Polycondensation Methods

Aromatic PODs containing amide and imide groups have been synthesized by the solution polycondensation method (52). 

Polyphosphonates are well-known flame-retardant materials [110] and are generally prepared by melt [111,112], interfacial [113-115] and solution polycondensation methods [116]. A typical example of synthesis is the polycondensation of bifunctional organophosphorus compounds, such as dichlorophenylphosphine oxide, with bisphenols [117,118]. 

Baneijee et al. reported a number of soluble poly-imido [134], polyazomethine [135], and polyazoxy phos-phonates [136] by the two phase polycondensation method with or without any phase transfer catalyst. Resulting polymers exhibit high thermal stability and fire retardancy. 

The first polyimine was reported by Adams and coworkers [182] from terephthalaldehyde and benzidine and dianisidine. Between 1950 and 1959 Marval and coworkers [174-176] reported a number of polyimines. Suematsu and coworkers [170] reported the first successful synthesis of high molecular weight fully aromatic polyimines by solution polycondensation method using w-cresol as reaction medium. 

Poly(para-phenylenevinylene)s (PPVs) represent one of the most intensively investigated classes of rr-conjugated materials. Many synthetic procedures to generate unsubstituted and substituted PPVs have been developed. They include 1,6-polymerizations of 1,4-xylylene intermediates as well as several polycondensation methods. Parallel to the polymer syntheses, several series of PPV oligomers (OPVs) have been synthesized and characterized. Such model oligomers of different molecular size allow for a study of the dependence of electronic and optical properties on the length of the conjugated Ti-system. 

In analogy to poly(arylene ether sulfone)s, there are two different polycondensation methods for the technical synthesis of poly(arylene ether ke-tone)s ... 

The synthetic chemistry of polyamides is briefly reviewed and illustrated with a laboratory experiment showing the interfacial polycondensation method. 

The chemical polycondensation method has as yet been elaborated only for polymers with 1,2-trans-glycosidic linkages between the repeating units, but within these limits it seems to be a rather broad chemical method. It is the first purely chemical method for the synthesis of complex polysaccharides, as was demonstrated before for polypeptides and polynucleotides. ... 

Sokolov, L. B., "Fundamentals of the Synthesis of Polymers by Polycondensation Method". Khimia, Moscow (1979). 

The arrangement of metal atoms at appropriate distances in the polymer backbone (type C) is achieved by the application of either the polymerization method or a combination of monomers. In the backbone of Pt-D1 and Pt-D2 polymers, for example, platinum atoms are regularly arranged at intervals of approximately 7.7 A and 12.1 A, respectively (Table 5). In the polymers prepared by the oxidative polycondensation method (Eq. 13), the metal atoms are arranged at intervals of approximately twice the distance compared with that formed in the dehydrohalogenation reaction (Eqs. 11 and 12). 

Polycondensation Methods of Preparing Ladder Polymers (Multifunctional Condensation)... 

Polycondensation methods for thermostable polymer synthesis 86MI12. Polyimides from heterocyclic monomers 80UK2418. 

The polymers prepared by condensation techniques have broad molecular weight distributions but the method is applicable to monomers which cannot be polymerized otherwise. Therefore the synthesis of macromonomers and subsequently graft copolymers with polycondensation methods present special interest. 

Table 4 summarizes the data reported on the synthesis of graft copolymers through macromonomers prepared by polycondensation methods. 

J/n < 6,000). Often, no analytical data or structural characterization was provided. Room-temperature interfacial polycondensation methods were also investigated as a convenient alternative to classical polycondensations. Such methods were first reported for the preparation of polyamides and polyesters from the reaction of l,l -ferrocenyldi-carbonyl chloride with several diamines and diols. The synthesis of polyurethanes using this technique was also reported and involved the condensation of l,T-ferrocenedimethanol and l,T-bis(dihydroxyethyl)ferrocene with diisocyanates. Once again, however, these polymers possessed low molecular weights.The early research in these areas has been summarized and critically reviewed and will not be discussed further here. ... 

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