Download Advances in Controlled/Living Radical Polymerization by Krzysztof Matyjaszewski PDF

By Krzysztof Matyjaszewski

Offers new advancements in controlled/living radical polymerization in 3 parts: atom move radical polymerization (ATRP), nitroxide mediated polymerization (NMP), and reversible addition-fragmentation move (RAFT). additionally contains synthesis and characterization of many new materials.

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C) Lutz, J. - F . ; Boutevin, B. Macromol. Rapid Commun. 2001, 22, 189. ; van der Linde, R. Macromolecules 2001, 34, 6169. ; van der Linde, R. Macromolecules 2002, 35, 2261. ; German, A . L . Macromolecules 2002, 35, 3420. ; Matyjaszewski,K. J. Am. Chem. Soc. 2002, 124, 8196. (h) Shipp, D. ; Yu, X . Polym. Prepr. (Am. Chem. , Div. Polym. ) 2002, 43(2), 7. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2003. 39 3. 4. 5. ch003 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19.

From EPR, that such mid-chain radicals play a major role in termination during D A polymerization, but are not important during homopolymerization of the other monomers. A large fraction of mid-chain radicals would also affect Ap. Further studies are required to understand the C L dependence observed in D A polymerization. It goes without saying that termination models other than the power-law expression may be used for fitting experimental S P - P L P traces. E q 7 has been applied primarily because of its simplicity and because of the availability of a theoretically derived power-law expression for the C L dependence of tenriination rate in dilute polymer solution.

The S P - P L P experiments presented in the previous section have been carried out under such conditions. The data presented above thus may be considered as "true" chain-length averaged termination rate coefficients. Investigations by Kuelpmann into several photoinitiators revealed that amethyl-4-(methylmercapto)-a-morpholino-propiophenone (MMMP), see Scheme 2, is a close-to-ideal photoinitiator which rapidly decomposes into two propagating free-radical species (23). The measurements have been carried out within extended ranges of monomer conversion, partly up to 70 %.

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