乙烯咔唑接枝聚乙烯的空间电荷特性及力学性能

发布时间：2018-05-26 04:01

本文选题：聚乙烯 + 乙烯咔唑　；参考：《高分子材料科学与工程》2017年05期

【摘要】：为了研究聚乙烯材料的空间电荷特性及力学性能,采用熔融法制备乙烯咔唑(VK)接枝聚乙烯(VK-g-LDPE),并通过电声脉冲法、差热扫描量热法和拉伸试验对VK-g-LDPE的空间电荷分布、结晶度和拉伸性能进行了测试。结果表明,随着接枝率的增加,对VK-g-LDPE内部空间电荷的抑制效果呈现先增强后减弱的趋势;当接枝率为12.45%时,对VK-gLDPE材料空间电荷的抑制作用最好,试样的电荷密度最大值仅为0.31 C/m~3,比聚乙烯降低了95.87%;随着接枝率的增加,VK-g-LDPE的结晶度呈下降趋势;随着接枝率的增加,VK-g-LDPE的拉伸强度呈现先增大后降低的趋势,且当接枝率为13.02%时达到最大值14.2 N/mm~2;随着接枝率的增加,VK-g-LDPE的断裂伸长率和弹性模量呈现下降的趋势。
[Abstract]:In order to study the space charge characteristics and mechanical properties of polyethylene, vinyl carbazole (VK) grafted polyethylene (VK-g-LDPE) was prepared by melting method. The space charge distribution of VK-g-LDPE was investigated by electroacoustic pulse method, differential scanning calorimetry (DSC) and tensile test. The crystallinity and tensile properties were tested. The results showed that with the increase of grafting rate, the inhibition effect of space charge on VK-g-LDPE showed a tendency of first increasing and then weakening, and when the grafting rate was 12.45%, the inhibitory effect of space charge on VK-gLDPE was the best. The maximum charge density of the sample is only 0.31 C / m ~ (3), which is 95.87% lower than that of polyethylene, and the crystallinity of VK-g-LDPE decreases with the increase of grafting ratio, and the tensile strength of VK-g-LDPE increases first and then decreases with the increase of grafting ratio. When the grafting rate was 13.02, the maximum value was 14.2 N / mmm2, and the elongation at break and elastic modulus of VK-g-LDPE decreased with the increase of grafting rate.
【作者单位】：哈尔滨理工大学材料科学与工程学院;哈尔滨理工大学工程电介质及其应用教育部重点实验室;
【基金】：哈尔滨理工大学工程电介质及其应用教育部重点实验室开放课题(HUST201401X)
【分类号】：O632.12

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