Itaconate trimer

Fig. 14. Skeletal diagrams of the itaconate trimer showing atoms locked in space and the energetic requirements of rotations about various bonds. Rotation about (a) bond (C -Ci) (b) bond (Cj-Cg) (c) bond (C1-C2) and (d) and (e), bond (C1-C2) with increasing restrictions. Energies in kJ/mol are given to the right of each diagram.

Lower values of 10 L mol for dodecyl (meth)acrylate is attributed to shielding of the radicals by the longester groups for these monomers fej remains relatively constant up to 60% conversion [64]. Even lower kt values are measured for termination during polymerization of stericaDy hindered monomers such as the itaconates [74] and acrylate trimer species [44]. The variation of low-conversion kt with polymer composition in copolymer systems can be represented by Eq. (55). 

Fig. 13. (a) Dimethyl itaconate model trimer, rm) stereochemistry, (b) Model trimer viewed down the main chain axis. 

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