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采用熔融挤出法制备了尼龙(PA)6/热塑性聚氨酯(PUR-T)/玻璃纤维(GF)复合材料,研究了复合材料的力学性能及其断面形貌。结果表明,PA6/PUR-T复合材料的拉伸强度和拉伸弹性模量较纯PA6明显降低,PA6/PUR-T/GF复合材料的拉伸强度和拉伸弹性模量明显高于PA6/PUR-T复合材料,当GF质量分数超过30%时,PA6/PUR-T/GF复合材料的拉伸强度和拉伸弹性模量高于纯PA6。PA6/PUR-T/GF复合材料的冲击性能也明显优于纯PA6,体现了GF和PUR-T对PA6的协同增强和增韧。 相似文献
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将经过改性的玻璃纤维(GF)以不同的含量加入到聚丙烯(PP)中,在二次开模条件下制备微发泡PP/GF复合材料,分析了不同含量GF对微发泡PP复合材料力学性能的影响。结果表明,GF具有明显的填充增强作用,当GF质量分数为20%时,微发泡PP复合材料的拉伸强度达到50.24 MPa,比未发泡纯PP的提高了59.5%;微发泡材料的冲击强度为7.37kJ/m2,发泡后材料的冲击强度与纯PP的相比提高了93.9%;发泡后材料密度相对于未发泡的显著下降。 相似文献
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采用机械共混法和纳米ZnO表面偶联剂改性技术,制备了聚甲醛(POM)/热塑性聚氨酯(TPU)/改性纳米ZnO复合材料,并借助偏光显微镜(PLM)、差示扫描量热仪(DSC)和X射线衍射仪(XRD)分析了复合材料的结晶形态和结晶性能,研究了改性纳米ZnO用量对POM/TPU/改性纳米ZnO复合材料力学性能的影响。结果表明:改性纳米ZnO在体系中起到一定的异相成核作用,促进了POM的结晶,并使得POM球晶细化;当改性纳米ZnO用量为0.3%时,复合材料具有最佳综合力学性能。 相似文献
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J. Z. Liang 《Polymer-Plastics Technology and Engineering》2013,52(3):292-296
A kind of nanometer calcium carbonate (nano-CaCO3) filled glass fibre-reinforced polyphenylene sulfide/polycarbonate (PPS/PC/GF) hybrid composites were fabricated with a twin-screw extruder in this paper, and the surface of the nanometer particles was pretreated with stearic acid in a high speed mixer before melt blending. The Young's modulus, tensile strength, tensile elongation at break, flexural modulus and strength of these hybrid composites were measured at room temperature by using a universal materials testing machine, to identify the influence of the nano-CaCO3 content on the mechanical properties of these hybrid composites. It was found that there were relatively evident reinforcing and toughening effects of the nano-CaCO3 on the PPS/PC/GF hybrid composites. The Young's modulus, tensile strength, flexural strengt and elongation at break of these composites increased nonlinearly with an addition of the nano-CaCO3 weigh fraction (φ f ) when φ f was less than 6%, and they reached the maximum at φ f of 6%, and then decreased; while the flexural modulus increased as φ f was less than 4%, and then decreased. 相似文献
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研究了玻璃微珠(GB)用量对聚对苯二甲酸丁二醇酯(PBT)/短玻纤(GF)复合材料熔体流变性和力学性能的影响。结果表明:GB的加入使复合材料的加工流动性增加,添加1.25份GB时,复合材料的MFR比未添加时增加了21%;随着GB用量的增加,复合材料的拉伸、弯曲强度均减小,而材料的断裂伸长率、冲击强度先增大后减小;添加0.25份GB时复合材料的断裂伸长率和冲击强度分别比未添加时增加了11%和33%。 相似文献
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通过熔融共混、模压成型方法,制备了纳米二氧化硅(SiO2)/不饱和聚酯(UP)复合材料,研究了纳米SiO2含量对复合材料的力学性能、动态力学性能和热膨胀性能的影响,采用SEM观察了复合材料的磨损面形貌。结果表明:当纳米SiO2含量为2.5%时,SiO2/UP复合材料的冲击强度和弯曲强度比纯UP分别提高了28.57%、8.43%;当纳米SiO2含量为3.5%时,SiO2/UP复合材料的玻璃化转变温度比纯UP提高了16℃;当纳米SiO2含量为0.5%时,SiO2/UP复合材料的热膨胀系数为41.367×10-6K-1;加入纳米SiO2后,SiO2/UP复合材料的磨损机理主要表现为磨粒磨损和黏着磨损。 相似文献
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J. Z. Liang 《Polymer-Plastics Technology and Engineering》2013,52(12):1227-1230
To identify the influence of the content and surface treatment of nano-CaCO3 on the mechanical properties of nanometer calcium carbonate (nano-CaCO3)-filled glass fiber (GF)-reinforced polyphenylene sulfide ternary composites, the impact strength, flexural modulus, and strength were measured at room temperature. It was found that the notched impact strength and flexural strength of these composites increased with an increase of the nano-CaCO3 weight fraction (φ f ) when φ f was less than 2% and then they decreased, and the unnotched impact strength of these composites roughly nonlinearly increased with an addition of φ f , whereas the effect of φ f on the flexural modulus was insignificant. The impact strength and flexural strength for these filled systems with the particle surface pretreated with titanate coupler were greater than those of the filled systems with the particle surface pretreated with sttaric aicd. 相似文献
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