Abstract
Natural polyisoprenes modified by the introduction of cinnamoyl groups have been obtained as films. In these polymers, aliphatic-(CH2)n- spacers of different lengths separate the main chain from the photosensitive group. Density measurements have been carried out, and the kinetic treatment of the photodimerization reaction is described. The relation between Tg and kobs to the size of the aliphatic spacer suggests that, at least for n=2 to 6, other factors may be affecting the reactivity of the cinnamoyl group.
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