Morphology and properties of novel thermoplastic polyurethane elastomer

作者：Zhang WenYu^*; Li Jinqing; Luo Yunjun

来源：Chinese Journal of Explosives & Propellants, 2010, 33(6): 39-42.

• Elastomer
• Modified double base propellant
• Organic chemistry
• Organic synthesis
• Smechanical properties
• Thermoplastic polyurethane

A series of novel thermoplastic polyurethane elastomers(TPUE) containing side ester groups which can be used as propeliam binder were synthesized from polyethylene/polypropylene adipate diol ( PEPA ), tetrahydrofuran/ethylene oxide copolyether ( PET ), isophorone diisocyanate ( IPDI ) and diethyl bis (Hydroxymethyl) malonate (DBM) as primary substances by melt pre-polymerization method. FTIR, GPC, DSC and tensile test were employed to characterize the structures and properties of TPUE. Results show that the polyurethane elastomers present higher molecular weight (Mn>8×104), and have relatively lower glass transition temperature of soft segment (T, < -56 C) which indicate that they have good low temperature mechanical properties. The elastomers exhibit optimum mechanical properties (σ >18 MPa and ε>500) when the hard segment concentration is controlled between 50 and 60. When the TPUE is introduced into modified double base propellant, the mechanical properties at low temperature are remarkably improved and the tensile strength at high temperature are slightly lowered.

• 出版日期2010
• 单位北京理工大学