聚酰亚胺薄膜拉伸强度的改进研究  

Study on Improvement of Tensile Strength of Polyimide Film

作　　者：林明华[1] 陈一虹[1] 黄剑莹[1] 林强[1] 邹友思[1] 

机构地区：[1]厦门大学材料科学与工程系,福建厦门361005

出　　处：《厦门大学学报（自然科学版）》2005年第2期234-237,共4页Journal of Xiamen University：Natural Science

摘　　要：以二步法制备了均苯型聚酰亚胺薄膜,研究了提高聚酰亚胺薄膜力学性能的方法.结果表明,添加了磷酸三苯酯后,聚酰亚胺薄膜的拉伸强度得到显著提高;当磷酸三苯酯的添加量为聚酰亚胺质量的 3%时,聚酰亚胺薄膜的拉伸强度可提高1.8倍;经红外光谱测试,添加磷酸三苯酯后不会改变原来聚酰亚胺分子的结构.不同的去溶剂温度和热亚胺化的升温方式对聚酰亚胺薄膜拉伸强度也有较大的影响.去溶剂温度为 90℃,以 8℃/min的升温速率进行热亚胺化,热亚胺化的最高温度设定为375℃,采用分两段的阶梯式升温方式,均有利于提高聚酰亚胺薄膜的拉伸强度.A study of mechanical properties is of importance for investigation of phase aggregation states,structure,and interactions in polymer chains which determine the suitability of a polyimide film in a specific application.In this paper,the methods to improve the mechanical properties of polyimide film based on pyromellitic dianhydride (PMDA) and 4,4’-oxydianiline (ODA) have been researched.When triphenyl phoshpate is added,the tensile strength of polyimide film is obviously improved.When the addition is the weight of polyimide film’s 3%,the tensile strength is increased 1.8 fold compared to the original.By infrared analysis,the structure of polyimide film added triphenyl phoshpate has not been changed,and its tensile strength is approaching to Kapton H film’s.The tensile strength of polyimide film will also be affected by the temperature of de-solvent and the heating way of thermal imidization.When the process of de-solvent is kept at 90℃,or the heating rate of thermal imidization is 8℃/min,or the top temperature of thermal imidization is 375℃,or the heating way of two steps is used,the tensile strength of polyimide film can be improved too.In a word,we have found that many factors have influenced on the tensile strength of polyimide film.After our work,the tensile strength have been greatly improved.

关 键 词：聚酰亚胺薄膜 拉伸强度 磷酸三苯酯 热亚胺化 技术改造 合成工艺 杂环聚合物 

分 类 号：TQ323.6[化学工程—合成树脂塑料工业]