Well-Defined and Precision-Grafted Bottlebrush Polypentenamers from Variable Temperature ROMP and ATRP.

Polypentenamer macroinitiators are synthesized through variable temperature ring opening metathesis polymerization of 3-cyclopentenyl α-bromoisobutyrate, which has sufficient ring strain (Δ = -22.6 kJ mol) to produce targeted molar mass (<5% from theoretical), low dispersity (1.17 ≤ ≤ 1.