一种共聚型聚酰亚胺的合成条件探究与性能表征  

Study of synthesis conditions and properties characterization of copolymerization polyimide

作　　者：邱军利[1] 霍冀川[2] 雷永林[1] 李建峰[1] 吴慧君[1] 

机构地区：[1]西南科技大学材料科学与工程学院,四川省绵阳市621010 [2]西南科技大学分析测试中心,四川省绵阳市621010

出　　处：《合成树脂及塑料》2016年第3期30-34,46,共6页China Synthetic Resin and Plastics

摘　　要：采用溶液缩聚合法制备了聚酰亚胺(PI)薄膜,讨论了反应时间、反应温度、固体质量分数等对PI性能的影响。以共聚合的方式在溶液中进行缩聚合得到聚酰胺酸(PAA),PAA经过高温酰亚胺化得到PI薄膜。结果表明:反应时间、反应温度、固体质量分数的改变对PI的结构和性能均有明显的影响;在低温,反应时间为48 h,固体质量分数为20%时,合成的PI性能更优;PI薄膜在20℃及固体质量分数为10%时的结晶性能更好,热膨胀系数最低,为15.26μm/℃。Polyimide（PI） film is synthesized by solution condensation. The polyamide acid（PAA） is obtained by solution condensation in the form of copolymerization to prepare the PI film by thermal imidization. The effect of reaction time,temperature,solid mass fraction on the property of PI are discussed. The results show that the reaction time,temperature,solid mass fraction exert significant effect on the structure and properties of the PI film. It is found that PI film has better performance when the reaction time is 48 h,the solid mass fraction of 20% at low temperature. The crystallinity of the film is the best at 20 ℃,the 10% solid mass fraction,and the coefficient of thermal expansion drops to the minimum,15.26 μm /℃.

关 键 词：聚酰亚胺 共聚合 缩聚合 薄膜 性能 

分 类 号：O631.5[理学—高分子化学] TB383.2[理学—化学]