Addition polymers polymers

Addition polymer Polymer produced by a monomer, usually a derivative of ethylene, adding to itself no other product is formed, 611-614,631q Addition reactions, 602 ADP (adenosine diphosphate), 469 Air... 

To avoid the obviously incorrect classification of polyurethanes as well as of some other polymers as addition polymers, polymers have also been classified from a consideration of the chemical structure of the groups present in the polymer chains. Condensation polymers have been defined as those polymers whose repeating units are joined together by functional... 

Addition polymers Polymers made from monomers (usually containing carbon-carbon double bonds) joined directly with one another Condensation polymers Polymers made from monomers (each with two functional groups) that combine so that small molecules are split out between their functional groups... 

Addition polymers Polymers made from monomers (usually containing carbon-carbon double bonds) joined directly with one another... 

Polymers Polymers are long, chainlike molecules composed of repeating units called monomers. Polymers that are formed from monomers that attach together without eliminating any atoms or groups of atoms are called addition polymers. Polymers that eliminate water or other atoms during the polymerization process are called condensation polymers. Copolymers are composed of two different kinds of monomers. 

Palmer et al. [95] analyzed the potential additional polymer-polymer interactions, which may be due to the presence of the PEO potentially interacting with NaCMC, by... 

Several studies have demonstrated the successful incoriDoration of [60]fullerene into polymeric stmctures by following two general concepts (i) in-chain addition, so called pearl necklace type polymers or (ii) on-chain addition pendant polymers. Pendant copolymers emerge predominantly from the controlled mono- and multiple functionalization of the fullerene core with different amine-, azide-, ethylene propylene terjDolymer, polystyrene, poly(oxyethylene) and poly(oxypropylene) precursors [63,64,65,66,62 and 66]. On the other hand, (-CggPd-) polymers of the pearl necklace type were fonned via the periodic linkage of [60]fullerene and Pd monomer units after their initial reaction with thep-xy y ene diradical [69,70 and 71]. 

Much later, experiments on model colloids revealed tliat tire addition of polymer may eitlier induce a gas-liquid type phase separation or a fluid-solid transition [94, 95, 96 and 97]. Using perturbation tlieories, tliese observations could be accounted for quite well [97, 98]. 

Polymers can be classified as addition polymers and condensation polymers. Addition polymers are formed by iiitermolecular reactions of the monomeric units without the elimination of atoms or groups. An example is vinyl chloride, which can be made to combine with itself to yield polyvinyl chloride ... 

These two categories of polymer can be developed along several lines. For example, in addition-type polymers the following applies ... 

Table 1.1 Reactions by Which Several Important Addition Polymers are Produced ...

Condensation polymers such as polyesters and polyamides are especially well suited to this method of molecular weight determination. For one thing, the molecular weight of these polymers is usually less than for addition polymers. Even more pertinent to the method is the fact that the chain ends in these molecules consist of unreacted functional groups. Using polyamides as an example, we can readily account for the following possibilities ... 

The proviso all other things being equal in discussing the last point clearly applies to temperature as well, since the kinetic constants are highly sensitive to temperature. To evaluate the effect of temperature variation on the molecular weight of an addition polymer, we follow the same sort of logic as was used in Example 6.3 ... 

Only one additional stipulation needs to be made before adapting the results that follow from Eq. (5.24) to addition polymers. The mode of termination must be specified to occur by disproportionation to use the results of Sec. 5.4 in this chapter, since termination by combination obviously changes the particle size distribution. We shall return to the case of termination by combination presently. 

Smith, D. A. (Ed.), Addition Polymers Formation and Characterization, Plenum Press, New York, 1968. 

Polymer additives Polymer alloys Polymer analysis... 

Fig. 5. Chemistry of cyclized mbbei—bis-a2ide negative acting resist, (a) Preparation of cyclized mbber resin from polyisoprene (b) photochemistry of aromatic bis-a2ide sensiti2ers. The primary photoproduct is a highly reactive nitrene which may combine with molecular oxygen to form oxygenated products, or may react with the resin matrix by addition or insertion to form polymer—polymer linkages.

The most important reactions of acrylamide are those that produce vinyl addition polymers (see Acrylamide polymers). The initiation and... 

Poly(viaylidene fluoride) [24937-79-9] is the addition polymer of 1,1-difluoroethene [73-38-7], commonly known as vinylidene fluoride and abbreviated VDF or VF2. The formula of the repeat unit in the polymer is —CH2—CF2—. The preferred acronym for the polymer is PVDF, but the abbreviation PVF2 is also frequently used. The history and development of poly(vinyhdene fluoride) technology has been reviewed (1 3). 

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