Silicone rubber formulations with tunable damping properties and method of preparation thereof

A formulation comprising:

• 1-99 mol % of copolymer of poly(dimethyl)(diphenyl) siloxane comprising between 5 and 70 mol % diphenylsiloxane, the copolymer bearing an unsaturated moiety;
• and
• 1-99 mol % poly-N1,N2-siloxane polymer bearing the unsaturated moiety, wherein N1 and N2 are each independently selected from the group consisting of substituted or unsubstituted methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, phenyl, phenylethyl, and trifluoropropyl;
• and
• a curing agent having a thiol or a hydridosilane moiety.

A method of making a cured silicone rubber comprising:

• combining a formulation comprising:
• 1-99 mol % of copolymer of poly(dimethyl)(diphenyl) siloxane comprising between 5 and 70 mol % diphenylsiloxane, the copolymer bearing an unsaturated moiety;
• and
• 1-99 mol % poly-N1,N2-siloxane polymer bearing the unsaturated moiety, wherein N1 and N2 are each independently selected from the group consisting of substituted or unsubstituted methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, phenyl, phenylethyl, and trifluoropropyl and
• a photoinitiator to form a mixture;
• and
• applying ultraviolet radiation to the mixture at an ambient temperature to form the cured silicone rubber;
• the cured silicone rubber comprising:
• 1-99 mol % poly-N1,N2-siloxane polymer, wherein, on each separate silicon atom, N1 and N2 are each independently selected from the group consisting of substituted or unsubstituted methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, phenyl, phenylethyl, and trifluoropropyl;
• and
• 1-99 mol % poly(dimethyl)(diphenyl) siloxane copolymer comprising 5 mol %-70 mol % diphenylsiloxane.

A method of making a cured silicone rubber,

• the method comprising:
• combining octaphenylcyclotetrasiloxane, octamethylcyclotetrasiloxane, potassium hexamethyldisilazide, and a promotor to form a mixture;
• polymerizing the octaphenylcyclotetrasiloxane and octamethylcyclotetrasiloxane to obtain a copolymer;
• functionalizing the copolymer to form a copolymer bearing an unsaturated moiety;
• dissolving the copolymer in a solvent;
• adding a silytion agent and a base;
• and
• precipitating the polymer;
• and
• the cured silicone rubber comprising:
• 1-99 mol % of copolymer of poly(dimethyl)(diphenyl) siloxane comprising between 5 and 70 mol % diphenylsiloxane, the copolymer bearing an unsaturated moiety;
• and
• 1-99 mol % poly-N1,N2-siloxane polymer bearing the unsaturated moiety, wherein N1 and N2 are each independently selected from the group consisting of substituted or unsubstituted methyl, ethyl, propyl, butyl, pentyl, hexyl, heptyl, octyl, nonyl, phenyl, phenylethyl, and trifluoropropyl.