| 查看: 395 | 回复: 0 | |||
[交流]
运用热分析分析热塑性材料的物理性质
|
|
Thermal Analysis is the generic name for a series of measurement techniques traditionally used to determine changes in material properties with temperature. Common thermal analysis techniques include: - Differential Scanning Calorimetry (DSC) - is the most widely used thermal analysis technique. DSC measures the heat flow in materials and provides information about phase changes (amorphous and crystalline transitions) as well as chemical changes (degradation and reactions). - Thermogravimetric Analysis (TGA) - measures weight changes associated with thermal events. While TGA is most commonly used to determine compositional analysis, it is also valuable for determining thermal stability. Furthermore, by analyzing multiple TGA curves obtained under different heating rates, it is possible to predict long-term as well as short-term thermal stability. - Dynamic Mechanical Analysis (DMA) - measures the storage or elastic modulus and the loss or viscous modulus of materials subjected to sinusoidal or static stresses. - Dielectric Analysis (DEA) - is the electrical analog of DMA in which the current (phase and magnitude) resulting from a sinusoidally imposed voltage are measured. Because mechanical and electrical properties are highly sensitive to small changes in material internal structures, DMA and DEA are more sensitive to low energy transitions, such as the glass transitions of filled epoxy systems, than are other thermal analysis methods. The static stress modes of the DMA further allow long term strength forecasts to be made using the creep or stress relaxation methods at elevated temperatures. In this paper, the short-term and long-term physical properties of two engineering thermoplastics are explored. The results illustrate the value of thermal analysis for characterizing thermoplastic materials. |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : 运用热分析分析热塑性材料的物理性质.PDF
2016-04-05 14:44:01, 336.17 K
» 猜你喜欢
售SCI一区T0P文章，我:8.O.55.1.O54,科目全,可伽急
已经有3人回复
-
浙江师范大学是怎么坑我的
已经有7人回复
-
求教各位大神：2026教育部人文社科青年基金项目何时公示呀？
已经有6人回复
-
面上有专家说实验设备不是我们单位的
已经有8人回复
-
科研求助
已经有4人回复
-
博士去二本高校当辅导员，如何调整心态？
已经有11人回复
-
江苏省自然基金 什么时候出结果
已经有6人回复
-
闲聊
已经有3人回复
» 本主题相关商家推荐: (我也要在这里推广)
