2014年10月
Stereoblock-like Brush Copolymers Consisting of Poly(L-lactide) and Poly(D-lactide) Side Chains along Poly(norbornene) Backbone: Synthesis, Stereocomplex Formation, and Structure-Property Relationship
MACROMOLECULES
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- 巻
- 47
- 号
- 20
- 開始ページ
- 7118
- 終了ページ
- 7128
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1021/ma501647m
- 出版者・発行元
- AMER CHEMICAL SOC
Random and block copolymerizations of poly(l-lactide) (PLLA) and poly(d-lactide) (PDLA) macromonomers having an exo-norbornene group at the alpha- or pi-chain end (D/L ratio = 1/1, M-n = ca. 5000 g mol(-1)) were performed via ring-opening metathesis polymerization to produce the brush random and block copolymers consisting of parallel or antiparallel aligned PLLA and PDLA side chains on a poly(norbornene) backbone. The molecular weight and polydispersity index of the brush copolymers were in the range of 40 300-458 000 g mol(-1) and 1.031.14, respectively. Despite such high molecular weights, these brush copolymers formed a stereocomplex without homochiral crystallization. The melting temperature (T-m) and crystallinity (X) of the resulting stereocomplex varied depending on the backbone length, relative chain direction, and distribution of the PLLA/PDLA side chains. The parallel brush copolymers showed significantly higher T-m and X values than the antiparallel ones.
- リンク情報
- ID情報
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- DOI : 10.1021/ma501647m
- ISSN : 0024-9297
- eISSN : 1520-5835
- Web of Science ID : WOS:000343949500014