Poly(vinyl alcohol) star polymers prepared via MADIX/RAFT polymerisationElectronic Supplementary Information (ESI) available: synthesis and NMR data of MADIX agents, polymerisation and analysis technique. See http://www.rsc.org/suppdata/cc/b4/b404763j/
作者:Martina H. Stenzel、Thomas P. Davis、Christopher Barner-Kowollik
DOI:10.1039/b404763j
日期:——
Poly(vinylacetate) stars were prepared using MADIX/RAFT polymerisation mediated by xanthates. The polymerisation shows living characteristics with molecular weight increasing with conversion. The subsequent hydrolysis of these three and four arm stars led to the formation of poly(vinyl alcohol) stars.
Ultra-fast microwave enhanced reversible addition-fragmentation chain transfer (RAFT) polymerization: monomers to polymers in minutes
作者:Steven L. Brown、Christopher M. Rayner、Susan Graham、Andrew Cooper、Steven Rannard、S?bastien Perrier
DOI:10.1039/b703386a
日期:——
Microwave mediated RAFT polymerization leads to ultra-fast polymerizations, whilst keeping excellent control over molecular weights and molecular weight distributions; this is the first example of such a dramatic effect of microwaves on living radical polymerization kinetics, and it shows the potential for chemists to produce very well controlled polymers in a matter of minutes.
synthesized with high degree of purity. These xanthates were used as chain transfer agents (CTA) in the RAFT/MADIX polymerization of vinylacetate (VAc) to prepare end‐capped poly(VAc). The rate of VAc polymerization in the presence of these new CTAs was shown to be similar to that obtained with conventional xanthate, that is, (methyl ethoxycarbonothioyl) sulfanyl acetate. Good control of VAc polymerization
作者:Jukka Niskanen、Mikko Karesoja、Vladimir Aseyev、Xing-Ping Qiu、Françoise M. Winnik、Heikki Tenhu
DOI:10.1002/pola.27794
日期:2016.2.1
temperature measured by transmittance was 50–51 °C in water. The calorimetrically observed phase transition temperature of PVCL in the conjugate increased by 2 °C to 47.7 °C, whereas the enthalpy of the phase transition was unaffected by the conjugation. HA‐PVCL conjugate self‐assembles in water upon heating into monodisperse, colloidally stable, hollow spherical particles whose size may be tuned with
Synthesis of functionalized poly(vinyl acetate) mediated by alkyne-terminated RAFT agents
作者:Joana. R. Góis、Anatoliy V. Popov、Tamaz Guliashvili、Arménio C. Serra、Jorge F. J. Coelho
DOI:10.1039/c5ra15580k
日期:——
Two new xanthates with alkyne functionalities were synthesized for the reversible addition fragmentation chain transfer (RAFT) polymerization of vinyl acetate (VAc).