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硫化体系对动态硫化EPDM/PP热塑性弹性体性能的影响 总被引:4,自引:1,他引:4
比较了三种硫化体系对动态硫化EPDM/PP热塑性弹性体力学性能及加工性能的影响及其应用前景,结果表明:酚醛树脂硫化体系最具有发展潜力。并介绍了国内外动态硫化EPDM/PP热塑性弹性体硫化体系的新进展 相似文献
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本文主要研究了动态硫化EPDM/PP热塑性弹性体电缆料配方,结果表明:由过氧化物交联体系制得的EPDM/PP热塑性弹性体已具备了较好的综合性能。 相似文献
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低硬度POE/PP动态硫化胶的制备与性能研究 总被引:2,自引:0,他引:2
采用动态硫化法制备了POE/PP热塑性弹性体,运用正交设计方法系统研究了POE/PP树脂类型及用量比、交联剂类型及用量、助交联剂类型及用量、加工工艺条件等对POE/PP动态硫化胶性能的影响规律。结果表明,POE/PP用量比、加工工艺和捏合温度是影响材料性能的关键因素;当POE/PP用量比为70/30、捏合温度为240℃时,所得低硬度POE/PP共混型热塑性弹性体的性能最佳,其拉伸强度为4.54MPa,断裂伸长率可迭1023%,且加工流动性远优于EPDM/PP型动态硫化胶。 相似文献
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本文综合地介绍了投料顺序、共混时间、共混温度、剪切速率以及制备设备等工艺因素对动态硫化EPDM/PP热塑性弹性体性能的影响。 相似文献
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动态全硫化EPDM/PP共混型热塑性弹性体制备工艺研究 总被引:5,自引:1,他引:4
对EPDM/PP 共混型热塑性弹性体的产生和发展,作了简单回顾,介绍了动态全硫化EPDM/PP 共混型热塑性弹性体的制备原则,重点讨论了这类热塑性弹性体的制备工艺。 相似文献
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The morphology and dynamic viscoelastic properties of isotactic polypropylene (PP) blended with oil-free/oil-extended ethylene–propylene–diene (EPDM) rubbers were studied. Unvulcanized and dynamically vulcanized blends with the compositions PP/EPDM = 50/50 and = 30/70 were investigated. The morphology was observed by phase contrasted atomic force microscopy. The dynamic viscoelastic properties were determined with a rheometer of plate–plate configuration. It was shown that the rheological behavior was strongly affected by both the composition and the morphology of the blends. Significant improvement in the flowability of the dynamically vulcanized blends was observed when oil-extended EPDM was used instead of the oil-free version. It was demonstrated that the rheological properties are mostly controlled by the elastomer phase at low frequencies, while in the high-frequency range the influence of PP becomes dominant. The peculiarities in the rheological behavior of the thermoplastic elastomers (uncured blends, TPE) and thermoplastic dynamic vulcanizates (TPV, dynamically cured blends) containing oil-extended EPDMs were traced to a limited compatibility between the PP and EPDM components in the melt. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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采用动态硫化的方法,在双螺杆挤出机中制备了聚丙烯(PP)/三元乙丙橡胶(EPDM)热塑性弹性体,研究了挤出反应温度与螺杆转速提供的剪切应力对动态硫化PP/EPDM热塑性弹性体性能的影响。结果表明,适当提高挤出反应温度或螺杆转速可提高PP/EPDM热塑性弹性体的拉伸强度、拉断伸长率和凝胶含量,当挤出反应温度为200℃、螺杆转速为600 r/min时,热塑性弹性体的综合拉伸性能最好,拉伸强度为19.87 MPa,拉断伸长率为527.3%,凝胶含量为54.69%。高螺杆转速提供的高剪切应力可在一定程度上提高PP/EPDM热塑性弹性体的熔融温度。 相似文献