Telomeres photoreticulables—2. Synthese de telomeres photoreticulables a partir des hydroxy-2-ethyl acrylate et methacrylate et des β-cinnamoyl oxy ethyl acrylate et methacrylate

Photocrosslinkable telomers based on cinnamoyl derivatives of polyacrylates and methacrylates can be prepared either by reaction of cinnamoyl chloride with telomers of hydroxy-2-ethyl acrylate and methacrylate, or by direct telomerisation of β-cinnamoylethyl acrylate and methacrylate. The first method gives products containing at least 70% of the theoretical maximum olefinic unsaturation but with low $\text{DP}$_n 1–20]; the second method gives telomers of high $\text{DP}$_n with the maximum number of cinnamoyl side-chains.