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- Title
Synthesis and Solution Self-Assembly of Polyisoprene- block-poly(ferrocenylmethylsilane): A Diblock Copolymer with an Atactic but Semicrystalline Core-Forming Metalloblock.
- Authors
Du, Van An; Qiu, Huibin; Winnik, Mitchell A.; Whittell, George R.; Manners, Ian
- Abstract
Polyisoprene- block-poly(ferrocenylmethylsilane) (PI- b-PFMS) copolymers, containing the atactic but semicrystalline PFMS block, have been prepared by sequential anionic polymerization of isoprene and methyl[1]silaferrocenophane. The reaction to form the metalloblock is not living in nature, but still enabled three block copolymers to be prepared (PI35- b-PFMS5, PI200- b-PFMS10, and PI247- b-PFMS23) with relative narrow molar mass distributions (polydispersity < 1.3). The self-assembly of all three materials was studied in PI selective n-alkanes and found to afford lenticular platelets, tapered cylindrical micelles, and regular cylinders, as the length of the PFMS block increased. PI200- b-PFMS10 micelles could be increased in length by self-seeding a sample of short micelles at temperatures of 90 °C and above; however, this process also resulted in an increase in width. Addition of a solution of PI247- b-PFMS23 copolymer to preformed seed micelles also resulted in an increase in length, although growth is not linearly related to the amount of copolymer added beyond ≈600 nm.
- Subjects
POLYISOPRENE; METHYLSILANE; DIBLOCK copolymers; POLYMERIZATION; ALKANES
- Publication
Macromolecular Chemistry & Physics, 2016, Vol 217, Issue 15, p1671
- ISSN
1022-1352
- Publication type
Article
- DOI
10.1002/macp.201600028