00657nas a2200157   4500008004100000022001400041245010400055210006900159260007200228300001400300490000700314100001500321700001600336700001700352856013000369       2006                        eng d  a0024-929700aUnfavorable coordination of copper with methyl vinyl ketone in atom transfer radical polymerization0 aUnfavorable coordination of copper with methyl vinyl ketone in a  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcAUG   a5555-55580 v391 aMittal, A.1 aSivaram, S.1 aBaskaran, D.  uhttps://library.ncl.res.in/content/unfavorable-coordination-copper-methyl-vinyl-ketone-atom-transfer-radical-polymerization-001758nas a2200181   4500008004100000022001400041245011200055210006900167260007100236300001400307490000700321520103800328100002001366700001701386700002701403700002001430856012601450       2006                        eng d  a0024-929700aWell-defined poly(4-vinylbenzocyclobutene): synthesis by living anionic polymerization and characterization0 aWelldefined poly4vinylbenzocyclobutene synthesis by living anion  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcMAY  a3525-35300 v393 a<p>Living anionic polymerization of 4-vinylbenzocylobutene was performed in benzene at room temperature using sec-butyllithium as the initiator. Results of the kinetic studies indicated the termination- and transfer-free nature of the polymerization. Homopolymers with predictable molecular weights and narrow molecular weight distributions were produced, excluding the interference of the cyclobutene rings during initiation and propagation. Thermogravimetric analysis of poly( 4-vinylbenzocyclobutene) in air showed a small weight gain at similar to 200 degrees C, a rapid decomposition at similar to 455 degrees C, and a gradual decomposition at similar to 566 degrees C. This behavior was attributed to the formation of radicals from the pendent benzocyclobutene functionality through o-quinodimethane intermediates and simultaneous decomposition/ cross-linking reactions at high temperature. The living nature of the polymerization was also examined via sequential copolymerization with butadiene to form diblock copolymers.</p>1 aSakellariou, G.1 aBaskaran, D.1 aHadjichristidis, Nikos1 aMays, Jimmy, W.  uhttps://library.ncl.res.in/content/well-defined-poly4-vinylbenzocyclobutene-synthesis-living-anionic-polymerization-and-002014nas a2200181   4500008004100000022001400041245011800055210006900173260007100242300001400313490000700327520130200334100001801636700001801654700001601672700001701688856012701705       2012                        eng d  a0024-929700aReactive polymers bearing styrene pendants through selective anionic polymerization of 4-vinylbenzyl methacrylate0 aReactive polymers bearing styrene pendants through selective ani  a1155 16TH ST, NW, WASHINGTON, DC 20036 USAbAMER CHEMICAL SOCcAPR  a3387-33930 v453 a<p>Selective anionic polymerization of 4-vinylbenzyl methacrylate at methacrylate site has been achieved using resonance stabilized anionic initiators such as 1,1-diphenylhexyllithium (DPHLi) and tritylpotassium (TritylK) in tetrahydrofuran (THF) at -78 degrees C. Polymerization proceeded selectively through methacrylate functionality of the monomer in a controlled manner and produced polymers and copolymers with narrow molecular weight distribution at low temperatures (&lt;=-40 degrees C). H-1 NMR of the polymer showed the presence of styrene pendants in every monomeric repeating unit. The polymerization results confirm that the resonance stabilized carbanions with an optimum pK(a) (30 &lt;= pK(a) &lt;= 32) of their conjugate acids such as DPHLi and TritylK do not react with styrene functionality at 78 degrees C. The selective initiation without cross-linking is attributed to the differences in the electronegativity between polar methacrylate and styrene functionalities and an attenuation of initiator reactivity at low temperature. Poly(4-vinylbenzyl methacrylate) and its copolymers with the vinyl pendant in close proximity with ester linkage are very reactive and unstable, readily undergoing cross-linking in solution or in solid state with or without a radical initiator.</p>1 aMohan, Murali1 aRaghunadh, V.1 aSivaram, S.1 aBaskaran, D.  uhttps://library.ncl.res.in/content/reactive-polymers-bearing-styrene-pendants-through-selective-anionic-polymerization-4-0