POLYFENCE

LPPP ladder type soluble polyf/xiru-phcnylcnc)... 

Herbert and Hay reported a bisphenolic monomer, 3,8-bis(4-hydroxyphenyl)-A-phenyl-1,2-naphthalimide (Table 6.1), as well as its corresponding polyf V-phenyl imido aryl ether sulfone) via transimidization reactions with hydrazine monohydrate, aliphatic amines, and an amino acid.193 These polysulfones with... 

Figure 27 Cyclic voltammogram recorded in a CH2CI2 solution of polyf tert-butyl-ferrocenyl) persulfide...

DNA Bending Assume that a polyf A) tract five base pairs long produces a 2CP bend in a DNA strand. Calculate... 

Poly (vinyl chloride). PVC is a hard, brittle polymer that is self-extinguishing. In order to make PVC useful and more pliable, plaslict/ers I qv) are added. More often than not the plasticizers are flammable and make Ihe formulation less flame-resistant. The Maine resistance of the polyf vinyl chloride) can he increased by ihe addition of an inorganic llamc-rctardunl synergist, e.g., antimony oxide, mixed metal antimony synergists, zinc borate, molybdenum oxide, zinc stannates. and alumina trihydrale. 

Figure 5. GPC curves of 1, cellulose nitrate 2, polyf methyl methacrylate) 3, physical mixture of cellulose nitrate and polyf methyl methacrylate) and 4, graft copolymer of cellulose nitrate-g-poly-(methyl methacrylate). (Reprinted, with permission, from Ref. 21. 

This article surveys the research work on the synthesis and modification reactions of poly(ethyleneimine) as well as its applications to metal complexation processes. Poly-(ethyleneimine), one of the most simple heterochain polymers exists in the form of two different chemical structures one of them is branched, which is a commercially available and the other one linear which is synthesized by cationic polymerization of oxazoline monomers and subsequent hydrolysis of polyf(/V acylimino)cthylcne]. The most salient feature of poly(ethyleneimine) is the simultaneous presence of primary, secondary, and tertiary amino groups in the polymer chain which explains its basic properties and gives access to various modification reactions. A great number of synthetic routes to branched and linear poly(ethyleneimine)s and polymer-analogous reactions are described. In addition, the complexation of polyfethyleneimine) and its derivatives with metal ions is investigated. Homogeneous and heterogeneous metal separation and enrichment processes are reviewed. 

Similarly obtained was polyf 1,4-phenylenedimethylene tellurium) (x = 90)2in 83% yield1. When heated in dimethylformamide at 110-120° sodium telluride and 1,4-diiodobenzene gave poly(phenylene tellurium) (m.p. 162-170°) in 70% yield4. 

Weber R, Hagenmaier H (1994), Chemosphere 30 629-639. Polyf uorinated dibenzodioxins/ furans - Synthesis, analysis, formation and toxicology"... 

Fig. 14. Extinction aiigle as a function of shear rate for liquid crystalline solutions of polyf-y-ethylgbitamatels. The numbers near the lines represent the polymer concentration in vol%. Lines, same as in F 13...

Fig. 8. Dependences of oxygen permeability and selectivity on the alkyl group of polyf 1 -(alkyldimethylsilyl)-1 -propy ne] (membrane thickness 30 pm, 25 °C)...

Fig. 16. Infiaied spectra of polyf-y-benzyl glutamate) formed in p merization of S T%HCA by hexyl-amine in dimethylformamide (48). Number of samples corresponds to that in Table 10...

---