添加剂对聚酰亚胺液晶垂直取向剂性能的影响

添加剂对聚酰亚胺液晶垂直取向剂性能的影响

丁紫君;刘明;邵磊山;汪映寒

【期刊名称】《功能材料》 【年(卷),期】2012(043)001

【摘要】The effect of the additive on alignment property,rubbing-resistance,thermal

stabilities

and

transmittance

of

PI

was

investigated.The PI alignment film was prepared by pyromellitic dianhydride（PMDA）,p-phenylenediamine（PDA） and 4-hexyloxy-bip henyl-3＇,5＇2-diaminobenzoate（C6-BBDA）.The PI was modified by the additive（end capping agent and crosslinking agent）.The structures and properties of PI were measured with infrared spectrometer（FT-IR）,thermogravimetric analysis（TGA）,ultra-visible spectrometer,polarized microscopy and pretilt angle tester.It was found that uniform LC vertical alignment was induced by four kinds of PI films.PI film modified with crosslinking agent showed excellent rubbing-resistance and still kept LC vertical alignment after strong rubbing in rubbing strength as 600mm.PI films with the additives possessed good thermal stabilities.Moreover,PI films with the additives had high transmittance.%研究了添加剂对PI取向性能、耐摩擦性、热稳定性以及透光率的影响。用均苯四甲酸二酐（PM-DA）,对苯二胺（PDA）,4-已氧基联苯酚-3’,5’-二胺基苯甲酸酯（C6-BBDA）,制备了三元共聚型PI取向膜,并采用添加剂（封端剂和交联剂）对PI改性。通过调节添加剂的组成制备了4种PI。