Abstract Temperature dependences of internal friction Q−1 and elastic modulus E of the VDF60Tr40 copolymer were studied in the temperature range of 20–100 °C at a frequencies f ≈ 3–17 Hz. A distinct softening of the modulus E was found near the Curie temperature. In the vicinity of 60 °C, a wide maximum of Q−1 is revealed, which is a superposition of two Q−1 peaks. The “low-temperature” peak of internal friction is due to the process of α-relaxation in the non-crystalline polymer fraction. “High-temperature” one is associated with a first-order ferroelectric phase transition in the crystalline fraction.

中文翻译：

---

偏二氟乙烯-三氟乙烯 (VDF-Tr) 共聚物在相变附近的弹性和非弹性性能

摘要 研究了 VDF60Tr40 共聚物的内摩擦 Q-1 和弹性模量 E 在 20-100 °C 温度范围内，频率 f ≈ 3-17 Hz 的温度依赖性。在居里温度附近发现模量 E 的明显软化。在 60 °C 附近，显示出 Q-1 的宽最大值，这是两个 Q-1 峰的叠加。内摩擦的“低温”峰是由于非结晶聚合物部分的α-弛豫过程。“高温”相与结晶部分的一级铁电相变有关。