拉伸比对纳米杂化PI复合薄膜力学性能的影响

发布时间：2018-11-04 13:01

【摘要】：为了考查拉伸对无机纳米硅/铝氧化物掺杂三层复合聚酰亚胺薄膜的影响,对适当亚胺化的薄膜进行了拉伸比分别为:0%(未拉伸)、2%、4%、6%、8%、10%、12%、14%的处理,然后经高温完全亚胺化。在相同的条件下对不同拉伸比的三层复合薄膜用电子万能材料试验机进行拉伸测试。结果表明:因掺杂了纳米无机氧化物,PI薄膜的弹性模量略有增加,拉伸强度和断裂伸长率明显下降,但仍保持较好的力学性能;PI薄膜的屈服应该是聚酰亚胺分子链本身的强迫高弹形变,与PI薄膜是否掺杂纳米无机氧化物或者是否经过拉伸处理无关;随着拉伸比的增加,无机纳米氧化物掺杂三层复合PI薄膜的弹性模量整体上存在先缓慢增加而后逐渐下降的趋势,拉伸强度和断裂伸长率先下降然后上升。
[Abstract]:In order to investigate the effect of stretching on inorganic nano-silicon / aluminum oxide doped three-layer composite polyimide films, the tensile ratios of the appropriate imide films were 0% (unstretched), 2% and 4% respectively. It is treated by 14% and then imidified completely at high temperature. Under the same conditions, three layers of composite films with different drawing ratios were tested by electronic universal material tester. The results showed that the elastic modulus of PI films increased slightly, the tensile strength and elongation at break decreased obviously, but the mechanical properties of PI films remained better. The yield of PI film should be the forced high elastic deformation of the polyimide chain itself, which is independent of whether the PI film is doped with nano-inorganic oxide or whether the film is subjected to tensile treatment. With the increase of tensile ratio, the elastic modulus of inorganic nano-oxide doped three-layer composite PI films increased slowly first and then decreased gradually. The tensile strength and elongation at break first decreased and then increased.
【作者单位】：哈尔滨理工大学材料科学与工程学院;
【基金】：国家自然科学基金(51277044)
【分类号】：TB383.2

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