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2023.Jul.03

热分析-DMA 动态热机械分析仪的应用与标准方法ASTM/ISO/JIS

动态热机械分析仪的应用与标准方法ASTM/ISO/JIS

DMA动态热机械分析仪(Dynamic Mechanical Analyzer)主要测试材料强度与温度之间的关系,可以同时测试储存模数(Storage Modulus),损失模数(Loss Modulus),阻尼系数(Tan delta) (如图一)。也能透过强度的变化得知高分子玻璃转移温度(Tg, Glass transition temperature)。同时能使用合成频率的方式在一次升温实验下同时测试5种不同频率,以合成主导曲线(Master curve)。
PCB产业: DMA可用于研究PCB材料的动态机械性能,例如弹性模数、强度和玻璃转移温度等。
橡胶产业: DMA可用于研究橡胶材料的动态机械性能,例如:老化测试、强度测试、防震橡胶吸震效果评估。
HITACHI独家的合成频率测试软件能在一次的升温条件下直接测试Master curve曲线,业界中数一数二的压力控制马达能做到大拉力测试在绘制应力-应变曲线(SS curve)
 
常见国际标准测试方法
IPC TM650 2.4.24.4 Glass Transition and Modulus of Materials Used in High Density Interconnection(HDI) and Microvias-DMA Method 使用DMA测试玻璃转移温度&弹性模数
ISO 6721-1 Plastics – Determination of dynamic mechanical properties – Part 1:General DMA测试塑料一般规则
ISO 6721-4 Plastics – Determination of dynamic mechanical properties – Part 4:Tensile vibration – Non-resonance method DMA 拉伸黏弹特性
ISO 6721-5 Plastics – Determination of dynamic mechanical properties – Part 5:Flexural vibration – Non-resonance method DMA 弯曲黏弹特性
ASTM D4065-20 Standard Practice for Plastics:Dynamic mechanical properties:Detemination and Report of Procedures DMA 黏弹特性评估
ASTM D5023-15 Standard Test Method for Plastics:Dynamic mechanical properties:In Flexure(Three-point Bending) DMA 三点式弯曲黏弹特性
ASTM D5024-15 Standard Test Method for Plastics:Dynamic mechanical properties:In Compression DMA 压缩黏弹特性
ASTM D5026-15 Standard Test Method for Plastics:Dynamic mechanical properties:In Tension DMA 拉伸黏弹特性
ASTM D5418-15 Standard Test Method for Plastics:Dynamic mechanical properties:In Flexure(Dual Cantilever Beam) DMA 双悬臂式弯曲黏弹特性
ASTM D7028-07(2015) Standard Test Method for Glass Transition Temperature(DMA Tg) of Polymer Matrix Composites by Dynamic Mechanical Analysis(DMA) DMA 复合式材料测试波转移温度
ASTM E1640-18 Standard Test Method for Assignment of Glass Transition Temperature By Dynamic Mechanical Analysis DMA 测试玻璃转移温度
JIS K7244-4 Plastics – Determination of dynamic mechanical properties – Part 4:Tensile vibration--Non-resonance method DMA 拉伸黏弹特性
JIS K7244-5 Plastics – Determination of dynamic mechanical properties – Part 5:Flexural vibration--Non-resonance method DMA 弯曲黏弹特性

DMA分析聚合物的热特性
▲DMA分析聚合物的热特性
 
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