Poly butene properties

Properties of Poly butene Sulfone Foam. Many properties of polybutene sulfone foam are similar to those of polystyrene foam. Mechanical properties are a little lower for the same foam density, but the bulk density of polybutene sulfone is 1.37 compared with 1.05 for polystyrene. Figure 6 shows that mechanical properties vary in the same ratio as density The insulating properties of polybutene sulfone foam are very good, somewhat better than polystyrene foam (Figure 7). Polybutene sulfone has a good solvent resistance as shown in Table I. In particular, styrene, benzene, and toluene do not attack polybutene sulfone but attack polystyrene. 

Because of its high tensile strength and stress corrosion resistance, poly-(butene-1) is used for pipes and packaging film. Atactic poly(butene-l) (APB) is mostly produced by direct polymerization. It has similar properties to atactic poly (propylene). Syndiotactic poly (butene-1) is obtained by hydrogenating 1,2-poly (butadiene) however, it has no commercial significance. 

Poly(olefin sulfones), alternating copolymers of sulfur dioxide and an olefin, are another important class of positive resists, which exhibit a very high sensitivity [35] owing to the weak carbon-sulfur bond (see Figure 6.19). Poly(butene-l-sulfone) shows the best properties (o = 1.6 pC/cm at 20 kV) and is commercially available. 

PP/PB and a poly(/-butene-co-ethylene) Processability, impact strength, and optical properties Hwo 1994... 

Rubin, I. D. (1968) Poly ]-Butene)-Its Preparation and Properties, Gordon and Breach Science Publishers, New York. 

RAFF, R. A. V. and DOAK, K. w. (Eds.), Crystalline Olefin Polymers, Interscience, New York (1964) RUBIN, I. D., Poly-1-butene its Preparation and Properties, Macdonald, London (1969)... 

Multilayered materials owe their properties and behavior to the properties of and the interactions between the components (5). Each of the two or more components contributes its particular property to the total performance of the multilayered material. For example, in Pouch 1, Table II, the aluminum foil provides high oxygen and water vapor permeability resistance, poly (ethylene terephthalate) provides structural strength and stiffness, and the ethylene-butene copolymer provides a heat sealable layer. If the components of the multilayered materials interact then the whole would be something different than the sum of its parts. In other words, the properties of the components of the multilayered materials are not independent of one another but rather are interdependent. 

Most commercial polymers are substantially linear. They have a single chain of mers that forms the backbone of the molecule. Side-chains can occur and can have a major affect on physical properties. An elemental analysis of any polyolefin, (e.g., polyethylene, polypropylene, poly(l-butene), etc.) gives the same empirical formula, CH2, and it is only the nature of the side-chains that distinguishes between the polyolefins. Polypropylene has methyl side-chains on every other carbon atom along the backbone. Side-chains at random locations are called branches. Branching and other polymer structures can be deduced using analytical techniques such as NMR. 

PB film, properties of, 20 420t. See also Poly(l- butene) (PB)... 

Poly(l,4-benzamide) (PBA), 13 371 Poly(1-butene) (PB), 4 429. See also Blown PB film Isotactic PB resins Isotactic poly(l- butene) (PB) PB entries Pipe-grade PB resin Syndiotactic poly(1-butene) (PB) mechanical properties of, 20 418 polymerization processes for, 20 424-425 uses of, 20 430-431 commercial manufacture of, 20 429 Poly-1-olefins, regioregular, 26 513 Poly(l,4-butylene terephthalate) (PBT), 10 188... 

Read, C.S.. R. Wilhalm, and Y. Yoslnda SRI Chemical Economics Handbook Linear Alpha Olefins, SRI International, Menlo Park, CA, Oct. 1993 Rubin, IT). Poly (1-Butene) Its Preparation and Properties, Gordon Breach, New York, 1968. 

The superior properties of polypropylene terephthalate) (PPT) polymer and fibers over the chemically analogous poly(ethylene terephthalate) (PET, used for soda bottles) and poly(butylene terephthalate) (PBT) have been well known for several decades PPT fibers are much more elastic and less brittle than PET and offer better recovery from stretching than PBT they are also easier to dye than either PET or PBT. Compared to the intermediate for PET, ethylene glycol, which is available inexpensively from ethylene oxide, and to that for PBT, butanediol, likewise available inexpensively from butene or butadiene, the intermediate for PPT, 1,3 propanediol (1,3-PPD or PDO), was not - and on a large scale is still not - available. Three processes, two chemical ones and one biotechnological, compete to change this situation (Figure 20.10). 

The major producer of isotactic poly(l-butene) (iPB) is Basell, which recently started a 45 kiloton-per-year plant in the Netherlands.878 A smaller producer is Mitsui. The properties and applications of iPB, and the early process for its production have been reviewed 315>879-882i... 

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