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Synthesis and properties of some linear oligobenzyls and polybenzyls

✍ Scribed by Montaudo, G. ;Bottino, F. ;Caccamese, S. ;Finocchiaro, P. ;Bruno, G.


Publisher
Wiley (John Wiley & Sons)
Year
1970
Tongue
English
Weight
545 KB
Volume
8
Category
Article
ISSN
0449-296X

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✦ Synopsis


Abstract

Properties of some linear oligobenzyls corresponding to polybenzyl, poly(2,5‐dimethylbenzyl), and poly(2,3,5,6‐tetramethyl‐benzyl) systems are correlated to those of relative polymers. From infrared and x‐ray diffraction data, evidence is found that
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oligomers tend to assume the same crystal structure of the polymer as early as teh tetramer or pentamer stage. Syntheses of oligomers are described. Linear, crystalline polymers, necessary for comparison with oligomers, have been prepared and characterized. Polymerization conditions have been explored to some extent; relevant data are tabulated and discussed.


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Soluble polybenzyls were prepared by a catalytic electrophilic Friedel-Crafts type polycondensation between a,aΒΊ-dichloro-p-xylene and substituted (by an alkyl or an alkoxy side-chain) mesitylene. The inΓ½uence of the length of the side-chain on the solubility of the polymer was examined. The polymer