The self-condensing vinyl polymerization system consisting of inimers and multifunctional core initiators is studied by the principle of statistical mechanics.
In order to investigate the effect of core initiators on the statistical properties of the system, the number and functionality of core initiators have been explicitly taken into account, and the variations of relevant physical quantities against the conversion of vinyl groups under various conditions are presented.
It is shown that the presence of core initiator results in a significant influence on average properties of the system, which can be explained from the competition between polymers with and those without a core initiator in their growth process.
The objectives of the Sandstone series of tests were to: test nuclear cores and initiators; improve the theory and knowledge of implosion type weapons; test levitated cores; test composite cores; and determine the most economic designs in terms of efficient use of fissionable material.
The nuclear group moved to Los Alamos to study the cores and initiators.
Three days before the day the bomb was to be test detonated in the New Mexico desert, Bacher was part of the pit assembly team, which assembled the nuclear capsule (a cylindrical section of the uranium tamper, containing the plutonium core and initiator) in an old farmhouse near the Alamogordo testing site.
The structure of dendrimers consists of a core of initiator, repeated branching units, terminal functional groups, and void spaces, which are rooms for molecular cargo [ 159].
These polyesters exhibited different thermal behavior from pure PHAs that can be tuned by changing the initiator core, the lactide/glycolide chain length, and diacid dichloride type.
By means of the divergent method, DAP (generation = 0.5∼3.0) were prepared by gradually attaching methyl acrylate and methylene-dianiline to the initiator core.
Emanating from an initiator core, the layer-by-layer expansive growth allows for the synthesis of varying 'generations' of dendrimers with different hydrodynamic sizes, branching points and surface functionality (Fig. 7a) [111].
Dendrimers varying in their initiator core, repeating units, terminal functionality, charge, and solubility profile have been synthesized thus far [136, 137]; have found diversified applications ranging from the paint industry to desalination plants; and have been tested as diagnostic and drug delivery agents [138].
