NC/GAP-TPE共混聚合物的制备和性能研究  

Preparation and characterization of polymer blends of NC and GAP-TPE

作　　者：左海丽[1] 肖乐勤[1] 菅晓霞[1] 周伟良[1] 

机构地区：[1]南京理工大学化工学院,南京210094

出　　处：《固体火箭技术》2011年第4期488-491,共4页Journal of Solid Rocket Technology

摘　　要：采用扩链后共混再熟化的方法,制备了1组不同组成的硝化棉(NC)/含能热塑性弹性体(GAP-TPE)共混聚合物。采用红外光谱(FTIR)和X射线衍射(XRD)表征NC/GAP-TPE共混物的结构,扫描电镜(SEM)观察共混物的断面,动态热机械分析(DMA)测定共混物的玻璃化转变,运用拉伸实验研究不同配比NC/GAP-TPE共混物的力学性能。结果表明,NC和GAP-TPE分子间存在氢键相互作用。NC均匀分散在GAP-TPE基体中,不同配比的NC/GAP-TPE共混物均存在1个玻璃化温度,二者之间具有较好的相容性。当NC含量从5%到20%变化时,共混试样的拉伸强度从10.4 MPa增加至20.4 MPa,提高了49%。A series of blends of energetic thermoplastic polyurethane（GAP-TPE）and Nitrocellulose（NC）were prepared by the way of chain extension,blend and aging.The structures of the blends were analyzed by means of FTIR spectroscopy,wide-angle X-ray diffraction,and scanning electron microscopy.The compatibility and properties of the blends were characterized by dynamic mechanical analysis（DMA）and tensile testing.It suggests that nitrocellulose molecules penetrate into the polyurethane and interrupt the intra-hydrogen bonding between the hard and soft segments.The results indicate that the blended sheets exhibited good miscibility.The tensile strength increased with an increase of NC content.The blends NC/GAP-TPE having 5%~20% NC exhibited a significant increase from 10.4 MPa to 20.4 MPa for tensile strength,49% increased.

关 键 词：GAP 热塑性弹性体 硝化棉 共混 

分 类 号：V512[航空宇航科学与技术—航空宇航推进理论与工程]