PREPARATION OF POLYISOBUTYLENE-BASED POLYMER NETWORKS BY THIOL-ENE CHEMISTRY

摘要

A PIB-based polymer network includes at least one sulfur containing segment and at least two PIB polymer segments. The at least two PIB polymer segments each include a core and at least two polyisobutylene polymer chains extending therefrom. The at least one sulfur containing segment includes at least one sulfur atom that is located between any two polyisobutylene polymer chains from two different PIB polymer segments, so that the sulfur containing segment connects those two different PIB polymer segments together. The PIB-based polymer network is produced by the thiol-ene reaction in the presence of light or heat. The reaction products include at least two polyisobutylene polymer precursor moieties, each polyisobutylene polymer precursor moiety having at least two end group selected from the end groups —CH₂—CH(CH₃)═CH₂, —CH₂═C(CH₃)₂, and —CH₂—CH═CH₂; and at least one multi-functional thiol.