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High performance glass fiber reinforced epoxy resin composites were prepared by vacuum impregnation and autoclave molding using multifuctional AG80 epoxy resin and phenolic epoxy resin as composite epoxy resin matrix, composite diaminodiphenyl sulfone (DDS) as curing agent and 2-ethyl-4-methylimidazole as accelerator. The results show that the prepared high performance epoxy resin composites have excellent high temperature and high humidity resistance. When the content of DDS is 35 phr, the tensile strength, compressive strength, and bending strength of epoxy resin composites reach 385, 549 and 407 MPa at room temperature, respectively, the insulation resistance reaches 1.0×109 Ω, and the bending strength reaches 210 MPa at 200℃. In addition, the epoxy resin composite still maintains good mechanical properties and insulating properties after high temperature and high pressure hygrothermal test at 205℃ and 140 MPa, which can meet the application requirements of petroleum logging tools in high temperature and high humidity environment.
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以多功能AG80环氧树脂和酚醛环氧树脂为复合型环氧树脂基体,以复配二氨基二苯砜(DDS)为固化剂,2-乙基-4-甲基咪唑为促进剂,采用真空浸胶和热压罐成型工艺制得高性能玻璃纤维增强环氧树脂复合材料。结果表明:制备的高性能环氧树脂复合材料具有优越的耐高温高湿热性能。当复配DDS含量为35份时,环氧树脂复合材料的室温拉伸强度、压缩强度和弯曲强度分别达到385、549、407 MPa,绝缘电阻达到1.0×109 Ω,并且在200℃高温条件下弯曲强度达到210 MPa。此外,环氧树脂复合材料在205℃和140 MPa高温高压湿热试验后依然保持良好的力学性能和绝缘性能,能够满足石油测井仪器在高温高湿热环境下的使用要求。
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吴亚民(1963-),男(汉族),陕西西安人,工程师,主要从事先进复合材料的研发、生产与应用的研究。
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吴亚民(1963-),男(汉族),陕西西安人,工程师,主要从事先进复合材料的研发、生产与应用的研究。
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吴亚民(1963-),男(汉族),陕西西安人,工程师,主要从事先进复合材料的研发、生产与应用的研究。
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Apparent morphology of epoxy resin composites before and after high temperature and high pressure hygrothermal test, figureFileSmall=eRgs7zMDKmkRLVLWZlgCqQ==, figureFileBig=ASvLlPkJgXDew8NTfhhafQ==, tableContent=null), ArticleFig(id=1210527791561437889, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210201269399056542, language=CN, label=图1, caption=
环氧树脂复合材料高温高压湿热试验前后的表观形貌, figureFileSmall=eRgs7zMDKmkRLVLWZlgCqQ==, figureFileBig=ASvLlPkJgXDew8NTfhhafQ==, tableContent=null), ArticleFig(id=1210527791653712580, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210201269399056542, language=EN, label=Tab.1, caption=
Room temperature viscosity and high temperature gel time of epoxy resin composites, figureFileSmall=null, figureFileBig=null, tableContent=
| 性能 | 复配DDS/份 |
|---|
| 0 | 15 | 25 | 35 | 45 |
|---|
| 室温黏度/(mPa·s) | 5 400 | 6 300 | 7 500 | 8 900 | 11 500 |
| 高温凝胶时间(140℃)/min | — | 26 | 15 | 11 | 9.5 |
), ArticleFig(id=1210527792891032264, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210201269399056542, language=CN, label=表1, caption=
环氧树脂复合材料的室温黏度与高温凝胶时间
, figureFileSmall=null, figureFileBig=null, tableContent=
| 性能 | 复配DDS/份 |
|---|
| 0 | 15 | 25 | 35 | 45 |
|---|
| 室温黏度/(mPa·s) | 5 400 | 6 300 | 7 500 | 8 900 | 11 500 |
| 高温凝胶时间(140℃)/min | — | 26 | 15 | 11 | 9.5 |
), ArticleFig(id=1210527792974918349, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1210201269399056542, language=EN, label=Tab.2, caption=
Mechanical and electrical properties of high-performance epoxy resin composites, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 条件 | 复配DDS/份 | 对比试样 |
|---|
| 15 | 25 | 35 |
|---|
| 凝胶含量/% | 室温 | 70 | 85 | 98 | 63 |
| 拉伸强度/MPa | 室温 | 345 | 360 | 385 | 290 |
| 压缩强度/MPa | 室温 | 510 | 530 | 549 | 465 |
| 弯曲强度/MPa | 室温 | 380 | 397 | 407 | 350 |
| 100℃ | 360 | 365 | 371 | 258 |
| 150℃ | 100 | 220 | 303 | 64 |
| 200℃ | 80 | 150 | 210 | 16 |
| 绝缘电阻/(×109 Ω) | 室温 | 0.8 | 0.9 | 1.0 | 0.5 |
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| 项目 | 条件 | 复配DDS/份 | 对比试样 |
|---|
| 15 | 25 | 35 |
|---|
| 凝胶含量/% | 室温 | 70 | 85 | 98 | 63 |
| 拉伸强度/MPa | 室温 | 345 | 360 | 385 | 290 |
| 压缩强度/MPa | 室温 | 510 | 530 | 549 | 465 |
| 弯曲强度/MPa | 室温 | 380 | 397 | 407 | 350 |
| 100℃ | 360 | 365 | 371 | 258 |
| 150℃ | 100 | 220 | 303 | 64 |
| 200℃ | 80 | 150 | 210 | 16 |
| 绝缘电阻/(×109 Ω) | 室温 | 0.8 | 0.9 | 1.0 | 0.5 |
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Mechanical and electrical properties of high-performance epoxy resin composites after high temperature and high pressure hygrothermal test, figureFileSmall=null, figureFileBig=null, tableContent=
| 项目 | 复配DDS/份 | 对比试样 |
|---|
| 15 | 25 | 35 |
|---|
| 拉伸强度/MPa | 130 | 185 | 230 | 40 |
| 弯曲强度(室温)/MPa | 120 | 155 | 180 | 11 |
| 压缩强度/MPa | 285 | 310 | 350 | 20 |
| 绝缘电阻/(×109 Ω) | 0.03 | 0.15 | 0.50 | 0.000 1 |
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高温高压湿热试验后环氧树脂复合材料的力学性能与电气性能
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| 项目 | 复配DDS/份 | 对比试样 |
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| 15 | 25 | 35 |
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| 拉伸强度/MPa | 130 | 185 | 230 | 40 |
| 弯曲强度(室温)/MPa | 120 | 155 | 180 | 11 |
| 压缩强度/MPa | 285 | 310 | 350 | 20 |
| 绝缘电阻/(×109 Ω) | 0.03 | 0.15 | 0.50 | 0.000 1 |
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