期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 36, 期 18, 页码 1646-1650出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201500171
关键词
cyclic polymers; photodimerization; poly(epsilon-caprolactone); ring-opening polymerization
资金
- National Natural Science Foundation of China [51373046, 51473045]
- Natural Science Foundation of Hebei Province [B2014202013]
- High-level Excellent Talents in University of Hebei Province
- Changjiang Scholars and Innovative Research Team in University [IRT13060]
- New Century Excellent Talents in University [NCET-10-0125]
- Fusion Research Program for Green Technologies through the National Research Foundation of Korea from MEST [2012M3C1A1054502]
- BK21 PLUS program
High molecular weight cyclic poly(epsilon-caprolactone)s (cPCLs) with variable ring size are synthesized via light-induced ring closure of alpha,omega-anthracene-terminated PCL (An-PCL-An). The ring size of cPCL is tunable simply by adjusting the polymer concentration from 10 to 100 mg mL(-1) in THF. The cycloaddition via the bimolecular cyclization of An-PC-An is well characterized by a variety of analyses such as H-1 NMR and UV-vis spectroscopies, gel-permeation chromatography, and differential scanning calorimetry. The reversible dimerization of An induced by heating enables the cyclic PCL to have a switchable on-off capability. This novel light-induced ring-closure technique can be one of the most powerful candidates for producing various well-defined cyclic polymers in highly concentrated polymer solution.
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