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制备了连续玄武岩纤维平纹布(CBFTC)增强S-157酚醛树脂复合材料。研究了树脂含量对S-157酚醛树脂/CBFTC复合材料力学性能和烧蚀性能的影响,并借助扫描电子显微镜对复合材料断面的微观形貌进行了分析,同时将S-157酚醛树脂/CBFTC复合材料与S-157酚醛树脂/高强玻璃纤维平纹布(GFTC)复合材料进行了性能对比。结果表明,树脂含量在30%时S-157酚醛树脂/CBFTC复合材料的力学性能和烧蚀性能最佳;S-157酚醛树脂/CBFTC复合材料比S-157酚醛树脂/GFTC复合材料具有更好的力学性能和烧蚀性能。 相似文献
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《高科技纤维与应用》2019,(6)
正本发明涉及一种耐腐蚀高性能玄武岩纤维增强双马来酰亚胺/呋喃复合材料,属于热固性树脂材料技术领域。所述复合材料由双马来酰亚胺5~25份、呋喃树脂100份、对甲苯磺酸固化剂3份和总树脂70 wt%左右的玄武岩纤维布组成。本发明制备的玄武岩纤维增强双马来酰亚胺/呋喃复合材料具有更好的力学性能和耐化学腐蚀性能。专利公布号:CN110317429A 相似文献
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本文主要研究玄武岩增强聚丙烯复合材料的力学性能。分别制备了玄武岩纤维含量为10%、20%、30%和40%的纤维增强复合材料,并分析纤维含量对复合材料拉伸性能和弯曲性能的影响。研究表明,玄武岩纤维的加入大幅度提高了复合材料的拉伸性能和弯曲性能,但复合材料的断裂伸长率有所下降;随着玄武岩纤维含量的增加,复合材料的拉伸、弯曲强度和模量呈先增加后减小的趋势,当纤维含量在30%时达最大值;复合材料的弯曲强度和模量的变化规律与拉伸性能相同。 相似文献
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采用流变仪、DSC、TGA等方法研究了9518树脂的流变性能、玻璃化转变温度和热分解温度,流变试验结果表明温度从30℃升到150℃时粘度下降,120℃变化到150℃时凝胶时间缩短。DSC曲线表明在174℃环氧树脂与氰酸酯发生交联反应,玻璃化转变温度为228℃。TGA曲线表明9518树脂的起始分解温度为260℃,EW220/9518和SW220/9518复合材料的力学性能良好,150℃下EW220/9518复合材料的力学性能保持率86%。 相似文献
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使用熔融浸渍法制备了长玻璃纤维增强聚丙烯复合材料(LFTPP–G),研究了不同纤维含量、不同牵引速度及不同相容剂马来酸酐接枝聚丙烯(PP-g-MAH)添加量对复合材料力学性能的影响。结果表明,玻璃纤维在复合材料体系中起增强增韧作用,复合材料力学性能随纤维含量增加而升高;提高牵引速度可以提高生产效率,但复合材料的力学性能及纤维分散性能随之降低;相容剂PP-g-MAH的加入改善了玻璃纤维与树脂的界面结合。当使用自制的浸渍装置且玻璃纤维质量分数为50%、牵引速度为30 m/min、相容剂PP-g-MAH质量分数2%时,制得LFTPP–G具有较好的综合力学性能,其缺口冲击强度相较于纯聚丙烯树脂提高了1323%。 相似文献
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作为目前最成功的改性酚醛树脂品种之一,硼酚醛树脂具有优异的耐热性能和耐烧蚀性能,良好的力学性能、摩擦性能和阻燃性能等。硼酚醛树脂及其复合材料可广泛应用于航空航天、武器装备、汽车制动、防火阻燃等领域。对硼酚醛树脂及其复合材料的研究进展进行了综述。首先概述了硼酚醛树脂的不同制备方法及硼酚醛树脂的改性途径;然后重点总结了硼酚醛树脂基复合材料的常用制备方法及其耐热性能、耐烧蚀性能、力学性能、摩擦性能、阻燃性能、耐水性能;最后,对该领域所存在的问题进行了总结,并展望了其发展趋势。 相似文献
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石英纤维增强氰酸酯树脂基复合材料性能研究 总被引:2,自引:0,他引:2
研究了QF210石英纤维增强新型的改性氰酸酯树脂基复合材料的耐热性、力学性能和介电性能,结果表明5528A/QF210复合材料具有优良的力学性能和优异的介电性能,可在150℃下使用。尤其是5528A/QF210复合材料的介电性能具有极好的频率稳定性,适合作为宽频高透波材料。 相似文献
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Delamination is the most common failure mode in laminated composites due to the weaker strength in the through‐the‐thickness direction. Air‐jet texturing is used to produce bulk and loops in the yarn which provides more contact surface between fibers and resin. The development and characterization of core‐and‐effect textured glass yarns and the effect of texturing on the mechanical properties of laminated composites were presented in previous papers. This article describes the optimization of textured composites by varying the type and combination of constituent yarns for improving the mechanical properties. Composites with combinations of various textured yarns and non‐textured yarns were made. It was observed that the composites made from fabrics having non‐textured yarn in the warp and core‐and‐effect textured yarn in the weft had the best combination of mechanical properties. They maintained the tensile and flexure properties of composites with non‐textured yarns but had significantly higher interlaminar shear strength. POLYM. COMPOS., 2012. © 2012 Society of Plastics Engineers 相似文献
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Yiqiang Wang Litong Zhang Laifei Cheng 《International Journal of Applied Ceramic Technology》2009,6(4):E1-E10
The effects of yarn size on the mechanical properties of silicon carbide composites reinforced with a plain woven carbon cloth with two sizes of yarns (1 and 3 k) were investigated. The experimental results show that the composite fabricated with 1 k yarns exhibits greater stiffness and strength than the composite fabricated with 3 k yarns. Microstructural observations revealed the existence of matrix microcracks in both the composites under the as-processed condition due to the large difference of thermal expansion between the fibers and the matrix, which are more severe for the composite with 3 k yarns. The fractured surfaces of the composite with 1 k yarns showed extensive fiber pull-out in contrast to the yarn pull-out in the composite with 3 k yarns. The larger interyarn and intrayarn voids due to difficulties of matrix infiltration in the composite with 3 k yarns represent the primary contribution to the diminished mechanical properties. Unequal yarn sizes give rise to different yarn waviness, which may be another source of difference in the mechanical properties of composites. 相似文献
