Oligomeric poly

In all cases investigated, the cycloacylation reaction also occurred at the exocyclic nitrogen atoms. In order to obtain precursors for oligomeric/poly-meric heterofulvalenes the TAFs of type 85 were condensed with ortho es-... 

Table 2(a) Ground electronic states (GS) of oligomeric poly(phenoxyl) radicals. 

The structures of benzylic carbanions have been extensively studied and a summary of the more important recent results is presented in Table 15. The H-NMR spectrum of benzyl potassium 202) in THF is upfield of that of benzyllithium 203) as expected on the basis of the relative polarizing powers of the two cations. The spectrum of oligomeric poly(styryl)lithium which is qualitatively similar, is shifted upfield on... 

Fig. 27. A plot showing the values of Xjj calculated from heat of mixing data for chlorinated paraffins with oligomeric poly-(methyl methacrylate). This is more favourable for higher chlorine content. Also shown are the values which had to be used to simulate the spinodal curves shown in the following figure...

Big. 28. The experimental cloud point curves (solid lines) and simulated spinodal curves (dotted) for an oligomeric poly(methyl methacrylate) with chlorinated paraffin (octadecane) with (A) 17-4% Cl, (B) 24.6% Cl and (C) 33.4% Cl. The cloud points are probably closer to the binodals than the spinodals which might explain the diflerence in shape. The chlorinated paraffin with the highest chlorine content is found to be the most miscible... 

An ABA block copolyirm was prepared using the latter route. That is, the A blocks were CTA and the B block an oligomeric poly(etfaylene-co-propylene) adipate (PEPA). 

NMR-studies indicate a reduced segmental mobility and higher order parameter for the central hydrocarbon fragments of bola-surfactants [437] compared to the tail ends of the corresponding monomers. The differences however are less pronounced as for oligomeric poly soaps [68, 69],... 

Phosphoranimine condensation was discussed in recent reviews and mechanistic studies. A step-wise progression is shown in Scheme 12. Poly (propyleneglycol) (PPG), terminated with amine groups, reacts with bis-tiifluormethylbromo-N-trimethylsilylphosphoranimine to form the PPG-phosphazene adduct. Oligomeric poly(dichlorophosphazene) is formed from the ambient temperature condensation of tris-trifluoroethoxy-N-trimethyl-... 

The comb-branched polymers based on the phosphazene backbone, —(—R2P=N-),—, where R is an oligomeric poly(ethylene oxide) side chain capped by —OCH3, are amorphous polymers with very low TgS [12, 13] (Table 3.1). As mentioned earlier, a prominent example of the phosphazene polymers is MEEP. 

End linking by an addition reaction between vinyl groups at the ends of a polymer chain and the active hydrogen atoms on silicon atoms in an oligomeric poly(methyl hydrogen siloxane). The case shown gives a junction functionality, , of six. 

A similar situation may occur in the case of networks end linked using the addition reaction involving vinyl chain ends and hydrogen atoms in an oligomeric poly(methyl hydrogen siloxane). - 295-298 g gg gf... 

Fig. 16. Oligomeric poly(ethylene) telomer with CCI4. The term oligomeric is part of the CAS Registry record name only in records marked with an asterisk (see text for details).

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