Article(id=1241799383264592180, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1241799375576437302, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2021.09.015, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1607356800000, receivedDateStr=2020-12-08, revisedDate=1614787200000, revisedDateStr=2021-03-04, acceptedDate=null, acceptedDateStr=null, onlineDate=1773997644486, onlineDateStr=2026-03-20, pubDate=1632067200000, pubDateStr=2021-09-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1773997644486, onlineIssueDateStr=2026-03-20, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1773997644486, creator=13701087609, updateTime=1773997644486, updator=13701087609, issue=Issue{id=1241799375576437302, tenantId=1146029695717560320, journalId=1149653034449285133, year='2021', volume='54', issue='9', pageStart='1', pageEnd='109', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1773997642653, creator=13701087609, updateTime=1773997716115, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1241799683752919920, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1241799375576437302, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1241799683752919921, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1241799375576437302, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=92, endPage=96, ext={EN=ArticleExt(id=1241799384061509987, articleId=1241799383264592180, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=Linear Expansion Coefficient of Epoxy Resin Potting Materials Measured by DMA, columnId=1192878364340924664, journalTitle=Insulating Materials, columnName=Test and Analysis, runingTitle=null, highlight=null, articleAbstract=
The linear expansion coefficient of cured E51 epoxy resin was tested by using the TMA mode of DMA, and the effects of curing agent types (methyltetrahydrophthalic anhydride (MeTHPA), 4,4-diaminodiphenylmethane (DDM), dicyandiamide (dicy)), and filler powder types and dosage on its linear expansion coefficient were analyzed. The results show that when T<Tg, the linear expansion coefficient of cured E51/Dicy is smaller than that of cured E51/MeTHPA and E51/DDM. When T>Tg, the linear expansion coefficient of cured E51/dicy is larger than that of cured E51/MeTHPA and E51/DDM. After filling SiO2, Al(OH)3, and Al2O3 respectively, the linear expansion coefficient of the epoxy composites are significantly lower than that of pure epoxy material, and the linear expansion coefficients of the epoxy composite filled with Al2O3 is the smallest. With the increase of inorganic filler content, the linear expansion coefficient of the epoxy composite decreases. However, when the mass fraction of inorganic fillers is 70%–80%, the linear expansion coefficient changes little with the change of filler content.
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采用DMA的TMA模式对E51环氧树脂固化物的线膨胀系数进行测试,分析固化剂种类(甲基四氢苯酐(MeTHPA)、4,4-二氨基二苯甲烷(DDM)、双氰胺(Dicy))、填充粉体种类及用量等因素对其线膨胀系数的影响。结果表明:当T<Tg时,E51/Dicy固化物的线膨胀系数小于E51/MeTHPA固化物和E51/DDM固化物;当T>Tg时,E51/Dicy固化物的线膨胀系数大于E51/MeTHPA固化物和E51/DDM固化物。分别填充SiO2、Al(OH)3和Al2O3后,环氧复合材料的线膨胀系数较纯环氧材料明显减小,且填充Al2O3的环氧复合材料线膨胀系数最小。同时环氧复合材料的线膨胀系数随无机填料填充量增加而增大,但当无机填料的质量分数达到70%~80%时,线膨胀系数随填充量的变化则较小。
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孙岳(1983-),女(汉族),吉林人,工程师,博士,主要从事高分子绝缘材料的研究。
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郑敏敏(1981-),男(汉族),浙江衢州人,高级工程师,主要从事高分子绝缘材料的研究。
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郑敏敏(1981-),男(汉族),浙江衢州人,高级工程师,主要从事高分子绝缘材料的研究。
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郑敏敏(1981-),男(汉族),浙江衢州人,高级工程师,主要从事高分子绝缘材料的研究。
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TMA spectra of epoxy composite under two temperature rising rates, figureFileSmall=dqjJIYx+s4xgGtVq7qxHFw==, figureFileBig=WD1XyomY1M40grj/J2gG3A==, tableContent=null), ArticleFig(id=1245084031449153938, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1241799383264592180, language=CN, label=图1, caption=
