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首页> 外文期刊>Journal of Applied Polymer Science >Study of crystallization behavior of neat poly(vinylidene fluoride) and transcrystallization in carbon fiber/poly(vinylidene fluoride) composite under a temperature gradient
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Study of crystallization behavior of neat poly(vinylidene fluoride) and transcrystallization in carbon fiber/poly(vinylidene fluoride) composite under a temperature gradient

机译：温度梯度下纯净聚偏二氟乙烯的结晶行为和碳纤维/聚偏二氟乙烯复合材料的转结晶研究

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摘要

The crystallization behavior of poly(vinylidene fluoride) (PVDF) and transcrystallization in carbon fiber (CF)/PVDF composite were investigated under a temperature gradient. The crystallization temperature (T-c) was controlled in the range of 110-180 degrees C. For neat PVDF, the results showed that exclusive phase formed at T-c above 164 degrees C, but coexisted with phase at T-c ranging from 137 to 160 degrees C. The promotion of phase to nucleation of phase at low T-c was observed for the first time. For CF/PVDF composite, a cylindrical transcrystalline (TC) layer formed on the surface of CF when T-c was between 137 and 172 degrees C. The TC layer was exclusively composed of phase at T-c above 164 degrees C. The hybrid nucleation was dominated by phase though some phase nuclei emerged on the surface of CF when T-c was in the range of 144-160 degrees C. As T-c decreased, competition between the hybrid nucleation of and phase became more intense. The phase nuclei was soon circumscribed by the rapidly developed phase when T-c was below 144 degrees C. Furthermore, some phase nuclei were induced at the surface of the phase TC layer, and developed into phase TC layer when T-c was in the range of 146-156 degrees C, which resulted in a doubled TC layer of and phase at the interface of the composite. (c) 2016 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2016, 133, 43605.
机译：在温度梯度下研究了聚偏二氟乙烯（PVDF）的结晶行为和碳纤维（CF）/ PVDF复合材料中的转结晶。结晶温度（Tc）控制在110-180摄氏度范围内。对于纯净PVDF，结果显示，在164摄氏度以上的Tc处形成了排他相，但在137至160摄氏度的Tc处共存。首次观察到在低Tc下相向相核的促进作用。对于CF / PVDF复合材料，当Tc在137到172摄氏度之间时，在CF的表面上形成了一个圆柱形的跨晶（TC）层.TC层仅由164摄氏度以上的Tc处的相组成。杂化成核主要由当Tc在144-160摄氏度范围内时，尽管CF表面出现了一些相核。随着Tc的降低，α和α的混合成核之间的竞争变得更加激烈。当Tc低于144°C时，相核很快被快速发展的相所包围。此外，当Tc在146°C到146°C的范围内时，一些相核在相TC层的表面被诱导并发展为相TC层。 156摄氏度，导致复合材料界面的TC和TC层加倍。 （c）2016 Wiley Periodicals，Inc. J. Appl。 Polym。科学2016，133，43605。

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