期刊
ACS MACRO LETTERS
卷 6, 期 6, 页码 609-612出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsmacrolett.7b00270
关键词
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资金
- National Science Foundation
- U.S. Department of Defense for a National Defense Science and Engineering
- Air Force Office of Scientific Research [FA9550-16-1-0017]
Frontal ring-opening metathesis polymerization (FROMP) has potential for use in rapid fabrication of structural polymers. However, the high activity of the ruthenium catalyst used for FROMP has limited the working time to <1 h. We report the use of alkyl phosphites as inhibitors for Grubbs' type catalysts to substantially extend working time. Subtle changes in alkyl phosphite structure are shown to impact both pot life and frontal velocity. Specifically, by varying phosphite structure and concentration, we are able to control pot life between 0.25 and 30 h while still allowing FROMP to proceed at velocities between 1 and 8 cm/min to yield fully cured thermoset polymers. These results are of interest for conventional ROMP synthesis and may open the way to new FROMP-based manufacturing possibilities.
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