Chain-growth and step-growth polymerizations are the two main mechanisms that classically used to synthesize polymers. In this article, a third approach is usually not listed in polymer textbooks described, namely multistep growth “polymerization.” This synthetic strategy does proceed one pot as aforementioned ones but relies on series of distinct chemical reactions. It includes different types...

Ring-Opening Polymerization-Induced Self-Assembly (ROPISA) of N -carboxyanhydride is an efficient one-step process to obtain nanomaterials made polypeptides.

We present a novel generating function (GF) method for the self-condensing vinyl polymerization (SCVP) system with any initial distribution of preexisted polymers. Such was proven to be especially useful investigate semi-batch SCVP allowing sequence feeding operations during polymerization. Consequently, number-, weight-, and z-average molecular weights as well dispersity index hyperbranched po...

Polymerization-induced formation of amphiphilic diblock copolymer vesicles is performed in water at high concentrations by a single-step nitroxide-mediated controlled free-radical emulsion polymerization of 4-vinylpyridine, initiated by a water-soluble poly(sodium acrylate) macroalkoxyamine at alkaline pH.

In this paper, we show a general way to interpret the infrastructure of a global field of arbitrary unit rank. This interpretation generalizes the prior concepts of the giant-step operation and f -representations, and makes it possible to relate the infrastructure to the (Arakelov) divisor class group of the global field. In the case of global function fields, we present results that establish ...

Kennedy et al. have introduced mixtures of monoor polyfunctional aralkyl chlorides with BCl, as initiating systems for the polymerization of isobutene'). This so-called inifer technique has been demonstrated to be a valuable method for the production of telechelic polymers2). The mechanism of initiation, which has been suggested for these polymerizations'*2), is in full agreement with the resul...

The polymerization of laminin into a cell-associated network--a key step in basement membrane assembly--is mediated by the laminin amino-terminal (LN) domains at the tips of the three short arms of the laminin αβγ-heterotrimer. The crystal structure of a laminin α5LN-LE1-2 fragment shows that the LN domain is a β-jelly roll with several elaborate insertions that is attached like a flower head t...

We discuss the nonabelian world-volume action which governs the dynamics of N coincident Dp-branes. In this theory, the branes’ transverse displacements are described by matrix-valued scalar fields, and so this is a natural physical framework for the appearance of noncommutative geometry. One example is the dielectric effect by which Dp-branes may be polarized into a noncommutative geometry by ...

Polystyrene-silica core-shell nanocomposite particles are successfully prepared via one-step Pickering emulsion polymerization. Possible mechanisms of Pickering emulsion polymerization are addressed in the synthesis of polystyrene-silica nanocomposite particles using 2,2-azobis(2-methyl-N-(2-hydroxyethyl)propionamide (VA-086) and potassium persulfate (KPS) as the initiator. Motivated by potenti...