网络结构及增塑剂对PBT弹性体玻璃化转变的影响
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摘要
针对PBT推进剂玻璃化温度高、低温性能不足,难以满足战术发动机宽温使用要求的问题,从粘合剂网络结构与增塑剂两方面,研究了PBT结构单元比例、PBT相对分子质量和固化剂种类对PBT弹性体玻璃化转变的影响,以及多种增塑剂对PBT的增塑效率。结果表明,降低PBT中BAMO链节含量、提高PBT相对分子质量,可显著降低PBT弹性体玻璃化温度。在常用的3种固化剂TDI、IPDI和HDI中,对网络中软段运动能力限制作用强弱为HDI The PBT propellant has high glass transition temperature and poor low temperature performance,so that it is difficultly to satisfy the wide temperature requirement of tactical missile motors.To solve the problem in terms of the binder network structure and plasticiser,the effects of structural unit ratio,molecular weight and the curing agent type on the glass transition temperature of PBT elastomer have been investigated.Furthermore,the plasticization efficiency of various plasticisers has been calculated.The results indicate that the glass transition temperature of PBT elastomer could be reduced obviously by decreasing the content of BAMO unit and increasing molecular weight of PBT.Among three types of curing agent-TDI,IPDI and HDI,the capability to restrict the mobility of soft segment follows the order:HDI
引文
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[2]Manser G E,F letcher R W.Energetic thermoplastic elastomer synthesis,third quarterly summary of progress on contract[R].ADA196885,1988.
[3]葛震,罗运军,郭凯,等.BAMO均聚物及共聚物合成研究进展[J].含能材料,2009,17(6):745-750.GE Zhen,LUO Yunjun,GUO Kai,et al.Review on synthesis of BAMOhomopolymer and Copolymers[J].Chinese Journal of Energetic Materials,2009,17(6):745-750.
[4]赵昱,张晓宏,张伟,等.GAP黏合剂胶片力学性能的影响因素[J].火炸药学报,2016,31(1):79-83.ZHAO Yu,ZHANG Xiaohong,ZHANG Wei,et al.Factors affecting the mechanical properties of GAP binder films[J].Chinese Journal of Explosives&Propellants,2016,31(1):79-83.
[5]Gore G M.BDNPA/F as energetic plasticizer in propellant formulations[C]∥29th International Annual Conference of ICT Karlsruhe,Germany,1998.
[6]Arthur Provatas.Characterisation and binder studies of energetic plasticiser-GLYN oligomer[R].DSTO-TR-1422,2003.
[7]邓蕾,张炜,鲍桐,等.PBT与含能增塑剂相互作用的分子动力学模拟[J].含能材料,2017,25(1):32-38.DENG Lei,ZHANG Wei,BAO Tong,et al.Molecular dynamics simulation of interaction between PBT and energetic plasticezer[J].Chinese Journal of Energetic Materials,2017,25(1):32-38.
[8]何平笙.高聚物的结构与性能[M].北京:科学出版社,2009.HE Pingsheng.Structure and properties of high polymers.Bei Jing:Science Publishers,2009.
[9]Manfred A B,Sara Cerri.Molecular mobility in binder systems[C]∥42nd International Annual Conference of the Fraunhofer ICT,Karlsruhe,Germany,2011:P96.
[10]Kumari D,BalaksheR,Banerjee S.Energetic plasticisers for gun&rocket propellants[J].Review Journal of Chemistry,2012,2(3):240-262.
[11]Arthur Provatas.Energetic polymers and plasticiser for explosive formulations-A review of recent advances[R].DSTO-TR-0966,2000.
[12]Seyidoglu T,Bohn M A.Effect of curing agents and plasticizers on the loss factor curves of HTPB-binders quantified by modelling[C]∥In proc.18th Int.Seminar on New Trends in Research of Energetic Materials(NTREM),Pardubice,Czech Republic,2015.
[13]Seyidoglu T,Bohn M A.Modelling of loss factor curves obtained by torsion-DMA of HTPB and GAP based binders manufactured with different curing agents and plasticizers[C]∥The 46th International Annual Conference of ICT.Karlsruhe,Germany,2015.