| 含亚甲基链段柔性固化剂的制备与性能研究 |
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| 引用本文： | 孙鹏,李镇江,梁玮,张林.含亚甲基链段柔性固化剂的制备与性能研究[J].中国胶粘剂,2012(6):1-5. |
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| 作者姓名： | 孙鹏 李镇江 梁玮 张林 |
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| 作者单位： | 中国工程物理研究院激光聚变研究中心;西南科技大学材料科学与工程学院;西南科技大学极端条件物质特性实验室 |
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| 基金项目： | 中国工程物理研究院科学技术发展基金资助项目(2008A0302014);中国工程物理研究院双百人才基金资助课题项目(20088074) |
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| 摘 要： | 以双官能度EP(环氧树脂)对脂肪族二胺进行改性,制备了含多段长亚甲基链段的柔性固化剂。采用FT-IR(红外光谱)法、TGA(热失重分析)法、非等温DSC(差示扫描量热)法和β-T(升温速率-温度)外推法等对改性固化剂的结构、改性固化剂/EP胶粘剂的性能(包括热稳定性、动态力学参数和最佳固化温度等)进行了分析和验证。结果表明:改性固化剂/EP胶粘剂固化体系的表观活化能为86.73 kJ/mol、反应级数为1.24和最佳固化温度为66℃;当n(EP):n(改性固化剂)=1:0.50时,相应胶接件的-196℃、室温、60℃剪切强度分别为16.84、14.73、13.52 MPa,说明其强度和韧性俱佳,并且完全满足实际使用要求。
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| 关 键 词： | 环氧树脂 长亚甲基 改性 固化剂 动力学 |
Study on preparation and properties of a flexible curing agent with methylene chain segments |
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| Sun Peng,Li Zhenjiang,Liang Wei,Zhang Lin.Study on preparation and properties of a flexible curing agent with methylene chain segments[J].China Adhesives,2012(6):1-5. |
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| Authors: | Sun Peng Li Zhenjiang Liang Wei Zhang Lin |
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| Affiliation: | 1 (1.Research Center of Laser Fusion,China Academy of Engineering Physics,Mianyang 621900,China;2.School of Materials Science and Engineering,Southwest University of Science and Technology,Mianyang 621010,China; 3.Laboratory for Matter Characteristic Research at Extreme Condition,Southwest University of Science and Technology,Mianyang 621010,China) |
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| Abstract: | With EP(epoxy resin) with difunctional groups as modifier of aliphatic diamine,a flexible curing agent with long methylene chain segments was prepared.Its structure and corresponding EP adhesive properties(including thermal stability,dynamic mechanical parameters and optimum curing temperature) were analysed and validated by FT-IR(infrared spectroscopy),TGA(thermogravimetry),non-isothermal DSC(differential scanning calorimetry) andβ-T(heating speed-temperature) extrapolation methods.The results showed that the apparent activation energy was 86.73 kj/mol,reaction order was 1.24,and optimal curing temperature was 66℃for modified curing agent/EP curing system.The modified curing agent/EP curing system had better strength and toughness,and could full meet the practical application requirements because the shear strength of corresponding bonded samples at -196℃,room temperature or 60℃were 16.84,14.73,13.52 MPa respectively when molar ratio of n(EP):n(modified curing agent) was 1:0.50. |
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| Keywords: | epoxy resin(EP) long methylene modified curing agent dynamics |
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