期刊
ACS MACRO LETTERS
卷 1, 期 1, 页码 241-245出版社
AMER CHEMICAL SOC
DOI: 10.1021/mz200184f
关键词
-
资金
- National Science Foundation [DMR-1105304]
- Welch Foundation through the W. T. Doherty-Welch Chair in Chemistry [A-0001]
Dumbbell-shaped triblock molecular brushes were synthesized by ring-opening metathesis polymerization (ROMP) of poly(lactide) macromonomers with terminal norbornene groups (NB-PLA) in a sequential addition manner. By changing the macromonomer size and the feed ratio of Grubbs' catalyst to macromonomer, the dimensions of the ball and bar'' of the dumbbell-shaped molecular brushes were controlled. The growth and production of well-defined structures were verified by gel permeation chromatography (GPC), and the final dumbbell-shaped architectures were visualized by atomic force microscopy (AFM). This synthetic methodology represents a rapid and convenient route to unique macromolecular topologies.
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