聚甲基丙烯酰亚胺基复合材料结构及模量表征  

Structural and Young’s Modulus Characterization of PMI Composite Material

作　　者：王世伟 陈进 WANG Shi-wei;CHEN Jin(Guoguang Electric Company Limited,Guangdong Guangzhou 510800,China)

机构地区：[1]国光电器股份有限公司

出　　处：《广州化工》2019年第20期82-83,115,共3页GuangZhou Chemical Industry

摘　　要：研究了一种微型扬声器用球顶材料——聚甲基丙烯酰亚胺(PMI)基复合材料,并对其结构及模量进行表征.利用TEM分析PMI基复合材料的微观结构,采用FTIR表征了PMI发泡材料的六元酰亚胺环结构,通过弯曲测试与Klipple SPM对比表征杨氏模量.研究表明:PMI基复合材料具有三维闭孔发泡的多边形薄壁结构,三点弯曲法能够在避免损伤PMI基复合夹层材料的前提下,实现对杨氏模量的准确表征,PMI基复合材料的力学性能得益于其闭孔薄壁的发泡结构,其杨氏模量达到14.8 GPa以上.Micro speaker dome material was researched, which was the sandwich structure based on PMI composite material, and the structural and Young s modulus were characterized. Microstructure of PMI foams was analyzed through TEM, hexahydrimide ring of PMI foams was analyzed by FTIR, and Young s modulus was compared by bending test & Klippel SPM test. Studies showed that PMI foams had a polygonal thin-walled structure with three-dimensional closed-cell foam. The three-point bending method could accurately characterize Young s modulus on the premise of avoiding damage to PMI composite with sandwich structure. Young s modulus of PMI sandwich structure composite materials was excellent, reaching above 14.8 GPa.

关 键 词：聚甲基丙烯酰亚胺 闭孔发泡 杨氏模量 微型扬声器球顶材料 

分 类 号：TB324[一般工业技术—材料科学与工程]