Six Major Uses of Silver Nitrate Powder

  Introduction BPDA (3,3′,4,4′-Biphenyltetracarboxylic dianhydride)  is a crucial dianhydride monomer widely used in the synthesis of advanced polyimide (PI)  materials. Known for its rigid biphenyl structure, excellent thermal stability, and chemical resistance, BPDA has become a cornerstone in the development of high-performance polymers . This article explores the three major applications of BPDA , highlighting its role in modern materials science and electronic industries. 1. Polyimide Films for Flexible Electronics One of the most important uses of BPDA is in the production of polyimide films . When copolymerized with aromatic diamines (such as p-phenylenediamine or ODA), BPDA forms polymers that exhibit exceptional heat resistance (up to 400 °C)  and low dielectric constants. These BPDA-based polyimide films are widely applied in: Flexible printed circuit boards (FPCs) Display substrates for OLED and LCD panels Insulation layers in semiconductor packaging The r...

  Introduction to BPDA Chemical Name:  3,3′,4,4′-Biphenyltetracarboxylic dianhydride Molecular Formula:  C₁₆H₆O₆ Molecular Weight:  294.22 CAS Number:  2420-87-3 BPDA  is an aromatic tetracarboxylic dianhydride compound , and one of the most important dianhydride monomers for synthesizing high-performance polyimides (PI) . Due to its rigid biphenyl structure and symmetric molecular backbone, BPDA significantly enhances the thermal stability, mechanical strength, and chemical resistance  of polyimide materials. Consequently, it is widely used in aerospace, electronics, electrical insulation, and flexible display technologies . 1. Chemical Structure and Characteristics BPDA consists of two benzene rings linked by a carbon–carbon bond, with carboxylic anhydride groups attached at the 3,3′,4,4′ positions. This planar, highly conjugated, and rigid molecular architecture  gives BPDA-based polyimides their exceptional properties: Excellent thermal stabil...