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- Title
Synthesis and crystallization-induced microphase separation of cellulose triacetate- block-poly(γ-benzyl- l-glutamate).
- Authors
Kamitakahara, Hiroshi; Baba, Akihiro; Yoshinaga, Arata; Suhara, Ryo; Takano, Toshiyuki
- Abstract
This article describes the first observation of crystallization-induced microphase separation in thin film and bulk cellulose triacetate- block-poly(γ-benzyl- l-glutamate) (PBLG) [cellulose triacetate (CTA)- b-PBLG] via copper-catalyzed azide-alkyne cycloaddition (CuAAC) between azido-functionalized CTA at the reducing end and alkyne-functionalized PBLG at the C-terminus. The reactivity of the amino group at the C-1 position of the glucosyl residue at the reducing end for the initiation reaction of the ring-opening polymerization (ROP) of γ-benzyl- l-glutamate N-carboxyanhydride was compared to that of the azido group at the reducing end of CTA for CuAAC, with PBLG bearing an alkyne group at the C-terminus. Although the amino group at the reducing end of CTA exhibited no reactivity as a macroinitiator for ROP of BLG, the azido group at the reducing end of CTA reacted with the alkyne group at the C-terminus of PBLG to afford CTA- b-PBLG. The structure of CTA- b-PBLG was characterized by H- and C-nuclear magnetic resonance spectroscopies, infrared spectroscopy, differential scanning calorimetry, and wide angle X-ray diffractometry. Microphase separation of the film and bulk of CTA- b-PBLG was clearly shown by atomic force microscopy, field-emission scanning electron microscopy, and transmission electron microscopy.
- Subjects
CELLULOSE synthase; CRYSTALLIZATION; PHASE separation; GLUTAMIC acid polymers; RING-opening polymerization
- Publication
Cellulose, 2014, Vol 21, Issue 5, p3323
- ISSN
0969-0239
- Publication type
Article
- DOI
10.1007/s10570-014-0383-3