Pérez Ernesto, Angulo Irene, Blázquez-Blázquez Enrique, Cerrada María L
Instituto de Ciencia y Tecnología de Polímeros (ICTP-CSIC), Juan de la Cierva 3, 28006 Madrid, Spain.
Polymers (Basel). 2020 Nov 16;12(11):2708. doi: 10.3390/polym12112708.
Structuring at very high rates has become one of the current and important topics of interest in polymer science, because this is a common protocol in the processing of films or fibers with industrial applicability. This work presents the study by fast scanning calorimetry, FSC, of poly(vinylidene fluoride), paying special attention to the conditions for obtaining the β phase of this polymer, because it is the one technologically more interesting. The results indicate that this β phase of poly(vinylidene fluoride) is obtained when the sample is isothermally crystallized at temperatures below 60 °C. Under non-isothermal conditions, the β polymorph begins to be observed at rates above 400 °C/s, although a coexistence with the α modification is observed, so that exclusively the β phase is obtained only at rates higher than 3000 °C/s.
在非常高的速率下进行结构化已成为聚合物科学当前重要的研究热点之一，因为这是具有工业应用价值的薄膜或纤维加工中的常见方法。本工作通过快速扫描量热法（FSC）对聚偏二氟乙烯进行了研究，特别关注获得该聚合物β相的条件，因为β相在技术上更具吸引力。结果表明，当样品在低于60°C的温度下等温结晶时可获得聚偏二氟乙烯的β相。在非等温条件下，当升温速率高于400°C/s时开始观察到β晶型，不过会观察到与α晶型共存的情况，因此只有在高于3000°C/s的速率下才能单独获得β相。
