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PP/POE共混物性能分析 总被引:6,自引:0,他引:6
杨柳 《现代塑料加工应用》2004,16(4):21-24
对聚丙烯(PP)和聚烯烃弹性体(POE)共混来增韧PP的效果进行研究,通过差示扫描量热计分析了共混物熔点、结晶温度及结晶焙的变化,利用广角X射线衍射仪、透射电镜分别分析了共混物PP晶面间距和共混物中POE的粒径大小和分布。得到PP和POE不同配比共混物性能变化规律。结果也表明,POE增韧PP与POE的添加量粒径大小及分布有密切关系。 相似文献
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首先研究了不同含量的纳米SiO2对聚丙烯(PP)力学性能的影响,通过综合分析选出最佳配方。还比较了马来酸酐接枝PP(PP-g-MAH)、马来酸酐接枝乙烯-辛烯共聚物(POE-g-MAH)、马来酸酐接枝PE(PE-g-MAH)对SiO2/PP共混体系力学性能和流动性的影响;最后研究了未接枝POE和POE-g-MAH的配比对SiO2/PP共混体系力学性能的影响。结果表明,SiO2质量分数为8%时混合体系性能较佳;单纯添加接枝POE比添加POE/POE-g-MAH的增韧效果更好,当POE和POE-g-MAH同时使用时,控制一定比例能使二者在增韧上具有协同作用。 相似文献
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为提高剑麻(SF)增强聚丙烯(PP)复合材料的韧性,分别采取乙烯-辛烯共聚物(POE)和马来酸酐接枝POE(POE-g-MAH)二种弹性体对其进行增韧改性;研究了弹性体和纤维用量的变化对SF/PP/弹性体三元复合体系力学性能的影响及其内在原因。结果表明:POE和POE-g-MAH对剑麻增强聚丙烯复合材料均有良好的增韧效果;仅从增韧效果而言,在弹性体用量较低阶段POE优于POE-g-MAH,但当弹性体增至30%以后,POE-g-MAH则好于POE;在拉伸强度、拉伸模量、弯曲强度及弯曲模量方面,POE-g-MAH均比POE效果更好。 相似文献
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PP/共聚PP/POE汽车保险杠专用料的研制 总被引:6,自引:3,他引:6
研制了PP/共聚PP/聚烯烃弹性体(POE)汽车保险杠专用料,介绍了POE的结构特点,探讨了POE及共聚PP含量对PP力学等性能的影响。结果表明,POE对PP的增韧优于(乙烯/丙烯/二烯)共聚物(EPDM),共聚PP在PP/共聚PP/POE体系中也起到增韧作用,该共混料可以满足汽车保险杠性能的要求。 相似文献
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利用熔融共混挤出方法制备了聚烯烃热塑性弹性体乙烯-辛烯共聚物(POE)/纳米二氧化硅(nano-SiO2)协同增韧增强聚丙烯(PP)三元复合材料(PP/POE/nano-SiO2)。通过冲击实验、拉伸实验、熔融结晶分析和热失重实验研究了POE与nano-SiO2的协同作用、nano-SiO2的含量对复合材料力学性能、熔融结晶行为和热学性能的影响。研究结果表明,POE与nano-SiO2的协同增韧明显优于POE单独对PP的增韧,nano-SiO2还体现出明显的增强作用。当nano-SiO2的质量分数为2%时,复合材料的室温冲击强度达最大值,其较PP/POE提高了72.6%,而在-35℃下较PP/POE的提高了200%。当nanoSiO2的质量分数为4%时,复合材料的室温拉伸强度达最大值,其较PP/POE增大了38.9%。熔融结晶分析表明,添加nano-SiO2导致复合材料的结晶度增大。热学性能分析表明,nano-SiO2的加入使PP/POE/nano-SiO2三元复合材料的热稳定性提高。 相似文献
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Studies on the use of polyolefin elastomer (POE) and high density polyethylene (HDPE) for toughening polypropylene (PP) to meet the demands of automobile bumpers were conducted. The effect of the basic resin, POE and the influences of the POE amount and HDPE doses on the mechanical properties of the blended composites were discussed. The morphology of impact fracture sections were characterized by scanning electron microscopy (SEM) while the crystalline properties were investigated by DSC. The effect of the composites’ morphology on mechanical properties was also discussed. Results showed that POE could improve the impact strength of PP while the use of HDPE had obvious effects on synergistic toughening. SEM images and DSC data analysis testified to the relationship between morphology, crystallinity and the mechanical properties. 相似文献
