交联密度对环氧树脂低温性能及液氧相容性的影响
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摘要
采用二氨基二环己基甲烷(PACM)与丙烯腈反应制备了具有不同分子质量的胺固化剂以改变树脂体系的交联密度。通过动态热力学分析仪测试(DMA)、力学性能测试和液氧敏感测试,研究了交联密度对环氧固化物的耐热性、低温性能及液氧相容性的影响。结果表明,随着环氧树脂交联密度的降低,其玻璃化转变温度(Tg)随之降低,低温老化后弹性模量变化率变小,液氧敏感系数变小,液氧相容性提高。
The curing agents with different molecular weights for changing the crosslinking density of epoxy resin systems were synthesized by the reaction of diaminodicyclohexylmethane(PACM) with acrylonitrile. The effects of crosslink density on heat resistance,low temperature performance and liquid oxygen compatibility of cured epoxy resins were investigated by dynamic thermomechanical analyzer test(DMA),mechanical property test and liquid oxygen sensitivity test. The results showed that the glass transition temperature(Tg) was decreased with the decreasing of crosslink density of epoxy resin.The change rate of elastic modulus was decreased after low temperature aging. The sensitivity coefficient of liquid oxygen was smaller and the compatibility of liquid oxygen was improved.
The curing agents with different molecular weights for changing the crosslinking density of epoxy resin systems were synthesized by the reaction of diaminodicyclohexylmethane(PACM) with acrylonitrile. The effects of crosslink density on heat resistance,low temperature performance and liquid oxygen compatibility of cured epoxy resins were investigated by dynamic thermomechanical analyzer test(DMA),mechanical property test and liquid oxygen sensitivity test. The results showed that the glass transition temperature(Tg) was decreased with the decreasing of crosslink density of epoxy resin.The change rate of elastic modulus was decreased after low temperature aging. The sensitivity coefficient of liquid oxygen was smaller and the compatibility of liquid oxygen was improved.
引文
[1]舒鹏.Cf/改性环氧复合材料低温界面性能及液氧相容性研究[D].哈尔滨:哈尔滨工业大学,2013.
[2]Sumrall J,Creech S.Refinements in the Design of the Ares V Cargo Launch Vehicle for NASA's Exploration Strategy[C]//Aiaa/asme/sae/asee Joint Propulsion Conference&Exhibit.2013.
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[6]Hshieh,Fu-Yu,Beeson,Harold D.Flammability testing of flameretarded epoxy composites and phenolic composites[J].Fire&Materials,2015,21(1):41-49.
[7]Levchik S V,Weil E D.Thermal decomposition,combustion and flame-retardancy of epoxy resins-a review of the recent literature[J].Polymer International,2010,53(12):1901-1929.
[8]Burns L A,Feih S,Mouritz A P.Compression Failure of Carbon Fiber-Epoxy Laminates in Fire[J].Journal of Aircraft,2015,47(2):528-533.
[9]Peckham H M,Hauser R L.Compatibility of Materials with Liquid Oxygen[M]//Advances in Cryogenic Engineering.Springer US,1960:26-46.
[10]朱广超,王贵友,胡春圃.交联密度对脂肪族聚氨酯弹性体结构与性能的影响[J].高分子学报,2011,55(3):274-280.
[11]Wang L,Shen Y,Lai X,et al.Synthesis and properties of crosslinked waterborne polyurethane[J].Journal of Polymer Research,2011,18(3):469-476.
[12]Lei L,Xia Z,Ou C,et al.Effects of crosslinking on adhesion behavior of waterborne polyurethane ink binder[J].Progress in Organic Coatings,2015,88:155-163.
[13]Kim B,Choi J,Yang S,et al.Influence of crosslink density on the interfacial characteristics of epoxy nanocomposites[J].Polymer,2015,60:186-197.
[14]林丽,张红,李远,等.热固性聚合物的交联密度测试方法研究进展[J].热固性树脂,2012,27(5):60-63.
[2]Sumrall J,Creech S.Refinements in the Design of the Ares V Cargo Launch Vehicle for NASA's Exploration Strategy[C]//Aiaa/asme/sae/asee Joint Propulsion Conference&Exhibit.2013.
[3]Seal E C,Elfer N C,Brandt T,et al.High performance,thin metal lined,composite overwrapped pressure vessel:US6401963 B1[P].2002-06-11.
[4]Chato D.Cryogenic Technology Development for Exploration Missions[J].Aiaa Journal,2007.
[5]Achary DC,Biggs RW,Bouvier CG,et al.Composite Development&Applications for Cryogenic Tankage[J].46th AIAA/ASME/ASCE/AHS/ASC Structures,Structural Dynamics&Material Conference,2005:118-121
[6]Hshieh,Fu-Yu,Beeson,Harold D.Flammability testing of flameretarded epoxy composites and phenolic composites[J].Fire&Materials,2015,21(1):41-49.
[7]Levchik S V,Weil E D.Thermal decomposition,combustion and flame-retardancy of epoxy resins-a review of the recent literature[J].Polymer International,2010,53(12):1901-1929.
[8]Burns L A,Feih S,Mouritz A P.Compression Failure of Carbon Fiber-Epoxy Laminates in Fire[J].Journal of Aircraft,2015,47(2):528-533.
[9]Peckham H M,Hauser R L.Compatibility of Materials with Liquid Oxygen[M]//Advances in Cryogenic Engineering.Springer US,1960:26-46.
[10]朱广超,王贵友,胡春圃.交联密度对脂肪族聚氨酯弹性体结构与性能的影响[J].高分子学报,2011,55(3):274-280.
[11]Wang L,Shen Y,Lai X,et al.Synthesis and properties of crosslinked waterborne polyurethane[J].Journal of Polymer Research,2011,18(3):469-476.
[12]Lei L,Xia Z,Ou C,et al.Effects of crosslinking on adhesion behavior of waterborne polyurethane ink binder[J].Progress in Organic Coatings,2015,88:155-163.
[13]Kim B,Choi J,Yang S,et al.Influence of crosslink density on the interfacial characteristics of epoxy nanocomposites[J].Polymer,2015,60:186-197.
[14]林丽,张红,李远,等.热固性聚合物的交联密度测试方法研究进展[J].热固性树脂,2012,27(5):60-63.