Propene physical properties

In Section 6.21 we listed three main methods for polymerizing alkenes cationic, free-radical, and coordination polymerization. In Section 7.15 we extended our knowledge of polymers to their stereochemical aspects by noting that although free-radical polymerization of propene gives atactic polypropylene, coordination polymerization produces a stereoregulai polymer with superior physical properties. Because the catalysts responsible for coordination polymerization ar e organometallic compounds, we aie now in a position to examine coordination polymerization in more detail, especially with respect to how the catalyst works. 

Homology modeling, 20 837 Homomenthyl salicylate, 22 16 physical properties of, 22 14t Homonuclear Hartmann-Hahn spectroscopy, 20 137 Homopolymerization, 10 183 of a-olelins, 16 110 ethene, 16 102-103 propene, 16 104-110 of VDC, 25 695-697 Homopolymers... 

Propen-l-ol. See Allyl alcohol 2-Propenal. See Acrolein 2-Propenamide. See Acrylamide Propene, copolymerizations of, 16 111 Propene homopolymerization, 16 104-110 Propene polymerization, 16 94, 99 2-Propenenitrile. See Acrylonitrile (AN) Propenoic acid, physical properties, 5 31t Propenoic acid nitrile. See Acrylonitrile (AN)... 

When polymerization occurs in a mixture of monomers there will be competition between the different kinds of monomers to add to the growing chain and produce a copolymer. Such a polymer will be expected to have physical properties quite different from those of a mixture of the separate homopolymers. Many copolymers, such as GRS, ethene-propene, Viton rubbers, and Vinyon plastics are of considerable commercial importance. 

Exercise 29-26 What physical properties would you expect for a 2-methy propene-butenedioic anhydride copolymer (Review Section 29-3.)... 

Poly(l,4-pentadiene-alt-MA), 343, 348, 586 Poly(phenanthrene-alt-MA), 376, 660 Poly(phenylacetylene), MA grafted, 471 Poly(phenylacetylene-co-MA), 335, 660 Poly(2-phenylallyl alcohol-alt-MA), 331, 660 Poly(4-phenyl-l-butene-alt-MA), 340, 341 Poly(/- 1-phenylethyl methacrylate-co-MA), optically active polymer, 383 Poly(/-1-phenylethyl vinyl ether-alt-MA), optically active polymer, 383 Poly(5-phenyl-l-pentene-alt-MA), 340, 341 Poly( l-phenyl-4-pentene- 1-one-alt-MA), 314 Poly(3-phenyl propene-l-alt-MA), 341 Poly(o-phenylstyrene-alt-MA), 373 Poly(2-phenylvinyl alkyl ethers-alt-MA), 318 Poly(2-phenylvinyl alkyl thioethers-alt-MA), 318 Poly(phenyl vinyl ether-alt-MA), 318, 394 Poly(phenyl-o-vinyl formal-alt-MA), 328 Poly(phenyl vinyl ketone-co-MA), physical properties, 290... 

To date, polyolefins - spedfically polyethene (PE) and poly-propene (PP) - are the most important commerdal polymers. Due to the combination of their excellent chemical and physical properties and their low production costs, these materials find extremely broad application. Since the discovery of a coordinative insertion polymerization by Ziegler in 1953,... 

Addition polymerization of some alkenes generates stereogenic centers along the entire backbone of the polymer. The relationship of these centers to one another affects the physical properties of the polymer. Consider the polymer formed from propene. If the methyl groups are all on the same... 

The component distribution data of liquefied petroleum gases and propene concentrates can be used to calculate physical properties such as relative density, vapor pressure, and motor octane (see Practice D 2598). Precision and accuracy of compositional data are extremely important when these data are used to calculate various properties of these petroleum products. 

With chain-substituted polymers, the relative stereochemical orientation of the side chains can profoundly influence the physical properties of the polymer. If we consider the simplest example polypropylene (the old name for propene was propylene), one stereochemical outcome might be that all the methyl groups are oriented in the same way, as in 21.5, isotactic polypropylene. These stereochemical relationships result in a helical chain conformation for isotactic polypropylene. 

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