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。
In order to investigate the impact of drawing ratio of inorganic nano-hybrid polyamide three-layer composite films,the stretched composite films with different draw ratio were prepared by drawing partial imido polyamide film and then through the ring closing reaction in the high temperature,and the draw ratio was 0%,2%,4%,6%,8%,10%,12%,14% etc. Under the same conditions,we made different draw ratio of three-layer composite film tensile test with the electronic universal material testing machine. The results show： doped inorganic nanometer oxide made PI film elastic modulus increase slightly,the tensile strength and elongation at break decrease obviously,but the nano hybrid three-layer composite PI films still had good mechanical properties; The yield of polyimide film should be caused by forced high-elastic deformation of polyimide molecular chain,and it had nothing to do with whether doped inorganic nano-oxide or whether through stretched processing; With the increase of draw ratio,the elastic modulus of the nano hybrid three-layer composite PI films existed the trend of first increased and then slow down gradually,and the tensile strength and elongation at break first decreased and then increased.
出处
《哈尔滨理工大学学报》
CAS
北大核心
2017年第3期102-106,共5页
Journal of Harbin University of Science and Technology
基金
国家自然科学基金(51277044)
关键词
拉伸比
聚酰亚胺薄膜
力学性能
纳米掺杂
drawing ratio
polyimide film
mechanical property
nano-hybrid
