聚丙烯/马来酸接枝聚丙烯镁离聚物复合材料的流变性能
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1.哈尔滨理工大学材料科学与化学工程学院,黑龙江 哈尔滨 150040;2.扬州龙达电工材料有限公司,江苏 扬州 225222

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Rheological Properties of PP/PP-g-MAMg Ionomer
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    摘要:

    将聚丙烯接枝马来酸酐(PP-g-MAH)与硬脂酸镁共混制备马来酸接枝PP镁离聚物(PP-g-MAMg),通过红外光谱与X射线光电子能谱进行表征,对PP-g-MAMg的介电性能、体积电阻率、击穿场强进行了分析研究。结果表明,随着Mg2+含量的增加,PP-g-MAMg的介电常数和介电损耗二者均先增大后减小,PP-g-MAMg的体积电阻率的变化表现为先升高后降低,击穿场强先减小后增大而后再减小。采用旋转流变仪对PP/PP-g-MAMg复合材料的流变性能进行研究。结果表明,加入PP-g-MAMg后,体系的储能模量和损耗模量与纯PP相比都有所提高,高频区比低频区更为明显;PP-g-MAMg的加入对PP的复合黏度影响较大,与纯PP比较, PP/PP-g-MAMg共混体系的复合黏度有明显的上升趋势。

    Abstract:

    PP-g-MAMg was prepared by blending polypropylene grafted maleic anhydride (PP-g-MAH) with magnesium stearate. The dielectric properties, volume resistivity and breakdown field strength of PP-g-MAMg ionomers were characterized by IR and XPS. The results show that with the increase of Mg2+ content, the dielectric constant and dielectric loss of PP-g-MAMg ionomers first increase and then decrease, and the volume resistivity of PP-g-MAMg ionomers first increases and then decreases, the breakdown field strength first decreases, then increases, and then decreases; the rheological properties of PP/PP-g-MAMg ionomer composites were studied by rotating rheometer. The results show that after adding PP-g-MAMg, the storage modulus("G" ^"''" )and loss modulus ("G" ^"''" ) of the system are improved compared with those of pure PP, and the high frequency region is more obvious than the low frequency region; the addition of PP-g-MAMg has a great influence on the composite viscosity of PP. Compared with pure PP, the composite viscosity of the PP/PP-g-MAMg system is higher(η^*) has an obvious upward trend.

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  • 收稿日期:2022-03-12
  • 最后修改日期:2022-07-20
  • 录用日期:2022-07-21
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