A series of poly(p-phenylene alkylene)s with methylene run lengths ranging from 8 to 40 were obtained by ADMET polymerization of symmetrical α,ω-diene monomers and subsequent exhaustive hydrogenation.

The history of and major advances in the acyclic diene metathesis (ADMET) reaction are described. Because precise branch identity and frequency can be achieved by ADMET polymerizations of symmetrical a,xdienes, polyethylenes with precisely spaced alkyl branches of specified length have been prepared. Investigations of their morphologies and thermal properties have provided valuable insight into the behavior of polyethylene. AD-MET preparation of ethylene copolymers and telechelic oligomers, as well as the properties of these materials, is also discussed.

Herein, we review the major advances in controlling polyethylene morphology through precise control of branch frequency and identity. This control is made possible by the acyclic diene metathesis reaction.

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Correction for ‘Unveiling the hyperbolic thermal behaviour of poly(p-phenylene alkylene)s’ by Nicolas F. Sauty et al., Polym. Chem., 2015, 6, 6073–6082.