Article(id=1193556934847594894, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1193556932167431095, articleNumber=null, orderNo=null, doi=10.16790/j.cnki.1009-9239.im.2025.04.006, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=research-article, receivedDate=1713369600000, receivedDateStr=2024-04-18, revisedDate=1717257600000, revisedDateStr=2024-06-02, acceptedDate=null, acceptedDateStr=null, onlineDate=1762495748482, onlineDateStr=2025-11-07, pubDate=1745078400000, pubDateStr=2025-04-20, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1762495748482, onlineIssueDateStr=2025-11-07, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1762495748482, creator=13701087609, updateTime=1762495748482, updator=13701087609, issue=Issue{id=1193556932167431095, tenantId=1146029695717560320, journalId=1149653034449285133, year='2025', volume='58', issue='4', pageStart='1', pageEnd='144', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1762495747843, creator=13701087609, updateTime=1762498255746, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1193567451108573868, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1193556932167431095, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1193567451112768173, tenantId=1146029695717560320, journalId=1149653034449285133, issueId=1193556932167431095, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=37, endPage=44, ext={EN=ArticleExt(id=1193556935086670226, articleId=1193556934847594894, tenantId=1146029695717560320, journalId=1149653034449285133, language=EN, title=Research on structure and performance of polypropylene resin for DC capacitors, columnId=1190369066675179686, journalTitle=Insulating Materials, columnName=Material Research, runingTitle=null, highlight=null, articleAbstract=
High temperature liquid nuclear magnetic resonance (13CNMR), gel permeation chromatography (GPC), and differential scanning calorimetry (DSC) were used to study three kinds of polypropylene resins for DC capacitors at home and abroad with different temperature resistance grades, and analyze the effect of microstructure on electrical properties. The results show that the isotactic index, intermolecular chain defect distribution, and molecular weight characteristics jointly affect the crystallization characteristics of polypropylene, and thus affect the final high temperature dielectric properties of materials. The isotactic index of 5 units of imported polypropylene resin is greater than 97%, and the intermolecular chain stereodefect distribution is narrow (I=1.075), the weight average molecular weight is higher and the molecular weight distribution index is larger (PDI>5.6), showing excellent high temperature insulation properties (the electric strength α=533 kV/mm). While the molecular weight distribution of domestic polypropylene resin is narrow (PDI<5), the weight average molecular weight is lower, the isotactic index of 5 units is less than 97%, and the intermolecular chain stereodefect distribution is wider (I=1.106), which leads to its poor high temperature insulation performance and low electric strength (α=497 kV/mm).
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本文采用高温液体核磁(13CNMR)、凝胶渗透色谱(GPC)、差示扫描量热(DSC)法研究国内外3种不同耐温等级的直流电容器专用聚丙烯树脂,分析材料微观结构对电学性能的影响。结果表明:等规指数、分子链间缺陷分布和分子量特征共同影响聚丙烯的结晶特性,进而影响材料最终的高温介电性能。进口聚丙烯树脂的5单元等规指数大于97%,分子链间立构缺陷分布窄(I=1.075),重均分子量较高且分子量分布指数较大(PDI>5.6),表现出优异的高温绝缘性能(电气强度α=533 kV/mm)。而国产聚丙烯树脂的分子量分布窄(PDI<5),重均分子量较低,5单元等规指数小于97%以及分子链间立构缺陷分布较宽(I=1.106),进而导致其高温绝缘性能较差,电气强度较低(α=497 kV/mm)。
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苏尧天(1990-),男(汉族),河北保定人,工程师,博士,主要从事绝缘电介质材料的研究工作;
邢照亮(1988-),男(汉族),山东临沂人,高级工程师,主要从事绝缘电介质材料的研究工作。
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苏尧天(1990-),男(汉族),河北保定人,工程师,博士,主要从事绝缘电介质材料的研究工作;
