Homopolymer self-similarity

After publication of our work,22 new self-assembled Zn(II) terpyridine polymers were prepared and used in PLEDs. Following the methodology reported by us, Lin et al. similarly prepared a series metallopolymers by self-assembled reaction containing Zn(II) terpyridine units, including a metallo-homopolymer and metallo-u/t-copolymer containing carbazole pendants attached to the C-9 position of fluorene by long alkyl spacers.27... 

Fig. 20.10. Base pairs found in homopolymer nucleic add self-complexes. The unsymmetrical uridine U-U and 2-thiouridine s2U-s2U base pairs lead to antiparaUel orientation of polynucleotide chains similar to the RNA double helix. In the symmetrical AH+ -AH+ and C-CH+ base pairs, the dyad axis coinddes with the helix axis and gives rise to parallel polynucleotide chains. For the same reason, the four polynucleotide chains in [poly(G)]4 are related by a fourfold rotation axis and are also parallel

Mixtures of two homopolymers (A and B) and their corresponding diblock copolymer (A-B) are polymeric counterparts of mixtures of water, oil and surfactant. The immiscible nature between water and oil is also observed in polymer blends due to the fact that most polymers are immiscible in each other. The addition of diblock copolymers into blends of homopolymers has effects similar to adding surfactants into water-oil mixtures. The resulting reduction in interfacial tension and formation of the preferred interfacial curvature yield a variety of self-assembled structures. 

Apart from chemical synthesis, electrochemical synthesis is a versatile method for the preparation of self-doped sulfonated polyaniline in both soluble forms and thin films deposited on an electrode surface. Electropolymerization of sulfonated polyaniline homopolymers and copolymers has been carried out in aqueous and nonaqueous media. Similar to chemical synthesis, electrochemically controlled electrophilic and nucleophilic substitution reactions are also reported. 

Chan et al. [188] first prepared the homopolymer of anthranilic acid and its copolymer with aniline by chemical polymerization in order to improve the solubility of polyaniline, to study the self-doping mechanism, and to evaluate thermal properties. The chemical polymerization of anthranilic acid was carried out using ammonium persulfate as the oxidant in the presence and absence of 1 M HCl. Copolymers of anthranilic acid and aniline were prepared in a similar manner by varying the monomer feed ratios in HCl at a pH of about 0.1. The... 

Similarly to previous processes combining PP fibres with PP-based copolymers in a film form to create a self-reinforced composite based on the difference in melting temperatures between homopolymers and copolymers of PP [66], Barany... 

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