摘要
以聚己二酸乙二醇丙二醇酯(PEPA)、环氧乙烷/四氢呋喃无规共聚醚(PET)、异佛尔酮二异氰酸酯(IPDI)以及二羟甲基丙二酸二乙酯(DBM)为原料采用熔融预聚法合成了侧链含有酯基的热塑性聚氨酯弹性体(TPUE)。用傅立叶变换红外(FTIR)、凝胶渗透色谱(GPC)、差示扫描量热分析(DSC)和拉伸实验对聚氨酯弹性体的结构和性能进行了表征。结果表明,合成的热塑性聚氨酯弹性体具有较高的相对分子质量(Mn>8×104),相对较低的软段玻璃化转变温度(Tg<-56℃),具有一定的低温力学性能,并且当硬段质量分数为50%～60%时,呈现较好的力学性能(σm>18MPa,εb>500%)。在改性双基推进剂中引入TPUE,推进剂的低温力学性能明显提高,高温强度稍有降低。
A series of novel thermoplastic polyurethane elastomers（TPUE） containing side ester groups which can be used as propellant 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（Mn8×104）,and have relatively lower glass transition temperature of soft segment（Tg-56℃）which indicate that they have good low temperature mechanical properties.The elastomers exhibit optimum mechanical properties（σm18 MPa and εb500%） 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.
出处
《火炸药学报》
EI
CAS
CSCD
北大核心
2010年第6期39-42,共4页
Chinese Journal of Explosives & Propellants
基金
基础产品创新计划火炸药专项资助(A2220061373)
关键词
有机化学
热塑性聚氨酯
有机合成
弹性体
改性双基推进剂
力学性能
organic chemistry
thermoplastic polyurethane
organic synthesis
elastomer
modified double base propellant
mechanical properties
