| DIELECTRIC PROPERTIES OF 1, 2-POLYBUTADIENES |
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| 引用本文： | 倪少儒,余赋生,沈联芳,钱保功. DIELECTRIC PROPERTIES OF 1, 2-POLYBUTADIENES[J]. 高分子科学, 1987, 0(2): 120-124 |
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| 作者姓名： | 倪少儒 余赋生 沈联芳 钱保功 |
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| 作者单位： | Changchun Institute of Applied Chemistry Academia Sinica Changchun，Changchun Institute of Applied Chemistry Academia Sinica Changchun，Changchun Institute of Applied Chemistry Academia Sinica Changchun，Changchun Institute of Applied Chemistry Academia Sinica Changchun |
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| 摘 要： | The dielectric permittivity and loss tangent of 1,2-polybutadienes with different chain structures were determined as a function of temperature from-180℃ to 100℃ at different frequencies, and the frequency and structure dependence of the dielectric propertie of 1,2-polybutadienes have been investigated. It is found that a maximum of the permittivity occurs in the glass-transition region. The width of the glasstransition peak increases with increasing frequency while its height has little change. With a rise in the content of 1,2-units, the permittivity decreases and the height of the glass-transition peak slightly grows. A maximum of the width of the glass-transition peak appears when the content of 1,2-units is about 45%. Both the permittivity and dielectric loss drop down as the growth of the content of syndiotactic 1,2-units.
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| 收稿时间： | 1985-11-01 |
DIELECTRIC PROPERTIES OF 1, 2-POLYBUTADIENES |
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| NI Shaoru,YU Fusheng,SHEN Lianfang,QIAN Baogong. DIELECTRIC PROPERTIES OF 1, 2-POLYBUTADIENES[J]. Chinese Journal of Polymer Science, 1987, 0(2): 120-124 |
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| Authors: | NI Shaoru YU Fusheng SHEN Lianfang QIAN Baogong |
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| Affiliation: | Changchun Institute of Applied Chemistry Academia Sinica Changchun; Changchun Institute of Applied Chemistry Academia Sinica Changchun |
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| Abstract: | The dielectric permittivity and loss tangent of 1,2-polybutadienes with different chain structures were determined as a function of temperature from-180℃ to 100℃ at different frequencies, and the frequency and structure dependence of the dielectric propertie of 1,2-polybutadienes have been investigated. It is found that a maximum of the permittivity occurs in the glass-transition region. The width of the glasstransition peak increases with increasing frequency while its height has little change. With a rise in the content of 1,2-units,the permittivity decreases and the height of the glass-transition peak slightly grows.A maximum of the width of the glass-transition peak appears when the content of 1,2-units is about 45%.Both the permittivity and dielectric loss drop down as the growth of the content of syndiotactic 1,2-units. |
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| Keywords: | 1 2-polybutadiene Dielectric properties Permittivity Loss tangent |
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