共查询到19条相似文献,搜索用时 156 毫秒
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空心玻璃微珠/环氧复合材料的制备及性能研究 总被引:3,自引:1,他引:2
制备了空心玻璃微珠/环氧复合材料。通过力学性能、固化收缩率、热性能等测试考察了空心玻璃微珠粒径、填充量、硅烷偶联剂处理对树脂及固化物性能的影响。结果表明,硅烷偶联剂改善了空心玻璃微珠与树脂基体的相容性。复合材料的力学性能随着空心微珠粒径减小而增大。随着空心微珠填充量的加大,固化物拉伸强度有所降低,冲击强度和弯曲强度在空心玻璃微珠质量分数为2%时达到最大值,比纯树脂分别提高了30%和34.2%,同时材料的固化收缩率和密度降低,玻璃化转变温度升高。 相似文献
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空心玻璃微珠填充MC尼龙复合材料的研究 总被引:7,自引:0,他引:7
对空心玻璃微珠填充铸型(MC)尼龙进行了系列研究,考察了空心玻璃微珠含量、粒径及表面处理对MC尼龙性能的影响。结果表明,空心玻璃微珠改性MC尼龙复合材料的物理性能和力学性能优良,当加入10%表面处理的空心玻璃微珠时,制品的收缩率下降,热变形温度提高20℃以上,制品具有填料分布均匀、外观光泽优良等优点。与未处理的空心玻璃微珠相比,填充经表面处理空心玻璃微珠的复合材料拉伸强度、弯曲强度、断裂伸长率分别提高了15.7%、12.2%和246%。空心玻璃微珠的粒径愈小,复合材料的力学性能愈好。一定用量的玻璃微珠填充MC尼龙不仅可以使材料保持较好的力学性能和耐热性能,而且能够降低MC尼龙复合材料的成本。 相似文献
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环氧树脂基固体浮力材料的研制及表征 总被引:10,自引:0,他引:10
采用空心玻璃微珠填充环氧树脂研制固体浮力材料。间苯二胺 (MPD)、顺丁烯二酸酐 (MA)、二氨基二苯砜(DDS)及 593四种固化剂对比研究表明,MPD和DDS环氧树脂固化体系轴向压缩强度可达 210MPa。γ 氨丙基三乙氧基硅烷(KH—550)偶联剂在无机玻璃微珠与有机环氧树脂的复合过程中,可增加环氧树脂与微珠之间的亲合,电镜照片观察到微珠与环氧树脂间无界面沟隙,粘结界面均匀。空心玻璃微珠质量填充量为 25%时,复合材料密度降低至 0. 61g/cm3,轴向压缩强度仍能保持在 40MPa以上。 相似文献
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空心玻璃微珠填充PP复合材料的结构与性能研究 总被引:12,自引:1,他引:12
采用偶联剂KH-550处理空心玻璃微珠,在宽广的用量范围内考察了玻璃微珠含量对PP复合材料拉伸强度、冲击强度、流变性能的影响;研究了复合材料的耐热性能和相态结构,对材料冲击断裂面进行了扫描电镜分析。研究结果表明:与未活化的玻璃微珠相比,填充活化玻璃微珠的复合材料的拉伸强度、冲击强度明显提高;一定用量的玻璃微珠填充PP不仅可以使材料的力学性能和耐热性能保持较好,而且能够降低PP复合材料的成本。 相似文献
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《Ceramics International》2020,46(1):415-420
The heat resistant buoyancy materials were fabricated by the molding method using the aluminum dihydric phosphate as the matrix and hollow glass microspheres as the filler, respectively. In order to improve the waterproof performance of the buoyancy, two strategies, adding the B4C additives and introducing the silica-based coatings, were adopted. The study showed that the samples with the B4C content of 10 wt% possessed the optimal comprehensive performance, such as low density (0.540 g/cm3) and low water absorption (29.6%). The effect of the coating types and coating times on the density, water absorption, compressive strength and specific strength of the buoyancy materials were also studied. After 4 times of coating, the density and the compressive strength of the sample increased to 0.62 g/cm3 and 6.0 MPa, respectively; the water absorption of the samples greatly decreased to 10%. Besides, all samples exhibited significant pseudoductility. The buoyancy materials with the above superior properties can be potentially used in the deep see fields. 相似文献
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Xinfeng Wu Lihua Dong Fuhua Zhang Yun Zhou Liping Wang Dongsheng Wang Yansheng Yin 《Polymer Composites》2016,37(2):497-502
