Synthesis of oligomeric poly(silarylene-siloxane-acetylene)'s and their conversion to high temperature plastics, elastomers, and coatings

A networked polymer comprising the formula:

• wherein n>0;
• wherein n is an average value obtained by averaging all repeating units of the networked polymer;
• wherein m≧1;
• wherein Y is a divalent group containing one or more acetylenic groups, one or more crosslinks, or both;
• wherein z is the average number of crosslinks per Y group;
• wherein Ar1 and Ar2 are independently selected aromatic groups;
• and
• wherein each R is independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl, and combinations thereof.

A process of preparing a precursor comprising the formula;

• wherein n>0;
• wherein n is an average value obtained by averaging all repeating units of the precursor;
• wherein m≧1;
• wherein X is a divalent group containing one or more acetylenic groups;
• wherein Ar1 and Ar2 are independently selected aromatic groups;
• and
• wherein each R is independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl, and combinations thereof;
• comprising the step of:
• reacting a prepolymer comprising the formula:
• with a bis(dimethylaminosilyl)alkyne comprising the formula:
• wherein X is a divalent group containing one or more acetylenic groups.

A process of preparing a networked polymer comprising the formula:

• wherein n>0;
• wherein n is an average value obtained by averaging all repeating units of the networked polymer;
• wherein m>1;
• wherein Y is a divalent group containing one or more acetylenic groups, one or more crosslinks, or both;
• wherein z is the average number of crosslinks per Y group;
• wherein Ar1 and Ar2 are independently selected aromatic groups;
• and
• wherein each R is independently selected from the group consisting of alkyl, aryl, alkylaryl, haloalkyl, haloaryl, and combinations thereof;
• comprising the step of:
• crosslinking a precursor comprising the formula:
• wherein X is a divalent group containing one or more acetylenic groups.