期刊
MACROMOLECULAR RAPID COMMUNICATIONS
卷 37, 期 2, 页码 123-134出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/marc.201500503
关键词
free radicals; free radical polymerization; lasers; propagation rate coefficients; pulsed laser polymerization; size exclusion chromatography; PLP-SEC
资金
- Karlsruhe Institute of Technology (KIT)
- Helmholtz Association via STN program
- Ministry for Science and Arts of the State Baden-Wurttemberg
- Fonds Wetenschappelijk Onderzoek (FWO)
Detailed knowledge of the polymerization mechanisms and kinetics of academically and industrially relevant monomers is mandatory for the precision synthesis of tailor-made polymers. The IUPAC-recommended pulsed-laser polymerization-size exclusion chromatography (PLP-SEC) approach is the method of choice for the determination of propagation rate coefficients and the associated Arrhenius parameters for free radical polymerization processes. With regard to specific monomer classes-such as acrylate-type monomers, which are very important from a materials point of view-high laser frequencies of up to 500 Hz are mandatory to prevent the formation of mid-chain radicals and the occurrence of chain-breaking events by chain transfer, if industrially relevant temperatures are to be reached and wide temperature ranges are to be explored (up to 70 degrees C). Herein the progress and state-of-the-art of high-frequency PLP-SEC with pulse repetition rates of 500 Hz is reported, with a critical collection of to-date investigated 500 Hz data as well as future perspectives for the field.
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