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Linear chains

Simple ketones and esters are inert. On the other hand, nitroalkanes react smoothly in r-butyl alcohol as a solvent with butadiene, and their acidic hydrogens are displaced with the octadienyl group. From nitromethane, three products, 64, 65, and 66, are formed, accompanied by 3-substituted 1,7-octadiene as a minor product. Hydrogenation of 65 affords a fatty amine 67 which has a primary amino function at the center of the long linear chain[46,61]. [Pg.433]

One of the mam uses of the linear a olefins prepared by oligomerization of ethylene is in the preparation of linear low density polyethylene Linear low density polyethylene is a copoly mer produced when ethylene is polymerized in the presence of a linear a olefin such as 1 decene [H2C=CH(CH2)7CH3] 1 Decene replaces ethylene at random points in the growing polymer chain Can you deduce how the structure of linear low density polyethylene differs from a linear chain of CH2 units ... [Pg.622]

Poly(tetmfluoroethylene). Poly(tetrafluoroethylene) is prepared from tetrafluoroethy-lene and consists of repeating units in a predominantly linear chain ... [Pg.1016]

Fluorinated Ethylene-Propylene Resin. Polymer molecules of fiuorinated ethylene-propylene consist of predominantly linear chains with this structure ... [Pg.1016]

Poly(vinylidene Fluoride). Poly(vinylidene fluoride) consists of linear chains in which the predominant repeating unit is... [Pg.1016]

Polybutylene. Polybutylene is composed of linear chains having an isotactic arrangement of ethyl side groups along the chain backbone. [Pg.1021]

The chemistry of furfuryl alcohol polymerization has received much attention over the years. Several recent reviews have been written (5,6,54). Based on the accumulated data, furfuryl alcohol has to be considered a bifimctional monomer in the initial stage and its "normal" reactions give linear chains or oligomers containing essentially two repeating units (15,16) with (16) predominating. [Pg.79]

A = acceptor) is a linear chain of parallel stacked TTE molecules. The TTE molecules are registered directiy above one another, with anions residing in sites between the TTE chains. Unlike the situation found for the TCNQ salts, the TTE molecules in these soHds are equally spaced along the chain. Substantial TT-ovedap exists between the TTE molecules in the chain, providing for conduction along the stacking direction (Eig. 4). [Pg.240]

J. H. Pedstein and P. M. Borsenberger, Extended Linear Chain Compounds, Vol. 2, Plenum Press, New York, 1982, Chapt. 8. [Pg.396]

Esters made from the reaction of acids (or anhydrides) with alcohols. 1-Alkanols produce linear chains, hence the L designation in plasticizer names. [Pg.121]

Mliphatic dibasic acids such as succinic acid, adipic acid, azelaic acid, and sebacic acids have also been used to make alkyd resins. Their linear chain stmcture lends higher flexibiUty and lower viscosity to the resin as compared to the rigid aromatic rings of phthaUc acids. [Pg.33]

Properties. Boron carbide has a rhombohedral stmcture consisting of an array of nearly regular icosahedra, each having twelve boron atoms at the vertices and three carbon atoms ia a linear chain outside the icosahedra (3,4,6,7). Thus a descriptive chemical formula would be [12075-36-4]. [Pg.219]

In addition to linear chain extension, excess diisocyanate leads to cross-linking iato a network because the diisocyanate groups can also react with the hydrogen atoms of the —NH— groups ia the chains. Furthermore, the weU-known polyurethane foam mbber can be made by a dding water to the mixture because the isocyanate groups react vigorously with water to Hberate carbon dioxide gas as follows ... [Pg.471]

Thermoplastics are the largest class of engineering polymer. They have linear molecules they are not cross-linked, and for that reason they soften when heated, allowing them to be formed (ways of doing this are described in Chapter 24). Monomers which form linear chains have two active bonds (they are bifunctional). A molecule with only one active bond can act as a chain terminator, but it cannot form a link in a chain. Monomers with three or more active sites (polyfunctional monomers) form networks they are the basis of thermosetting polymers, or resins. [Pg.230]

The simplest linear-chain polymer is polyethylene (Fig. 22.3a). By replacing one H atom of the monomer by a side-group or radical R (sausages on Fig. 22.3b, c, d) we obtain the vinyl group of polymers R = Cl gives polyvinyl chloride R = CIT3 gives... [Pg.230]

Cellulase The enzyme that cuts the linear chain of cellulose, a glucose polymer at 1-4-p-linkages into cellodextrins and glucose. [Pg.901]

