共查询到20条相似文献,搜索用时 78 毫秒
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用动态力学方法对酚醛树脂和环氧树脂的固化行为进行了表征,讨论了纤维取向对碳纤维增强环氧树脂粘弹行为的影响。 相似文献
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中温固化环氧树脂复合材料基体的研究 总被引:5,自引:1,他引:5
本文介绍一种环氧/硼胺树脂体系(EM体系),该体系在120~150℃固化,固化物具有较高的综合性能,而且工艺性良好,具有较长的室温储存期,可作为碳纤维复合材料的基体,对体系进行了DSC分析,给出了固化工艺。 相似文献
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《塑料科技》2017,(6):36-40
为了增强聚氯乙烯(PVC)基木塑复合材料的动态力学性能,加入氯化聚乙烯(CPE)对复合材料进行改性,并探究CPE对PVC基木塑复合材料性能的影响。采用动态力学分析仪(DMA)和维卡软化温度测试仪,对加入CPE的PVC/木粉复合材料进行测试,分析CPE对PVC/木粉复合材料动态力学性能及耐热性能的影响。结果表明:CPE的加入会对PVC/木粉复合材料的动态力学性能产生重要的影响,且CPE含量约为5份时,复合材料的动态力学性能最佳;但维卡软化温度、热变形温度测试结果显示,CPE的加入降低了PVC/木粉复合材料的耐热性,且随着CPE含量的增加,复合材料的耐热性逐渐减弱。 相似文献
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主要介绍了关于环氧树脂(EP)耐热改性方面的研究进展。讨论了影响环氧树脂耐热的影响因素,通过引入耐高温基团,使环氧树脂分子链结构发生改变,从而提高环氧树脂的耐热性能。并进行了总结展望。 相似文献
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在确定了氯代四官能环氧/DDS树脂体系成型工艺的基础上,对浇注体的力学性能、复合材料的力学性能和耐热性进行了分析。结果表明,固化工艺为130℃/1h+150℃/2h+175℃/2h时,浇铸体具有较好的力学性能,高温力学性能保持率和较高的玻璃化温度tg和热分解温度,产品性能与国外同类产品相当。 相似文献
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复合材料用高性能环氧树脂基体的新发展 总被引:3,自引:2,他引:3
本文简要地介绍了先进复合材料用高性能环氧树脂基体的新发展。为了满足高性能复合材料技术指标,近年来开发了许多种具有独特分子结构的环氧树脂。本文给出了部份这类新树脂的结构和力学性能,特别是在高湿热环境下的强度保持率。这对现代军用飞机使用的高性能环氧基复合材料的发展,具有特别重要的意义. 相似文献
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Ai-Jie Ma Weixing Chen Yonggang Hou Gai Zhang 《Polymer-Plastics Technology and Engineering》2013,52(9):916-920
The nanometer carbon black (CB) was employed to prepare epoxy resin/carbon black (EP/CB) composites by blending-casting method. The different modified methods of silicone coupling agent were used to improve the dispersion of CB in epoxy resin. The mechanical and thermal properties of EP/CB composites were investigated. Experimental results showed that the mechanical properties increased at first, but decreased with excessive addition of CB. When the mass fraction of CB was 2%, the mechanical properties were maximum. The use of modified CB significantly enhanced the mechanical properties of the composites. For given CB loading, the CB modified by pretreatment method displayed better dispersion in the epoxy resin than that of the direct mixing method. SEM observation revealed that the tensile fracture surface of the composite filled with 2 wt% modified CB held more microcracks than that of 5 wt% modified CB, and the formed microcracks could consume more energy of rupture, finally to have better tensile strength. DSC analysis showed that the glass transition temperature (Tg) of the composites increased with the increasing mass fraction of CB. 相似文献
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稻壳二氧化硅/环氧树脂纳米复合材料机械性能研究 总被引:1,自引:1,他引:0
将稻壳用10%的盐酸处理后在600℃焚烧得到纯度为99.3%的SiO_2,将SiO_2用偶联剂γ-氨丙基三乙氧基硅烷(KH550)改性后与环氧树脂(EP)复合,探讨了SiO_2质量分数在0~5%范围内复合材料的力学性能.研究结果显示:经硅烷偶联剂KH550改性后稻壳SiO_2粒子为无定形态,尺寸在30~50 nm且能显著提高环氧树脂的力学性能.当稻壳SiO_2质量分数为3%时,材料的拉伸性能以及弯曲性能的提高率最大,拉伸强度、拉伸模量、弯曲模量和弯曲强度的提高率分别为27.25%、6.54%、61.7%和24.56%.SEM研究结果显示:复合材料中SiO_2与基体树脂之间有较好的相容性. 相似文献
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A. A. Wazzan H. A. Al-Turaif A. F. Abdelkader 《Polymer-Plastics Technology and Engineering》2013,52(10):1155-1161
Submicron titanium dioxide (TiO2) was used in different weight fractions as a toughening agent for amine-cured epoxy resin. After the use of X-ray photoelectron spectroscopy (XPS), which confirmed that the TiO2 particles were evenly distributed in the cross-linked epoxy resin matrix, the composites were characterized by tensile and impact testing, followed by scanning electron microscopy of the fracture surfaces. The results indicated that the submicron TiO2 toughening particles markedly improved the mechanical properties of the cured epoxy resin compared to the untoughened epoxy resin. The optimal properties were achieved at a TiO2 concentration of 4 wt. %, at which point the toughness and the impact resistance values increased by 65% and 60%, respectively. The results also indicated that an increase in the amount of TiO2 causes a decrease in toughness. Stress whitening, out-of-plane flaking, and thumbnail markings were the major visible features of the toughening mechanisms. It is suggested that, at 4 wt. % of the submicron TiO2 particles, microvoids are developed in the epoxy matrix. These microvoids are able to absorb some of the deformation work applied to the material, and thus enhance the toughness of the material. On increasing the TiO2 content in the matrix (> 4 wt. %), the submicron particles got closer to each other and the microvoids were converted to macrovoids, which may act as stress concentrating flaws, leading to the deterioration of the mechanical properties of the epoxy resin. 相似文献
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以二硫化钼、氧化铝和SBS为混合填料,分别加入50%、60%、70%、80%以改善环氧树脂的性能,并且通过涂层表面硬度,以及其在无机玻璃板、瓷砖板上的附着力测试,对耐磨涂层的性能进行深入的研究。结果表明:填料的含量为60%时,涂层表面硬度最好,涂层具有较好的耐磨性,此时涂层的附着力也比较好。 相似文献
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介绍了碳纳米管与环氧树脂复合材料的力学性能、电性能、摩擦性能及吸波性能等;并结合国内外研究现状,探讨了该复合材料制备中存在的问题及发展的方向。 相似文献
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利用插层聚合法制备了环氧树脂/有机蒙脱土(EP/OMMT)复合材料.采用XRD对复合材料进行了表征,并研究了复合材料力学性能.实验表明:环氧树脂/有机蒙脱土形成了剥离型的纳米复合材料结构;环氧树脂中加入适量的有机蒙脱土,可以提高环氧树脂的拉伸强度和冲击强度.当经过改性的OMMT质量分数为5%时,EP/钛酸酯偶联剂(Coupler)-OMMT复合材料的拉伸强度达到51.21 MPa,提高了40.26%;当OMMT质量分数为3%时,EP/Coupler-OMMT复合材料冲击强度达25.31 kJ/m2,提高了34.56%. 相似文献