Abstract
AbstractSummary: We recently reported the synthesis of polyisobutylene (PIB) via direct initiation by epoxycyclohexyl isobutyl polyhedral oligomeric silsesquioxane (POSS®) (Figure 1) in conjunction with titanium tetrachloride (TiCl4). This system successfully initiated the living carbocationic polymerization of isobutylene (IB) in hexane/methyl chloride (Hx/MeCl ‐60/40, v/v) at T = −80 °C, yielding an asymmetric telechelic PIB with one POSS® cage head group and one tert‐Cl end group.1 This paper will discuss IB polymerizations initiated by 1,2‐epoxycyclohexane and bis[3,4‐(epoxycyclohexyl)ethyl]‐tetramethyl‐disiloxane, in conjunction with TiCl4.
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