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剑麻纤维与玻纤混杂增强PVC复合材料的性能研究 总被引:11,自引:0,他引:11
本文介绍采用短麻纤维(SF)和短玻纤(GF)混杂增强PVC基体,测定了复合材料的弯曲强度、弯曲模量、无缺口冲击强度以及耐水浸泡性能,并探讨了这一复合材料在水浸泡前后的力学性能及其界面行为.结果表明,此种复合材料在弯曲模量和无缺口冲击强度上存在正的混杂效应,而弯曲强度存在负的混杂效应;经水浸泡后,复合材料的弯曲强度、弯曲摸量和冲击强度都有不同程度的下降,而对于纯PVC基体,水浸泡后的弯曲强度和弯曲模量反而有所提高,因此可以认为,水浸泡对纯PVC基体在弯曲性能方面无不良影响,水分主要对纤维与基体的界面产生不良作用,导致复合材料性能下降. 相似文献
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制备了聚氯乙烯/粉煤灰复合材料,研究了粉煤灰的不同表面处理方式对共混物的力学性能和耐温性能的影响。结果表明:湿法处理粉煤灰的效果最好,不做处理的效果最差;粉煤灰会降低PVC材料的缺口冲击强度;添加5份处理过的粉煤灰可以提高PVC材料的拉伸强度;添加粉煤灰可以提高PVC材料的弯曲强度和弯曲模量,同时,耐温性也有一定的提高。 相似文献
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制备了聚氯乙烯(PVC)/赤泥复合材料,研究了赤泥的不同表面处理方式对共混物的力学性能和耐温性能的影响。结果表明:湿法处理赤泥的效果最好,不做处理的效果最差;赤泥的含量在15份时,共混物的缺口冲击强度和拉伸强度最大;添加赤泥可以提高PVC材料的弯曲强度和弯曲模量,同时,耐温性能也有一定程度的提高。 相似文献
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采用熔融插层法制备了聚氯乙烯(P、忙)/有机黏土纳米复合材料并进行了表征,研究了PVC/有机黏土纳米复合材料的力学性能及稳定性。X射线衍射分析表明PVC/有机黏土纳米复合材料为剥离型纳米复合材料。PVC基体的断裂伸长率、冲击强度和拉伸强度分别为5.4%、4.07kJ·m^-2 32.53MPa,而P、忙/有机黏土纳米复合材料的相应值分别为12.3%、5.08kJ·m^-2 34.7MPa,分别比PVC基体提高1.3倍,25%和7%。PVC/有机黏土纳米复合材料维卡软化点没有明显的提高。 相似文献
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研究了注塑级聚氯乙烯(PVC)/丙烯晴-丁二烯-苯乙烯(ABS)合金的加工流变性能.该合金采用挤出造粒、注射成型的方式制备,探讨了不同配比下合金力学性能、耐热性、相容性以及毛细管流变性能的变化.结果表明:PVC/ABS合金是半相容结构;合金的拉伸强度随着PVC用量的降低呈下降的趋势;PVC/ABS的质量比为40/60时合金的相容性最好,冲击强度最高;合金的弯曲强度和弯曲模量都随着合金中ABS用量的升高而下降.合金的耐热性随着PVC/ABS合金中ABS用量的增大而升高.PVC/ABS的质量比为20/80时合金的流动性最好. 相似文献
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PVC/MBS/埃洛石纳米管复合材料的制备及其性能 总被引:1,自引:1,他引:0
采用熔融共混法制备了聚氯乙烯(PVC)/甲基丙烯酸甲酯-丁二烯-苯乙烯共聚物(MBS)/埃洛石纳米管(HNTs)三元复合材料,研究了HNTs对PVC/MBS共混体系力学性能、热性能和微观结构的影响。结果表明:HNTs与MBS可协同增韧PVC,使复合材料的强度和刚性得到改善,当HNTs的填充量为3 phr时,PVC/MBS(100/3)共混体系的冲击强度、拉伸强度、弯曲强度和弯曲模量分别提高了57.7%、12.1%、7.6%和45.9%;其冲击断面呈现韧性断裂特征;TEM观察结果发现,HNTs在PVC/MBS共混体系中具有良好的分散状态;热失重分析显示,HNTs对PVC/MBS共混体系热稳定性的提高能起到一定作用。 相似文献
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Two classes of nanocomposites were synthesized using an unsaturated polyester resin as the matrix and sodium montmorillonite as well as an organically modified montmorillonite as the reinforcing agents. X‐ray diffraction pattern of the composites showed that the interlayer spacing of the modified montmorillonite expanded from 1.25 nm to 4.5 nm, indicating intercalation. Glass transition values of these composites increased from 72°C, in the unfilled unsaturated polyester, to 86°C in the composite with 10% organically modified montmorillonite. From Scanning Electron Microscopy, it is seen that the degree of intercalation/exfoliation of the modified montmorillonite is higher than in the unmodified one. The mechanical properties also supported these findings, since in general, the tensile modulus, tensile strength, flexural modulus, flexural strength and impact strength of the composites with modified montmorillonite were higher than the corresponding properties of the composites with unmodified montmorillonite. The tensile modulus, tensile strength, flexural modulus and flexural strength values showed a maximum, whereas the impact strength exhibited a minimum at approximately 3–5 wt% modified montmorillonite content. These results imply that the level of exfoliation may also exhibit a maximum with respect to the modified montmorillonite content. The level of improvement in the mechanical properties was substantial. Adding only 3 wt% organically modified clay improved the flexural modulus of unsaturated polyester by 35%. The tensile modulus of unsaturated polyester was also improved by 17% at 5 wt% of organically modified clay loading. 相似文献
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《国际聚合物材料杂志》2012,61(11):854-862
The tensile strength, tensile modulus, flexural strength and flexural modulus properties were investigated on epoxy/clay nanocomposites to assess the influence of nanoclay. Mechanical properties were significantly increased due to an increase in clay content up to 5 wt%, and decreased with a further increase in clay content. Optimal improvement of properties was observed with increased clay content up to 5 wt%. Duo properties of the glass fiber were improved by clay addition due to the improved interface between the glass fiber and epoxy. SEM analysis was conducted on different fractured surfaces to study the mechanical behavior. 相似文献
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以聚氯乙烯(PVC)为基体、热塑性聚氨酯弹性体(PUR–T)为增韧剂、连续玻璃纤维(GF)为增强剂,通过熔体浸渍挤出工艺制备高性能PVC复合材料,并对其力学性能、耐热性能和动态力学性能进行研究。结果表明,随着PUR–T或连续GF含量增加,复合材料的力学性能和耐热性能均得到提高,当PUR–T/PVC质量比为2/8,连续GF质量分数为30%时,复合材料的拉伸强度、缺口冲击强度、弯曲强度、弯曲弹性模量、维卡软化温度分别为83.42 MPa,19.81 k J/m2,106.33 MPa,8 823.36 MPa和74.1℃;随着连续GF含量增加,复合材料的储能模量和玻璃化转变温度提高,损耗因子降低;扫描电子显微镜测试结果表明连续GF在PVC中保持了较长的长度,分散性良好。 相似文献