两种升温速率下环氧复合材料的TMA图, figureFileSmall=dqjJIYx+s4xgGtVq7qxHFw==, figureFileBig=WD1XyomY1M40grj/J2gG3A==, tableContent=null), ArticleFig(id=1245084031574983070, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1241799383264592180, language=EN, label=Fig.2, caption=
TMA spectra of epoxy resins, figureFileSmall=invf4ttaQZOadeA8qlp1Sw==, figureFileBig=A6rdCwHciwDAwqnxs2QVRA==, tableContent=null), ArticleFig(id=1245084031684034981, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1241799383264592180, language=CN, label=图2, caption=
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TMA spectra of epoxy composites filled with different inorganic powder, figureFileSmall=l91VfOLBnCfNMG7ULAfS+A==, figureFileBig=zTpwln9JUmvhdMKIIKpePQ==, tableContent=null), ArticleFig(id=1245084031864390064, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1241799383264592180, language=CN, label=图3, caption=
不同无机粉体填充环氧复合材料的TMA图, figureFileSmall=l91VfOLBnCfNMG7ULAfS+A==, figureFileBig=zTpwln9JUmvhdMKIIKpePQ==, tableContent=null), ArticleFig(id=1245084031969247668, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1241799383264592180, language=EN, label=Tab.1, caption=
Proportion, curing conditions, and linear expansion coefficient of different epoxy systems, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | 环氧树脂 | 固化剂 | 促进剂/溶剂 | 质量比 | 固化条件 | 线膨胀系数/(×10-6/K) |
|---|
| Tg-30℃<T<Tg-20℃ | Tg+20℃<T<Tg+30℃ |
|---|
| A1 | E51 | MeTHPA | DMP30 | 100∶85∶0.3 | 130℃/6 h | 33.0 | 176.9 |
| A2 | E51 | MeTHPA | DMP30 | 100∶85∶0.3 | 130℃/4 h | — | 163.1 |
| B | E51 | DDM | 苯甲醇 | 100∶30∶20 | 25℃/48 h | 37.2 | 170.2 |
| C | E51 | Dicy | UR300 | 100∶8∶1 | 140℃/2 h | 12.7 | 240.2 |
), ArticleFig(id=1245084032053133752, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1241799383264592180, language=CN, label=表1, caption=
不同环氧体系的配比、固化条件及线膨胀系数
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| 编号 | 环氧树脂 | 固化剂 | 促进剂/溶剂 | 质量比 | 固化条件 | 线膨胀系数/(×10-6/K) |
|---|
| Tg-30℃<T<Tg-20℃ | Tg+20℃<T<Tg+30℃ |
|---|
| A1 | E51 | MeTHPA | DMP30 | 100∶85∶0.3 | 130℃/6 h | 33.0 | 176.9 |
| A2 | E51 | MeTHPA | DMP30 | 100∶85∶0.3 | 130℃/4 h | — | 163.1 |
| B | E51 | DDM | 苯甲醇 | 100∶30∶20 | 25℃/48 h | 37.2 | 170.2 |
| C | E51 | Dicy | UR300 | 100∶8∶1 | 140℃/2 h | 12.7 | 240.2 |
), ArticleFig(id=1245084032141214144, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1241799383264592180, language=EN, label=Tab.2, caption=
Filler types and linear expansion coefficient of epoxy composites, figureFileSmall=null, figureFileBig=null, tableContent=
| 编号 | 灌封材料类型 | 填充粉体 | 粉体粒径/μm | 粉体质量分数/% | 线膨胀系数/(×10-6/K) |
|---|
| Tg-30℃<T<Tg-20℃ | Tg+20℃<T<Tg+30℃ |
|---|
| D | 常规型 | SiO2 | 15~25 | 60 | 24.7 | 107.6 |
| E | 阻燃型 | Al(OH)3 | 15~25 | 60 | 26.2 | 108.9 |
| F | 阻燃型 | Al(OH)3 | 15~25 | 70 | 18.8 | 102.2 |
| G | 导热型(1.0 W/(m·K)) | Al2O3 | 15~25 | 70 | 6.8 | 88.2 |
| H | 导热型(1.3 W/(m·K)) | Al2O3 | 15~25 | 80 | 7.7 | 81.5 |
), ArticleFig(id=1245084032262848969, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1241799383264592180, language=CN, label=表2, caption=
无机粉体种类及环氧复合材料的线膨胀系数
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| 编号 | 灌封材料类型 | 填充粉体 | 粉体粒径/μm | 粉体质量分数/% | 线膨胀系数/(×10-6/K) |
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| Tg-30℃<T<Tg-20℃ | Tg+20℃<T<Tg+30℃ |
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| D | 常规型 | SiO2 | 15~25 | 60 | 24.7 | 107.6 |
| E | 阻燃型 | Al(OH)3 | 15~25 | 60 | 26.2 | 108.9 |
| F | 阻燃型 | Al(OH)3 | 15~25 | 70 | 18.8 | 102.2 |
| G | 导热型(1.0 W/(m·K)) | Al2O3 | 15~25 | 70 | 6.8 | 88.2 |
| H | 导热型(1.3 W/(m·K)) | Al2O3 | 15~25 | 80 | 7.7 | 81.5 |
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