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Linear Expansion Coefficient of Epoxy Resin Potting Materials Measured by DMA
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Minmin ZHENG, Yue SUN, Tingting CHEN, Bing SHEN, Guoming WU
Insulating Materials | 2021, 54(9) : 92 - 96
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Insulating Materials | 2021, 54(9): 92-96
• Test and Analysis •
Linear Expansion Coefficient of Epoxy Resin Potting Materials Measured by DMA
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Minmin ZHENG, Yue SUN, Tingting CHEN, Bing SHEN, Guoming WU
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  • Zhejiang Rongtai Technical Industry Co., Ltd., Jiaxing 314007, China
Published: 2021-09-20 doi: 10.16790/j.cnki.1009-9239.im.2021.09.015
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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.

epoxy resin  /  linear expansion coefficient  /  DMA
Minmin ZHENG, Yue SUN, Tingting CHEN, Bing SHEN, Guoming WU. Linear Expansion Coefficient of Epoxy Resin Potting Materials Measured by DMA[J]. Insulating Materials, 2021 , 54 (9) : 92 -96 . DOI: 10.16790/j.cnki.1009-9239.im.2021.09.015
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doi: 10.16790/j.cnki.1009-9239.im.2021.09.015
  • Receive Date：2020-12-08
  • Online Date：2026-03-20
  • Published：2021-09-20
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  • Received：2020-12-08
  • Revised：2021-03-04
Affiliations
    Zhejiang Rongtai Technical Industry Co., Ltd., Jiaxing 314007, China
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https://castjournals.cast.org.cn/joweb/jycl/EN/10.16790/j.cnki.1009-9239.im.2021.09.015
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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