P-containing polymers

The molecular weights of most synthetic P-containing polymers are adjustable to cover a range of values, by choice of experimental conditions (Figure 12.29). This can be compared with the broad ranges of molecular weight found among bioassemblies (Table 12.43). 

The following methods are usually used for the synthesis of P-containing polymers ... 

In this chapter, mainly the ROP of cyclic P-containing monomers is discussed. The synthesis of P-containing polymers by the polyaddition is discussed only for the reaction of phosphoric acid derivatives with diepoxides. 

The ideas in a) and b) were used by D. H. Lewis and P. R. Ryason to describe flows of gas-containing polymer melts [64]. They considered gas insoluble in the melt. The effects of gas solubility are summed up in [20, 21]. 

Sharkey, W. H. Polymerizations Through the Carbon-Sulphur Double Bond. VoL 17, pp. 73-103. Shimidzu, T. Cooperative Actions in the Nucleophile-Containing Polymers. Vol. 23, pp. 55-102. Slichter, W. P. The Study of High Polymers by Nuclear Magnetic Resonance. VoL 1, pp. 35-74. Small, P. A. Long-Chain Branching in Polymers. VoL 18,pp. 1-64. 

Let w be the mass, in grams, of polymer P containing 1 gram of carbon and deduce the relation between per cent chlorine and the x-ray absorption. Now... 

The hydrosi(ly)lations of alkenes and alkynes are very important catalytic processes for the synthesis of alkyl- and alkenyl-silanes, respectively, which can be further transformed into aldehydes, ketones or alcohols by estabhshed stoichiometric organic transformations, or used as nucleophiles in cross-coupling reactions. Hydrosilylation is also used for the derivatisation of Si containing polymers. The drawbacks of the most widespread hydrosilylation catalysts [the Speier s system, H PtCl/PrOH, and Karstedt s complex [Pt2(divinyl-disiloxane)3] include the formation of side-products, in addition to the desired anh-Markovnikov Si-H addition product. In the hydrosilylation of alkynes, formation of di-silanes (by competing further reaction of the product alkenyl-silane) and of geometrical isomers (a-isomer from the Markovnikov addition and Z-p and -P from the anh-Markovnikov addition. Scheme 2.6) are also possible. 

Kaplan studied the X-ray radiolysis of p>oly(a)-chloroolefin sulfone)s and found that the chlorine-containing polymers are less sensitive to radiation than the non-chlorine containing species. He found that dehydrochlorination is a significant reaction in the radiolysis of poly(a>-chloroolefin sulfone)s, but it is not a necessary one in order to lose SO,. 

Eisenberg, A. King, M. In Ion-Containing Polymers Physical Properties and Structures Academic New York, 1977 Vol. 2, p 169. 

The IR spectra of the polymer (P) contained two sharp absorptions near 1000 and 1100 cm-- -, indicative of the presence of unsubstituted cyclopentadienyl rings in the products. The 250-MHz - -H-NMR spectrum, shown in Figure 3, contained the expected peaks for the methyl, methylene, and cyclopentadienyl protons, respectively, at 61.52, 1.57 and 4.04 ppm. No olefinic proton resonances were present, and all of the samples of the polymer in Table II exhibited the same - -H-NMR spectrum. 

Allcock, H. R. et al., Macromolecules, 1974, 7, 284-290 Sealed tubes containing the linear P=N polymer exploded after heating at 300°C for 24-30 h (or after shorter times at higher temperatures), owing to pressure build-up from formation of the more volatile cyclic tri- and tetra-mers. 

J.V. Grazulevicius, P. Strohriegl, J. Pielichowski, and K. Pielichowski, Carbazole-containing polymers synthesis, properties and applications, Prog. Polym. Sci., 29 1297-1353, 2003. 

H. Quante, P. Schlichting, U. Rohl, Y. Geerts, and K. Mullen, Novel perylene-containing polymers, Macromol. Chem. Phys., 197 4029-4044, 1996. 

C. Wang, M. Kilitziraki, J.A.H. MacBride, M.R. Bryce, L.E. Horsburgh, A.K. Sheridan, A.P. Monkman, and I.D.W. Samuel, Tuning the optoelectronic properties of pyridine-containing polymers for light-emitting devices, Adv. Mater., 12 217-222, 2000. 

Corriu, R. J. P. Douglas, W. E. Organosilicate Oligomers and Nanostructured Materials. In Silicon-Containing Polymers. The Science and Technology of Their Synthesis and Applications-, Jones, R. G., Ando, W., Chojnowski, J., Eds. Kluwer Dordrecht, 2000 Chapter 25, pp 667-695. 

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