Hydrazine-functionalized latexes

The noncommercial functional monomer 4-vinylbenzyl hydrazine (VBH) was synthesized and subsequently copolymerized with styrene (St) by means of different batch and semicontinuous seeded emulsion polymerization processes, so as to obtain hydrazine-functionalized nanoparticles. The effect of pH, surfa...

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Bibliographic Details
Published in:Journal of polymer science. Part A, Polymer chemistry Polymer chemistry, 2009-11, Vol.47 (22), p.6201-6213
Main Authors: Costoyas, Álvaro, Ramos, Jose, Forcada, Jacqueline
Format: Article
Language:English
Subjects:
Acetone
Applied sciences
Conversion
Copolymerization
Emulsion polymerization
Exact sciences and technology
functionalization of polymers
Hydrazines
Hydrazones
Initiators
nanoparticles
Organic polymers
Physicochemistry of polymers
Preparation, kinetics, thermodynamics, mechanism and catalysts
Reproduction
Styrenes
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Summary:The noncommercial functional monomer 4-vinylbenzyl hydrazine (VBH) was synthesized and subsequently copolymerized with styrene (St) by means of different batch and semicontinuous seeded emulsion polymerization processes, so as to obtain hydrazine-functionalized nanoparticles. The effect of pH, surfactant and initiator amounts, ratio VBH/St, reaction temperature, and ratio acetone/water were studied. Due to the amphiphilic character of VBH at acid pH, the hydrazine groups of the functionalized comonomer were masked with acetone to form hydrazone groups. Secondary nucleations were avoided by using the protected VBH comonomer; however, a decreased radical efficiency achieving limited conversion was observed. Controlling the cationic initiator concentration, complete conversions together with the neat growth of the seed particles were obtained in the semicontinuous seeded emulsion polymerization of styrene and VBH protected with acetone.
ISSN:0887-624X
1099-0518
1099-0518
DOI:10.1002/pola.23663