Polycene ( Butacene )

Superiority:

1. Polycene is burning rate catalyst which leads to a higher burning rate(20 > mm/s, at 7 Mp) with low pressure exponent (n < 0.5) withoutmigration during missile manufacturing and aging. (a liquid resin based on HTPB and grafted with a ferrocene derivative in the chain; a binder in high burning rate ammonium perchlorate based composite propellants.)

    

   Because most of other ferrocenium perchlorates are highly sensitive to shock/friction/static and have susceptibility to oxidation,

   these products have potential risk of the dangers . However, the chemical structure of Polycene has a vast improvement to prevents migration of the catalyst, and still allows it to be fully miscible with standard HTPB (Hydroxy Terminated Polybutadiene). Polycene can improve rocket’s overall performance from the military perspective.
2. The Physical properties of Polycene are as follows;
3. Trade Name : Polycene

   Generic Name : Butacene 800

   Chemical Name : Organic silicon ferrocene derivatives bonded to HTPB

   CAS# : 125856-62-4

   Iron wt%  : 7.5~8.5%

   Water wt  : < 0.1 %

   Hydroxyl index, meq/g :  0.32 ±0.05

   Viscosity  : ≤ 1000 poise at 25 degrees Celsius

    

   Modified binder which is grafted ferrocene derivative

Ferrocene derivatives like ferrocene, alkylferrocenen and N-butyl ferrocene are widely used as burning rate accelerators in solid composite propellants but are able to vaporize, oxidize or migrate out of the propellant during its manufacture, handling and aging. And those can cause the disoperation of the rocket motor and raise safety and hazard concerns

Polycene unlike other ferrocene derivatives is a vaporization, oxidation and migration free functional ferrocene prepolymer. It is based on HTPB resin grafted with ferrocene derivative which is chemically equipped as one. And it is the advanced catalysts compared to other ferrocene derivatives;