Studies in Cathodic Electrodeposition

Particle Size and Monomer Partitioning in Microemulsion Polymerization. 2. Online Small Angle Neutron Scattering Studies

“…Recent SANS studies [16][17][18] on dilute (5 wt %), emulsion polymerized polystyrene latexes suggest a particle morphology consisting of a polymer core and a monomerrich shell, [19][20][21][22][23] where the thickness of the monomer-rich shell increases with the ratio of the radius of gyration of the polymer to the particle diameter. This core-shell morphology has been rationalized by the extreme hy- drophobicity of the polymer that leads to a reduction in the number of accessible chain conformations inside the confined spherical geometry, i.e., a "repulsive-wall" effect.…”

Polyterephthaloylenes: the electrochemical polymerisation of terephthaloyl halides

“…The 1,4-derivatives may be electrochemically converted, in good yields, into poly-p-xylylenes (2, Parylene) ; similar methods, involving other than halide leaving groups, have received commercial attention. 2 The probable mechanistic route is given in Scheme 1 and is supported by experiments,3 which trap the proposed quinodimethanes and in which paracyclophanes are formed. Terephthaloyl halides should similarly cleave reductively to give intermediates which may be represented as 3 or 4 and which should polymerise to linear polymers of the type 5 .…”

Effect of Surfactant Structure on the Electrodeposition of Cationic Latexes

“…A study of reduction processes was a natural choice since we were dealing with cathodic electrodeposition; but the motivation to look at this aspect was generated by earlier work with benzylic sulfonium salts on mer cury cathodes (6,7).…”

“…Alkylating Agent Nucleophile Surfactant (8) The reactions are 2nd order and are accelerated by H20. Therefore, reacting with an excess of nucleophile in aqueous media will produce good yields of the surfac tant.…”