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Advances in Controlled/Living Radical Polymerization by Krzysztof Matyjaszewski

By Krzysztof Matyjaszewski

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

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Ch003 37 another P \ The GPC chart of the product clearly showed the existence of the 3arm chain produced by the cross-termination as well as the linear chain of doubled chain length produced by the conventional (homo-) termination. The concentration of the 3-arm chain relative to that of the linear chain was proportional to the concentration of the RAFT agent, as the theory demanded. This analysis also indicated that kC is similar to k in magnitude (15). The GPC chart of the 3-arm chain, taken after having been kept at 60°C for 25h, showed no detectable change, indicating that the chain is stable, and the crosstermination is a virtually irreversible process, at least at and below 60°C (15).

ACS Symposium Series; American Chemical Society: Washington, DC, 2003. ch004 50 DMPΑ-derived species results in a rather peculiar S P - P L P behavior: The monomer conversion vs. time traces measured at different initial D M P A contents, but otherwise identical reaction conditions, intersect each other (22). This crossing behavior provides access to measuring the chain-length dependence of the termination rate coefficient, kt(i) (22). Measuring several S P PLP traces under conditions where all reaction conditions except D M P A concentration are identical, however, becomes increasingly difficult toward moderate and high degrees of monomer conversion.

ACS Symposium Series; American Chemical Society: Washington, DC, 2003. ch003 37 another P \ The GPC chart of the product clearly showed the existence of the 3arm chain produced by the cross-termination as well as the linear chain of doubled chain length produced by the conventional (homo-) termination. The concentration of the 3-arm chain relative to that of the linear chain was proportional to the concentration of the RAFT agent, as the theory demanded. This analysis also indicated that kC is similar to k in magnitude (15).

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