Polyfvinyl chloride structure

Draw a line-bond structure for vinyl chloride, C2H3CI, the starting material from which PVC [polyfvinyl chloride)) plastic is made. 

In addition, the surface should be free of contaminating particles and occlusions that would interfere with the information retrieval process. A typical ablative-mode optical disk has the structure shown in Figme 16.14. The substrate is an optically transparent material such as polycarbonate, PMMA, polyfethylene terephthalate), or polyfvinyl chloride) topped by a subbing layer to provide an optically smooth surface for the recording layer. A metal reflector (typically aluminum) is then incorporated next to a transparent dielectric medium such as poly(a-methyl styrene) and, finally, the absorbing layer where the information pits are created is added. The latter can be a metal-polymer composite (silver particles in a gel) or a dye molecule dispersed in a polymer matrix such as squaryllium dyes, which act as infrared absorbers for GaAs lasers, typically... 

Fig. 4.18 The crystal structure of syndiotactic polyfvinyl chloride). The unit cell contains two chains. For clarity the hydrogen atoms are not shown.

The Structural Model of Nanocomposites PolyfVinyl Chloride)/Organoclay... 

Polsoirea, 99 Polsoirethane, 99 Poly(vinyl acetate), 199, 200 Poly(vinyl alcohol) (PVA), 9,20,94-5, 108, 110, 200, 202, 204, 258-9 analysis of dynamics, 261-2 aqueous system, 58 C CP/MAS NMR spectrum, 259-61 crosslink structure, 259-61 Poly(vinyl alcohol) (PVA)/sodium borate, self-correlation function, 205 Polyfvinyl alcohol) (PVA)-water gel, 57 Polyfvinyl chloride) (PVC), 109, 324 Poly(vinyl methylether) (PVME), 108, 245 Porod law, 212 Porod region, 196 Proportionality equations, 127 Protein gels, 288-90 Proteins, 282... 

The first completely synthetic plastic, phenol-formaldehyde, was introduced by L. H. Baekeland in 1909, nearly four decades after J. W. Hyatt had developed a semisynthetic plastic—cellulose nitrate. Both Hyatt and Baekeland invented their plastics by trial and error. Thus the step from the idea of macromolecules to the reality of producing them at will was still not made. It had to wait till the pioneering work of Hermann Staudinger, who, in 1924, proposed linear molecular structures for polystyrene and natural rubber. His work brought recognition to the fact that the macromolecules really are hnear polymers. After this it did not take long for other materials to arrive. In 1927 polyfvinyl chloride) (PVC) and cellulose acetate were developed, and 1929 saw the introduction of urea-formaldehyde (UF) resins. 

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