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Abstract

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.

Original languageEnglish
Pages (from-to)6539-6545
Number of pages7
Journalpolymer
Volume55
Issue number25
DOIs
Publication statusPublished - Dec 1 2014

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All Science Journal Classification (ASJC) codes

  • Organic Chemistry
  • Polymers and Plastics
  • Materials Chemistry

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