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利用双螺杆挤出机,采用聚乙烯-辛烯弹性体(POE)、聚乙烯-辛烯弹性体接技马来酸酐(POE-g-MAH)以及聚丙烯(PP)作为增韧剂与聚对苯二甲酸丁二醇酯(PBT)进行熔融共混,研究了不同增韧剂POE、POE-g-MAH和POE-PP对PBT共混物的力学性能、相容性和熔融结晶行为的影响。通过拉伸、冲击、熔体质量流动速率、硬度等性能测试以及红外光谱、X射线衍射仪(XRD)、差示扫描量热仪(DSC)等综合测试。结果表明,加入增韧剂对PBT具有良好的增韧效果,其中以PBT/POE/PP的增韧效果最明显。当PBT∶POE∶PP质量比为7∶3∶1时,共混物的缺口冲击强度增加8倍,红外表征显示,增韧改性可提高PBT的相容性,XRD测试表明,增韧剂对PBT复合材料的晶体结构没有影响,通过熔融增韧,提高其力学性能和加工性能。DSC图显示,增韧剂的加入可使共混物的结晶度降低。扫描电镜(SEM)表明,增韧剂的加入增加界面了结合力,提高了共混体系相容性。 相似文献
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The synergistic toughening effect of nucleating agent (NA) and ethylene–octene copolymer (POE) on polypropylene was studied in the present work. Two different nucleating agents, such as α-form nucleating agent 1,3 : 2,4-bis (3,4-dimethylbenzylidene) sorbitol (DMDBS, Millad 3988) and β-form nucleating agent aryl amides compounds (TMB-5), were selected to blend with PP or PP/POE blends, respectively. The results show that PP containing 0.5–0.25 wt % DMDBS or 0.5–0.25 wt % TMB-5 has relatively low impact strength. For PP/POE blends, although the impact strength increases gradually with the increasing of POE content, high content of POE is needed to obtain the available PP toughness. However, once nucleating agent and POE are simultaneously added into PP, PP/POE/NA blends show great improvement of toughness even at low POE content. Furthermore, the synergistic toughening effect of POE/TMB-5 is more apparent than that of POE/DMDBS. SEM results show that whether DMDBS or TMB-5 has no apparent effect on the morphologies of POE in the PP/POE/NA blends. Further investigations using DSC and POM indicate that both DMDBS and TMB-5 induce the apparent enhancement of the crystallization temperature of PP and the sharp decrease of spherulites size of PP in the PP/POE/NA blends. The possible synergistic toughening mechanism is discussed in the work. © 2008 Wiley Periodicals, Inc. J Appl Polym Sci, 2008 相似文献
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透明聚丙烯材料低温增韧的研究 总被引:1,自引:0,他引:1
用(乙烯/辛烯)共聚物(POE)对透明聚丙烯(PP)进行了增韧改性实验。探讨了POE用量对POE改性PP材料常温和低温力学性能的影响。通过扫描电镜(SEM)观察试样冲击断面形貌,研究了改性PP的形态结构与材料性能的关系,进一步探讨了POE低温增韧透明PP的机理。结果表明,POE能大幅度改善材料的常温和低温冲击韧性;SEM分析表明,POE改性PP材料的断面有明显的屈服产生;制得的透明PP材料具有好的低温韧性,可在低温环境下使用。 相似文献
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用聚烯烃弹性体(POE)代替传统的弹性体,对聚丙烯(PP)增韧改性,探讨了基体树脂、POE、HDPE、滑石粉、纳米CaCO3以及加工助剂EBS的用量对共混体系力学性能和流动性的影响.并通过扫描电镜观察冲击断面,研究共混物的形态结构.结果表明,POE能大幅度的改善材料的冲击韧性,HDPE和POE具有协同增韧效应,加工助剂EBS能改善PP共混材料的流动性,制得的PP改性材料具有高韧性和离流动性,可用于制造汽车装饰件. 相似文献