Changes in structural and mechanical behaviour of PVDF with processing or thermal treatment.: 2. Evolution of mechanical behaviour
Changes in structural and mechanical behaviour of PVDF with processing or thermal treatment.: 2. Evolution of mechanical behaviour
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DOI：
10.1016/s0032-3861(01)00184-7
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发表时间：
2001-07
期刊：
影响因子：
4.6
通讯作者：
Badr Eddine El Mohajir;N. Heymans
中科院分区：
文献类型：
--
作者：
Badr Eddine El Mohajir;N. Heymans
以下研究是我们以前工作的继续，包括分析PVDF在不同热机械处理后的结构演变。在第二部分中，我们将讨论这些演化对力学行为的影响。这是通过拉伸、蠕变或动态测量确定的。观察到的行为变化受到不同加工路线的强烈影响。因此，β构象仅在拉伸注塑成型样品（IM）时出现，并且伴随着断裂应力与屈服应力相比的增加，而压缩样品（CM）的情况并非如此。退火对力学行为的影响随退火温度和测量温度而变化。因此，与其他退火处理相比，标准化后在80°C下退火增加了120°C下的杨氏模量，并在23°C下拉伸期间降低了杨氏模量。
The following study is the continuation of our previous work, which consisted in analysing the structural evolution of PVDF after different thermomechanical treatments. In this second part, we will discuss the influence of these evolutions on the mechanical behaviour. This has been determined by tensile drawing, creep or dynamic measurements.The observed changes in behaviour are strongly influenced by the different processing routes. Therefore, the beta conformation appears only when stretching injection-moulded samples (IM) and is accompanied by an increase of rupture stress compared to yield stress, which is not the case for compressed samples (CM). The influence of annealing on mechanical behaviour varies with annealing and measurement temperature. Thus, annealing at 80°C after standardisation increases the Young's modulus at 120°C and decreases it during drawing at 23°C compared to other annealing treatments.