| 摘要 |
Various polymeric compositions, including bicomponent networks and multiblock copolymers, containing polyisobutylene are synthesized by linking a plurality of polyisobutylene polymer chains with siloxane compounds having at least two SiH moieties. Specifically, bicomponent networks are synthesized by linking multifunctional polyisobutylenes, preferably tri-telechelic allyl-terminated polyisobutylenes, with multifunctional linear polysiloxanes, such as di-telechelic linear SiH-terminated polydimethylsiloxane, by hydrosilation. Similarly, multiblock copolymers are synthesized by endlinking difunctional allyl-terminated polyisobutylenes with difunctional SiH-terminated linear polysiloxanes, such as polydimethylsiloxanes, by hydrosilation. Still other polymeric networks comprising polyisobutylene are synthesized by linking multifunctional polyisobutylenes, preferably di- or tri-telechelic allyl-terminated polyisobutylenes, with multifuntional SiH-containing compounds, preferably cyclosiloxanes such as hexamethylhexahydrocyclosiloxane, by hydrosilation.
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