Functional Alkyl‐Ferrocene Grafted Hydroxyl Terminated Polybutadiene. Issue 31 (18th August 2021)

• Record Type: Journal Article
• Authors: kumar Sikder, Bikash; Naidu Ganivada, Mutyala; Jana, Tushar
• Is Part Of: ChemistrySelect. Volume 6:Issue 31(2021)
• Page Start: 8058
• Page End: 8062
• Publication Date: 2021-08-18
• Subjects: Ferrocene -- Ferrocene-alkyl-silane -- Hydroxyl terminated polybutadiene -- Polymeric binder -- Propellant; Chemistry -- Periodicals; 540.5
• DOI: 10.1002/slct.202101838
• Languages: English
• ISSNs: 2365-6549

Abstract

Abstract: Grafting of functional ferrocene molecules in the backbone of hydroxyl terminated polybutadiene (HTPB) without altering physical characteristics such as viscosity, hydroxyl value, molecular weight of the pristine HTPB remains as an important challenge owing to the difficulty in synthesizing appropriate functional ferrocene molecules and the suitable grafting methodology. The present report describes a facile and cost‐effective process for the synthesis of thiol, silyl and halogen derivatives of alkyl‐ferrocene. This process delineates the use of cyclic anhydrides as precursor for functionalizing ferrocene with terminal carboxylic acid in order to purify via acid‐base workup. The synthetic process includes moderate reaction conditions with good to excellent yields. The ferrocene‐alkyl‐silane and ferrocene‐alkyl‐thiol are grafted covalently to the pendent vinylic groups of HTPB with unaltered physical characteristic in order to prepare polymeric binders with enhanced burn rate for the use in composite solid propellant for aerospace applications. Abstract : A readily workable and cost‐effective process for the synthesis of functional (thiol, halogen and silyl) alkyl‐ferrocenes and their grafting into the hydroxyl terminated polybutadiene (HTPB) without altering the inherent physical properties (like viscosity, hydroxyl value, molecular weight etc.) of HTPB have been achieved in order to develop the polymeric binder for the potential use as burn‐rate modifier in the composite solid propellant for aerospace applications.