Bamboo-shaped tubes. A carbon tube with a peculiar shape looking like bamboo, produced by the arc evaporation of nickel-loaded graphite, is shown in Fig. 8. The tube consists of a linear chain of hollow compartments that are spaced at nearly equal separation from 50 to 100 nm. The outer diameter of the bamboo tubes is about 40 nm, and the length typically several /im. One end of the tube is capped with a needle-shaped nickel particle which is in the normal fee phase, and the other end is empty. Walls of each compartment are made up by about 20 graphitic layers[34]. The shape of each compartment is quite similar to the needle-shape of the Ni particle at the tip, suggesting that the Ni particle was once at the cavities. [Pg.159]

The reversible aggregation of monomers into linear polymers exhibits critical phenomena which can be described by the 0 hmit of the -vector model of magnetism [13,14]. Unlike mean field models, the -vector model allows for fluctuations of the order parameter, the dimension n of which depends on the nature of the polymer system. (For linear chains 0, whereas for ring polymers = 1.) In order to study equilibrium polymers in solutions, one should model the system using the dilute 0 magnet model [14] however, a theoretical solution presently exists only within the mean field approximation (MFA), where it corresponds to the Flory theory of polymer solutions [16]. [Pg.510]

As pointed out by Flory [16], the principle of equal reactivity, according to which the opportunity for reaction (fusion or scission) is independent of the size of the participating polymers, implies an exponential decay of the number of polymers of size / as a function of /. Indeed, at the level of mean-field approximation in the absence of closed rings, one can write the free energy for a system of linear chains [11] as... [Pg.520]


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A Monoatomic Linear Chain

Band Theory. The Linear Chain of Hydrogen Atoms

Bending Coordinates Application to the Linear Chain

Branched chains with linear branching and chain breaking in the bulk

Chain propagation linear

Chain structure linear chains

Chain structures perfect linearity

Clusters linear chains

Cobalt linear chains

Conformational search linear chains

Copper linear chains

Crosslinking linear chains

Derivatives of Linear Chain Geometry

Diatomic linear chain

Dispersive Linear Chain

Dispersive Linear Chain model

Distribution with Linear Chains

Effect of Long-Chain Branching on Linear Viscoelastic Behavior

Example of a chain reaction with both linear branching and breaking in the bulk

Flexible chain linear polymers

Formation of Linear Main Chains

High molecular weight, linear chains

Hypernetted-chain approximation linearized

Iridium, linear chain

Linear Conjugated Chains

Linear aliphatic chains, motion

Linear chain attachment

Linear chain attachment polymer

Linear chain concentration regime

Linear chain conducting systems

Linear chain copolymers

Linear chain elongation

Linear chain macromolecules

Linear chain model

Linear chain of atoms

Linear chain reactions

Linear chain structures

Linear chain, of reaction

Linear chains and inversion symmetry

Linear chains electropolymerization

Linear chains, adsorption

Linear chains, growth

Linear metal chain compounds

Linear metal chain compounds copper

Linear metal chain compounds nickel

Linear or Chain Polymers

Linear polyene chain

Linear polymer chains

Linear polymers as freely jointed chains

Linear polymers, chain conformation

Linear polynucleotide chains

Linear rigid-chain polymers

Linear single polynucleotide chain

Linear supply chain

Linear, Taper-Shaped, and Dendritic Molecules with RF-Chains

Linear, nonideal polymer chains

Linear-chain complexes

Linear-chain oils

Networks from Aromatic Linear Chains Created by Reacting Backbone Diacetylene or Pendant Acetylene Groups

Nickel linear chains

Normal Modes in a Linear Chain of Atoms

Normal process linear chain

Platinum linear-chain complexes

Poly unperturbed dimensions of linear chains

Polymer chain, single linear

Polymer chemistry linear chains

Polymers linear/chain structure

RVB Ansatze for the Linear Chain

Rhodium, linear chain

Search Linear Chains

Shell Model of the Linear Monoatomic Chain

Side-chain branching linear polyethylenes

Simultaneous cross-linking and main-chain cleavage of linear polymers

Structure of linear polyelectrolyte chains in dilute solution

The Linear Polyene Chain

Thermal expansion linear chains

Transition-metal-based linear chain

Transition-metal-based linear chain compounds

Unperturbed dimensions, linear chain

Unperturbed dimensions, linear chain poly . VII

Zero-point energy linear chain

Zigzag chains linear chain compounds

Zigzag chains linear polymers

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