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苏尧天(1990-),男(汉族),河北保定人,工程师,博士,主要从事绝缘电介质材料的研究工作;
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1 中国电力科学研究院有限公司 先进输电技术国家重点实验室,北京 102209)]), AuthorCompany(id=1195072077792288774, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, xref=2, ext=[AuthorCompanyExt(id=1195072077800677383, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, companyId=1195072077792288774, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=
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2 国家电网有限公司,北京 100032)])], figs=[ArticleFig(id=1195072081151926322, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Fig.1, caption=
13CNMR of different samples, figureFileSmall=PEvURvp2tpSefnGnZ6rCvg==, figureFileBig=RPX6EmYQ3/IO3OGojfnH5A==, tableContent=null), ArticleFig(id=1195072081244201011, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=图1, caption=
不同样品的13CNMR, figureFileSmall=PEvURvp2tpSefnGnZ6rCvg==, figureFileBig=RPX6EmYQ3/IO3OGojfnH5A==, tableContent=null), ArticleFig(id=1195072081336475700, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Fig.2, caption=
GPC curves of different samples, figureFileSmall=EJVBgK46+YB4bmrpjxup2w==, figureFileBig=f6OBUL8xiY7qFt0a/wslqw==, tableContent=null), ArticleFig(id=1195072081391001653, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=图2, caption=
不同样品的GPC曲线, figureFileSmall=EJVBgK46+YB4bmrpjxup2w==, figureFileBig=f6OBUL8xiY7qFt0a/wslqw==, tableContent=null), ArticleFig(id=1195072081445527606, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Fig.3, caption=
DSC curves of different samples, figureFileSmall=6xGtfKAHJp5P5Yg1GdBr/Q==, figureFileBig=Fdm+lCI0zNPnI0jkDVC02g==, tableContent=null), ArticleFig(id=1195072081537802295, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=图3, caption=
不同样品的DSC曲线, figureFileSmall=6xGtfKAHJp5P5Yg1GdBr/Q==, figureFileBig=Fdm+lCI0zNPnI0jkDVC02g==, tableContent=null), ArticleFig(id=1195072081600716856, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Fig.4, caption=
DSC curves of different samples after SSA procedure, figureFileSmall=AvCcHu6rNi6looXEvkPTRg==, figureFileBig=p4YvDVSyxcA1lqnOS9qPpQ==, tableContent=null), ArticleFig(id=1195072081726545977, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=图4, caption=
热分级后不同样品的DSC曲线, figureFileSmall=AvCcHu6rNi6looXEvkPTRg==, figureFileBig=p4YvDVSyxcA1lqnOS9qPpQ==, tableContent=null), ArticleFig(id=1195072081818820666, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Fig.5, caption=
The crystal morphology of different samples at 110℃, figureFileSmall=qPT6jBdsJPv9kTbGXVaQTw==, figureFileBig=FrQN3m/5VNpg0Ct2nK9kJA==, tableContent=null), ArticleFig(id=1195072081873346619, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=图5, caption=
不同样品在110℃时的结晶形貌, figureFileSmall=qPT6jBdsJPv9kTbGXVaQTw==, figureFileBig=FrQN3m/5VNpg0Ct2nK9kJA==, tableContent=null), ArticleFig(id=1195072081944649788, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Fig.6, caption=
Electrical properties of different samples at 85℃, figureFileSmall=//fOWay14E8gxN1EnISCQw==, figureFileBig=TnSNoiPSxG/SvXy8eNcLRw==, tableContent=null), ArticleFig(id=1195072082045313085, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=图6, caption=
不同样品在85℃下的电学性能, figureFileSmall=//fOWay14E8gxN1EnISCQw==, figureFileBig=TnSNoiPSxG/SvXy8eNcLRw==, tableContent=null), ArticleFig(id=1195072082112421950, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Fig.7, caption=
Electric strength of different samples at 85℃, figureFileSmall=jVwgeuvkVnt1UWelzSOuxg==, figureFileBig=c1AFy8fBVxdQZWu8Yq+dHA==, tableContent=null), ArticleFig(id=1195072082225668159, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=图7, caption=
