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Radical depolymerisation mechanism

They found that thermal degradation of poly(4- -alkyl styrenes) followed mainly a free radical depolymerisation mechanism. The main product is a monomer similar to unsubstituted PS, i.e., 59% to 92% monomer from poly(4-n alkyl styrenes) ranging from 136,500-737,000 and = 37,000-99,000. The amoxmts of this monomer decrease with increasing length of alkyl sidechain from hexyl to decyl. This behaviour is connected with the stability of monomer under isothermal pyrolysis conditions at 600 °C. [Pg.32]

Depolymerisation is a free radical mechanism in which the polymer essentially reverts to a monomer or monomers. Unlike random scission, which produces fragments of a variety of chain lengths, depolymerisation generates a simple chromatogram consisting of large peaks for the monomers from which the polymer or copolymer was produced ... [Pg.4]

The mechanism of degradation of polybutadiene, as suggested by Golub and Gargiulo [63], involves main-chain scission to give radical ends, which can undergo depolymerisation (to yield mainly vinyl cyclohexane and butadiene) [64] or cyclisation to give cyclised polybutadiene. [Pg.190]


See other pages where Radical depolymerisation mechanism is mentioned: [Pg.59]    [Pg.201]    [Pg.117]    [Pg.204]    [Pg.60]    [Pg.15]    [Pg.197]    [Pg.107]    [Pg.11]    [Pg.226]    [Pg.227]    [Pg.303]    [Pg.32]    [Pg.32]    [Pg.58]    [Pg.68]    [Pg.89]    [Pg.112]    [Pg.175]    [Pg.28]    [Pg.281]   
See also in sourсe #XX -- [ Pg.32 ]




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