Polyhedral oligomeric silsesquioxane and carborane containing network

Abstract

A thermoset and method of making such by crosslinking a mixture of a polyhedral oligomeric silsesquioxane having pendent siloxane groups or unsaturated carbon bonds and a siloxylcarborane compound having unsaturated carbon bonds.

1 . A thermoset made by crosslinking a mixture comprising:
 a polyhedral oligomeric silsesquioxane having pendent unsaturated carbon bonds; and   a siloxylcarborane compound having unsaturated carbon bonds;
 wherein the crosslinking occurs between the unsaturated carbon bonds of the polyhedral oligomeric silsesquioxane and unsaturated carbon bonds of the siloxylcarborane compound. 
   
   
   
       2 . The thermoset of  claim 1 , wherein the siloxylcarborane compound is bis(vinyltetramethyldisiloxyl)m-carborane. 
   
   
       3 . The thermoset of  claim 1 , wherein the polyhedral oligomeric silsesquioxane is: 
     
       
         
         
             
             
         
       
     
   
   
       4 . The thermoset of  claim 1 , wherein a siloxane curing agent having silyl hydrogens is used as a curing agent. 
   
   
       5 . The thermoset of  claim 4 ;
 wherein the polyhedral oligomeric silsesquioxane is ((CH 2 ═CH)SiO 1.5 ) 8 ; and   wherein the siloxane curing agent is tetrakis(dimethylsiloxyl)silane, methyltris(dimethylsiloxyl)silane, or phenyltris(dimethylsiloxyl) silane.   
   
   
       6 . A method comprising:
 crosslinking a mixture comprising:
 a polyhedral oligomeric silsesquioxane having pendent unsaturated carbon bonds; and 
 a siloxylcarborane compound having unsaturated carbon bonds; 
 wherein the crosslinking occurs between the unsaturated carbon bonds of the polyhedral oligomeric silsesquioxane and unsaturated carbon bonds of the siloxylcarborane compound. 
   
   
   
       7 . The method of  claim 6 , wherein the siloxylcarborane compound is bis(vinyltetramethyldisiloxyl)m-carborane. 
   
   
       8 . The method of  claim 6 , wherein the polyhedral oligomeric silsesquioxane is: 
     
       
         
         
             
             
         
       
     
   
   
       9 . The method of  claim 6 , wherein a siloxane curing agent having silyl hydrogens is used as a curing agent. 
   
   
       10 . The thermoset of  claim 9 ;
 wherein the polyhedral oligomeric silsesquioxane is ((CH 2 ═CH)SiO 1.5 ) 8 ; and   wherein the siloxane curing agent is tetrakis(dimethylsiloxyl)silane, methyltris(dimethylsiloxyl)silane, or phenyltris(dimethylsiloxyl) silane.