文章摘要
水下固化弹性密封胶/纳米SiO2复合材料的研制及性能
Preparation and Properties of Underwater Curing Elastomeric Sealant/SiO2 Nanocomposites
  
DOI:10.16865/j.cnki.1000-7555.2018.06.030
中文关键词: 水下固化  弹性密封胶  玻璃化转变温度  使用寿命
英文关键词: underwater curing  elastomeric sealant  glass-transition temperature  working life
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作者单位
苏高申1,2, 罗 跃1, 李 凡3, 陈思雅1, 杨 欢1, 马 超2 1. 长江大学 化学与环境工程学院湖北 荆州 4340232. 油气钻采工程湖北省重点实验室 长江大学石油工程学院湖北 武汉 4301003.中石化石油工程技术研究院北京100101 
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中文摘要:
      采用弹性环氧树脂、憎水型固化剂、改性nano-SiO2制备了一种能在水下固化的弹性密封材料,其最佳配方体系为:100 phr MS-1086T弹性环氧树脂、80 phr憎水型固化剂、10%改性nano-SiO2。采用万能材料试验机、动态力学热分析(DMA)和扫描电镜对密封胶材料进行了研究。结果表明,随着固化剂含量的增加,密封胶的断裂伸长率由99.50%增加到173.10%,拉伸强度由4.80 MPa减小到1.75 MPa,拉伸剪切强度由7.02 MPa减小到2.98 MPa。DMA结果表明,nano-SiO2可使材料的玻璃化转变温度(Tg)升高到70.55 ℃,改性nano-SiO2可使材料的Tg降低到8.36 ℃;模拟实验结果表明,该密封胶有良好的密封性能,同时在80 ℃条件下,使用寿命可达22.70年。
英文摘要:
      The underwater curing with high elasticity and high bonding ability sealant was fabricated using elastic epoxy resin and water-repelling curing agent. The best system was 100 phr MS-1086T elastic epoxy resin, 80 phr water-repelling curing agent and 10% oil soluble nano-SiO2 (H-nano-SiO2). The property of sealant was investigated by universal material tester, DMA and scanning electron microscopy (SEM). The results indicate that when the addition of curing agent increases, the strain increases from 99.50% to 173.10%, the tensile strength and lap-shear strength reduce from 4.80 MPa to 1.75 MPa and 7.02 MPa to 2.98 MPa, respectively. The results of DMA indicate that Tg rises up to 70.55 ℃ with the increase of nano-SiO2 content, and Tg decreases to 8.36 ℃ with the increase of H-nano-SiO2 content. The simulation experiment shows that the system has good performance of splicing flexible riser at 80 ℃ and the working life is about 22.70 year.
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