The present study focuses on the preparation and characterization of three phase epoxy syntactic foam (ESF) filled with carbon fiber reinforced hollow epoxy macrospheres (CFR‐HEMS) and hollow glass microspheres (HGMS). The ESF was produced by embedding CFR‐HEMS into a mixture of epoxy‐hardener and 30 wt% HGMS. An innovative approach and simple procedure was implemented in the preparation of CFR‐HEMS where expanded polystyrene (EPS) beads were used as initiation template. The EPS beads were coated with epoxy resin and carbon fiber using “rolling ball method,” and these coated EPS beads were later cured and post‐cured at high temperature which will shrink the EPS beads thus producing a hollow macrosphere structure. The compressive property of ESF was characterized and the mechanical model was issued. The ESF (450 kg/m3, 30.74 MPa) can withstand 2049 m water pressure and provide 550 kg/m3 buoyancy, the higher strength are due to the fiber spherical x–y network throughout the macrosphere epoxy matrix, which can give some support to the preparation of buoyancy material used in deepwater oil exploration. POLYM. COMPOS., 37:497–502, 2016. © 2014 Society of Plastics Engineers 相似文献
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A simple circular pultruded rod was used to evaluate the mechanical and economic performance of four commercially available hollow spherical fillers (microbubbes). The incorporation of such glass or silicate microbubbes in a pultruded rod produced a decrease in density, strength and modulus. However, the loss of strength and modulus was more than compensated for by the decrease in density so that a 50 percent material cost saving was possible without any sacrifice in flexural or torsional properties. Thus for simple profile (rods, bars. Panels) the use of hollow spherical fillers can be economically advantageous in reducing material costs. The syntactic pultrusions posses many of the desirable properties of wood such as toughess, low density, high strength and stiffness plus the ability to accommodate nails and screws. The operating conditions of the pultruder wee normal with the exception that half as much force was needed on the puller and the pultruder would only operate satisfactorily when the resin/glass fiber/microbubble concertrations were within specified boundaries. Pyrex type glass bubbles were found to be less prone to damage during processing and performed better than silicate type microbubbles. 相似文献
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为实现SMC轻量化,通过模压工艺,从原材料选型、配方设计以及工艺过程控制三个方面对轻质SMC(片状模塑料)进行了探究。首先,通过研究不同类型中空玻璃微珠(HGS)对制品比重、光亮度以及弯曲强度的影响发现,VS5500和H40适合作为轻量化SMC轻质填料,制品的设计密度和真实密度比较接近,且力学性能损失较小。其次,通过配方设计,研究了中空微珠用量、增稠剂类型以及增稠剂用量对制品比重的影响。同时研究了玻纤含量和树脂类型对制品力学性能的影响。研究结果表明,轻质SMC的设计密度不能过低,否则制品中HGS的破损比例将会增加。研究发现EK100作为增稠剂,树脂糊前期粘度可以有效控制,后期粘度快速上升,可以有效防止中空微珠相分离的发生。此外,随着玻纤含量从25%增加到30%,制品力学性能呈现增加趋势,弯曲强度从148 MPa增加到172 MPa,但随着玻纤进一步提高,弯曲强度反而出现大幅度衰减,降到140 MPa。通过研究三种不同类型树脂对制品外观和力学性能的影响,使用P18-03树脂压制的制品外观最好,其弯曲强度为172 MPa,满足汽车外饰件力学性能要求。最后,通过工艺过程控制,研究了微珠处理工艺对制品比重的影响。结果表明,烘干处理的HGS可以有效降低树脂糊的水含量,从而保证树脂糊后期粘度可以达到适合模压的窗口。 相似文献
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某类型天线罩外形尺寸较大,减重要求高,三维中空复合材料可满足该类型天线罩透波和结构高强的要求。针对上述使用要求和实际工况,选择三维中空织物复合材料为主体结构,玻璃纤维增强环氧树脂复合材料为补强面层,制备三维中空结构天线罩,采用有限元分析软件建立三维中空结构天线罩的有限元模型,对该类型天线罩在使用工况下的刚度、强度和稳定性进行分析,其计算结果满足刚度、强度和稳定性的要求,并通过压力试验验证中空夹层天线罩的变形量与有限元分析结果保持一致,从而指导该天线罩的铺层设计、优化及材料的选用。 相似文献