Vinyl terminated silicone fluids serve as critical reactive intermediates in platinum-catalyzed addition-cure systems for silicone elastomers. The terminal vinyl groups (Vi-PDMS-Vi) participate in hydrosilylation crosslinking with Si-H functional crosslinkers, enabling:

Precision cure control: Stoichiometric reactivity ensures consistent durometer (Shore A 10-80 range)

Enhanced mechanical properties: 300% improvement in tear strength compared to hydroxyl-terminated analogs

Low compression set: <10% permanent deformation in automotive seals after 500h at 150°C

Recent breakthroughs include telechelic vinyl/fluorosilicone hybrids for fuel-resistant gaskets in EV battery packs.