Iron containing hydroxyl terminated polybutadiene (Fe-HTPB) based binder cum burn rate catalyst has been developed without altering the crucial physical properties of HTPB. Ferrocene, the source of Fe in the Fe-HTPB, has been grafted at the terminal carbons of HTPB to ensure no alternation in microstructure of HTPB which in turn helped in retaining physical properties of pristine HTPB. Non aluminized composite solid propellants (CSPs) with 86% (wt%) ammonium perchlorate loading were prepared using Fe-HTPB as a binder for studying the burn rate efficiency. Burn rates of CSPs made from Fe-HTPB binders were found to be enhanced by ∼125% compared to CSPs of pristine HTPB [1]. All the CSPs made from Fe-HTPB were found to be very stable as their pressure index is less than 0.5. Also, non-hydrogen bonded, segmented polyurethane (SPU) of ferrocene functionalized polybutadiene diol has been synthesized and studied in depth to understand the role of ferrocene moiety in the structure property relationship of SPU [2]. Interactions among hard segments of SPU through the ferrocene moiety played a vital role in the separation of hard and soft segments. In depth studies revealed the presence of a strong microphase separation between hard and soft segments which resulted in the formation of nano hard segment domain (HSD) in polyurethane and thus yielded SPU. Though we could not identify any hydrogen bonding between the PU chains but due to the presence of ferrocene moiety on the adjacent carbon of urethane group, favorable electrostatic interaction between the hard segments has been identified. This interaction was found to be the driving force for the formation of micrometer scale assemblies of nano HSD and the size of nano HSD assembly increases with increasing ferrocene content in the HTPB. This dependency confirming that the presence ferrocene functional moiety is responsible for formation of assembly of nano HSD.