Thermal Analysis of Plastics.
Thermal Analysis of Plastics.
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DOI：
10.1021/ed085p404
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发表时间：
2008-03
影响因子：
3
通讯作者：
T. D'Amico;C. J. Donahue;Elizabeth A. Rais
中科院分区：
文献类型：
--
作者：
T. D'Amico;C. J. Donahue;Elizabeth A. Rais
本实验室实验演示了差示扫描量热仪(DSC)和热重分析(TGA)在聚合物性能测量中的应用。总共描述了七个练习。这些都是枯燥的练习：学生们解读之前录制的扫描。他们不会进行这些实验。用差示扫描量热仪(DSC)测定了一根PP狗骨在Instron拉伸机上拉伸前后的结晶度百分比。利用差示扫描量热仪(DSC)测定了聚对苯二甲酸乙二醇酯(PET)预制体的结晶度，并与PET汽水瓶进行了比较。利用差示扫描量热仪(DSC)研究了不同相对分子质量对一系列聚苯乙烯标样玻璃化转变温度的影响。采用差示扫描量热法和红外光谱分析相结合的方法对汽车前灯和尾灯中的塑料进行了鉴定。同样的两种技术也被用来检查两个商业尼龙样品：钓鱼线和茶包。用热重分析法(TGA)考察了一系列PP中填充补强的含量。
This lab experiment illustrates the use of differential scanning calorimetry (DSC) and thermal gravimetric analysis (TGA) in the measurement of polymer properties. A total of seven exercises are described. These are dry exercises: students interpret previously recorded scans. They do not perform the experiments. DSC was used to determine the percent crystallinity of a polypropylene (PP) dog bone before and after it was pulled on an Instron machine. Using DSC, the percent crystallinity of a polyethylene terephthalate (PET) preform was determined and compared with a PET pop bottle. DSC was also used to explore the effect of molecular weight on the glass transition temperature of a series of polystyrene standards. Using a combination of DSC and IR spectroscopy the plastics in automobile headlights and taillights were identified. The same two techniques were also used to examine two commercial nylon samples: fishing line and a tea bag. TGA was used to examine the filler-reinforcement content in a series of PP...