Precursor formulations for a liner, a rocket motor including the liner, and related methods

A method of lining a rocket motor, comprising:

• applying a precursor formulation of a liner to a rocket motor, the precursor formulation of the liner comprising:
• a liner polymer;
• a curative formulated to react with the liner polymer;
• and
• a blocked curative formulated to be substantially unreactive with the liner polymer, the blocked curative comprising an isocyanate compound that has been pre-reacted with a blocking agent to substantially prevent the isocyanate compound from reacting with the liner polymer at room temperature;
• reacting the liner polymer with the reactive curative to form a liner;
• applying a precursor formulation of a propellant to the liner;
• removing the blocking agent from the isocyanate compound of the blocked curative at an elevated temperature to generate a reactive isocyanate curing agent;
• and
• reacting a propellant polymer of the precursor formulation of the propellant with the reactive isocyanate curing agent.

A rocket motor, comprising:

• an insulation in a casing of a rocket motor;
• a liner on the insulation, the liner comprising:
• a reaction product of a liner polymer and a reactive curative;
• and
• a blocked curative formulated to be substantially unreactive with the liner polymer,
• the blocked curative comprising an isocyanate compound that has been pre-reacted with a blocking agent to substantially prevent the isocyanate compound from reacting with the liner polymer at room temperature, and
• the blocking agent removed from the isocyanate compound of the blocked curative at an elevated temperature to generate a reactive isocyanate curing agent;
• and
• a propellant on the liner, the propellant comprising:
• a reaction product of a propellant polymer, the reactive isocyanate curing agent, and a propellant curative.