不同样品在85℃下的电气强度, figureFileSmall=jVwgeuvkVnt1UWelzSOuxg==, figureFileBig=c1AFy8fBVxdQZWu8Yq+dHA==, tableContent=null), ArticleFig(id=1195072082376663104, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=null, caption=
Table 1 Characteristic 13CNMR peaks of PP resin, figureFileSmall=null, figureFileBig=null, tableContent=
| 等规3单元特征峰 | 等规5单元特征峰 | 化学位移/×10-6 |
| mm | mmmm | 21.78 |
| mmmr | 21.55 |
| rmmr | 21.33 |
| mr | mmrr | 21.01 |
| rmrr | 20.85 |
| mrmr | 20.71 |
| rr | rrrr | 20.31 |
| rrrm | 20.17 |
| mrrm | 20.04 |
), ArticleFig(id=1195072082435383361, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=表1, caption=
聚丙烯树脂核磁13CNMR特征峰
, figureFileSmall=null, figureFileBig=null, tableContent=
| 等规3单元特征峰 | 等规5单元特征峰 | 化学位移/×10-6 |
| mm | mmmm | 21.78 |
| mmmr | 21.55 |
| rmmr | 21.33 |
| mr | mmrr | 21.01 |
| rmrr | 20.85 |
| mrmr | 20.71 |
| rr | rrrr | 20.31 |
| rrrm | 20.17 |
| mrrm | 20.04 |
), ArticleFig(id=1195072082485715010, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Table 2, caption=
Isotactic index calculation results, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | S(mmmm) | S(mmmr) | S(mrrm) | 等规5单元组分含量/% | 等规3单元组分含量/% |
| 1 | 128.42 | 2.34 | 1 | 98.0 | 98.9 |
| 2 | 90.32 | 0.83 | 1 | 97.5 | 99.2 |
| 3 | 71.62 | 1.45 | 1 | 96.7 | 98.6 |
), ArticleFig(id=1195072082548629571, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=表2, caption=
等规指数计算结果
, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | S(mmmm) | S(mmmr) | S(mrrm) | 等规5单元组分含量/% | 等规3单元组分含量/% |
| 1 | 128.42 | 2.34 | 1 | 98.0 | 98.9 |
| 2 | 90.32 | 0.83 | 1 | 97.5 | 99.2 |
| 3 | 71.62 | 1.45 | 1 | 96.7 | 98.6 |
), ArticleFig(id=1195072082670264388, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Table 3, caption=
Characteristic molecular weight of different samples, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | M n | M w | PDI |
| 1 | 70 878 | 470 420 | 6.64 |
| 2 | 81 894 | 461 227 | 5.63 |
| 3 | 100 579 | 439 514 | 4.37 |
), ArticleFig(id=1195072082737373253, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=表3, caption=
不同样品特征分子量
, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | M n | M w | PDI |
| 1 | 70 878 | 470 420 | 6.64 |
| 2 | 81 894 | 461 227 | 5.63 |
| 3 | 100 579 | 439 514 | 4.37 |
), ArticleFig(id=1195072082838036550, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Table 4, caption=
Crystalline parameters of different samples, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | 熔点/℃ | 结晶度/% |
| 1 | 165.8 | 37.9 |
| 2 | 170.8 | 47.1 |
| 3 | 170.2 | 45.6 |
), ArticleFig(id=1195072082926116935, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=表4, caption=
不同试样的结晶参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | 熔点/℃ | 结晶度/% |
| 1 | 165.8 | 37.9 |
| 2 | 170.8 | 47.1 |
| 3 | 170.2 | 45.6 |
), ArticleFig(id=1195072083014197320, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=EN, label=Table 5, caption=
Crystallization parameters of samples after SSA procedures, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | 熔融峰1温度/℃ | 熔融峰2温度/℃ | 结晶度/% | 面积比S(熔融峰1∶2) | L N | L W | I |
| 1 | 165.0 | 174.5 | 52.2 | 0.71 | 15.7 | 16.7 | 1.063 |
| 2 | 173.8 | 180.0 | 66.0 | 0.93 | 26.8 | 28.8 | 1.075 |
| 3 | 174.5 | 180.1 | 63.4 | 0.98 | 28.3 | 31.3 | 1.106 |
), ArticleFig(id=1195072083219718217, tenantId=1146029695717560320, journalId=1149653034449285133, articleId=1193556934847594894, language=CN, label=表5, caption=
不同样品热分级后的结晶参数
, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品 | 熔融峰1温度/℃ | 熔融峰2温度/℃ | 结晶度/% | 面积比S(熔融峰1∶2) | L N | L W | I |
| 1 | 165.0 | 174.5 | 52.2 | 0.71 | 15.7 | 16.7 | 1.063 |
| 2 | 173.8 | 180.0 | 66.0 | 0.93 | 26.8 | 28.8 | 1.075 |
| 3 | 174.5 | 180.1 | 63.4 | 0.98 | 28.3 | 31.3 | 1.106 |
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