竹纤维增强聚己内酯复合材料热老化性能研究

发布时间：2018-03-02 09:03

  本文关键词： 竹纤维 聚己内酯 复合材料 热老化性能　出处：《中国塑料》2017年04期 　论文类型：期刊论文

【摘要】：以聚己内酯(PCL)和竹纤维(BF)为原料,通过模压成型工艺制备了PCL/BF复合材料并研究其热老化性能。通过力学性能分析、红外光谱分析、流变实验分析等来研究BF质量分数、热老化时间、热老化温度对PCL/BF复合材料热老化性能的影响。结果表明,随着BF质量分数的增加,PCL/BF复合材料老化后力学性能的降幅呈先减小后增大的趋势;储能模量及损耗模量上升程度随BF质量分数的增加呈现减小的趋势;随着热老化温度的升高及热老化时间的延长,复合材料的力学性能均下降;热氧化作用使得复合材料内部大分子基团大量分解,分子排列遭到破坏,PCL分子链上的基团与水发生反应,发生水解进而逐渐断裂;复合材料的储能模量、损耗模量随着热老化温度的升高及热老化时间的延长均呈现上升趋势。
[Abstract]:PCL/BF composites were prepared and their thermal aging properties were studied by means of moulding molding with polycaprolactone (PCL) and bamboo fiber (PCL/BF) as raw materials. The mass fraction of BF was studied by means of mechanical property analysis, infrared spectroscopy analysis and rheological experiment analysis. The effect of aging time and temperature on the thermal aging properties of PCL/BF composites was investigated. The results showed that the decrease of mechanical properties of PCL/BF / BF composites decreased first and then increased with the increase of BF mass fraction. The increasing degree of energy storage modulus and loss modulus decreased with the increase of BF mass fraction, and the mechanical properties of composites decreased with the increase of thermal aging temperature and the prolongation of thermal aging time. The thermal oxidation results in the decomposition of macromolecular groups in the composite, the destruction of molecular arrangement and the reaction between the groups in the molecular chain of PCL and water, and the hydrolysis, and then the fracture, the storage modulus of the composite, The loss modulus increases with the increase of thermal aging temperature and the prolongation of thermal aging time.
【作者单位】： 中南林业科技大学材料科学与工程学院;
【基金】：湖南省自然科学省市联合基金项目(14JJ5017) 湖南省科技计划项目(2015SK2069)
【分类号】：TB332
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本文编号：1555874