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Praveenkumara Jagadeesh Madhu Puttegowda Yashas Gowda Thyavihalli Girijappa Pradeep Shivanna Sanjay Mavinkere Rangappa Suchart Siengchin 《乙烯基与添加剂工艺杂志》2023,29(3):555-567
Structural uses in the vehicle, aerospace, and sporting goods industries are being supplanted by hybrid composites that utilized natural fibers as reinforcements. The main focus of this work is to fabricate and characterize the ramie, hemp, and kevlar fabric reinforced hybrid vinyl ester composites. The composite laminates were fabricated via economically feasible and flexible hand lay-up technique. Overall six composites were prepared by varying the stacking sequence, including both hybrid and non-hybrid composites. The prepared composites were subjected to physical analysis (density, void fraction), mechanical tests (tensile, flexural, interlaminar shear, and impact test), morphological analysis (scanning electron microscopy), and water absorption test. The hybrid composites exhibited lesser void percentage than the non-hybrid composites. The mechanical properties were maximum for kevlar fabric skinned with core natural fabric reinforced composites (L-5, L-6) due to hybridization of highly strengthened kevlar fabrics. Moreover, the number fabric layers reinforced to achieve the standard thickness also affected the mechanical properties. All composite morphologies exhibited the same failure characteristics, including transverse interlaminar shear cracking, microbuckling, and fiber rip. The texture of the Kevlar yarns is uniform, but the texture of the natural fabric yarns is relatively less uniform. In comparison to the salt water medium, the percentage of water absorbed by composites in normal and distilled water was greater. This is due to the presence and accumulation of salt particles on the surface of the materials, which inhibits the action of water molecules, resulting in a drop in the proportion. 相似文献
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This study was conducted due to the necessity for improving the processability of commingled yarns during textile processing, in particular dense 3D preform weaving. Open structure of the commingled yarns caused higher production stops. As a possible solution, GF/PP commingled yarns with different twisting levels were produced. Effect of twisting on the mechanical properties of commingled yarns and on their compression molded UD composites are determined. Further tests were executed about yarn/yarn and yarn/metal friction of twisted commingled yarns, which are important properties during textile processing. Theoretical approaches such as a yarn model with linear bar elements and lamina equation with an equivalent angle distortion of over‐delivery proved useful to relate the structural parameters and mechanical properties. As a result, twisting did not significantly affect the modulus of elasticity of UD‐composites, however, the tensile strength of UD‐composites were reduced by further processing even without twisting. Therefore, small twisting levels can be applied on commingled yarns to improve processability of dense preforms without significantly affecting the mechanical performance. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2011 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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采用流变仪、凝胶时间测试仪和DMA法研究了3068改性环氧树脂的流变性能、凝胶时间和玻璃化转变温度,结果表明,3068树脂在70~125℃粘度约为70Pa·s,80℃下凝胶时间达到160min,玻璃化转变温度为159.3℃,常温和70℃下复合材料具有良好的力学性能,经湿热试验处理后复合材料吸水率为0.96%,力学性能保持率75%。 相似文献
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采用模压成型制备了一系列聚氯乙烯(PVC)/氯化聚氯乙烯(CPVC)配比不同、无机刚性粒子含量不同的木塑复合材料。通过力学性能测试、热变形温度测试、扫描电子显微镜观察等手段对上述木塑复合材料的耐热性及力学性能进行了研究。结果表明,CPVC和无机刚性粒子均显著改善了PVC木塑复合材料的耐热性和力学性能。与PVC木塑复合材料相比,当PVC/CPVC配比为50/50,白云母或凹凸棒土的用量为3份时,改性木塑复合材料的热变形温度分别提高了14.3℃和19.7℃,且力学性能较好。凹凸棒土对木塑复合材料的耐热增强改性效果优于白云母。 相似文献