摘要
通过调节不同二元胺和二元酸酐的结构和组成,实现了嵌段共聚聚酰亚胺薄膜的可控制备,研究了聚酰亚胺不同的组成结构对其力学性能、热性能和线膨胀系数的影响。结果表明:依照刚性组分(如PDA、PMDA)含量的不同,其弹性模量、断裂伸长率和拉伸强度呈现规律性变化。热失重分析和热分解动力学研究表明,由于所制备聚合物的分子链具有高度苯基化和高度结构对称性,所得共聚聚酰亚胺薄膜具有优异热稳定性能,900℃时残炭率高达50%以上。而且其尺寸稳定性非常好,线膨胀系数与铜十分接近,在覆铜板和柔性器件等领域具有应用潜力。
By adjusting the structure and composition of different diamine and dianhydride,we realized the controllable preparation of block copolymerized polyimide films.The effects of different composition structure of polyimide on its mechanical properties,thermal properties,and linear expansion coefficient were studied.The results show that according to the difference of rigid components(such as PDA,PMDA)content,the elastic modulus,elongation at break,and tensile strength of the films change regularly.The thermogravimetric analysis and the study of thermal decomposition kinetics show that due to the high phenyl and structural symmetry of the molecular chain of the prepared polymer,PI has excellent thermal stability,and the carbon residue rate is as high as 50%at 900℃.Moreover,its dimensional stability is very good,the linear expansion coefficient is very close to that of Cu,which shows potential application in copper clad plates and flexible devices.
作者
崔柯雯
王轶
刘静
CUI Kewen;WANG Yi;LIU Jing(School of Materials Science and Engineering,Guilin University of Electronic Science and Technology,Guilin,541004,China)
出处
《绝缘材料》
CAS
北大核心
2021年第11期114-119,共6页
Insulating Materials
基金
国家自然科学基金资助项目(52003062)
广西自然科学基金资助项目(2019GXNSFAA245042)
广西人才基地专项项目(AD19110072)
关键词
聚酰亚胺
聚集态
嵌段共聚
polyimide
aggregation state
block copolymerization
