Nanostructured poly(vinylidene fluoride) materials by melt blending with several percent of acrylic rubber
Nanostructured poly(vinylidene fluoride) materials by melt blending with several percent of acrylic rubber
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DOI：
10.1021/ma7027402
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发表时间：
2008-05-13
期刊：
影响因子：
5.5
通讯作者：
Shimizu, Hiroshi
中科院分区：
文献类型：
--
作者：
Li, Yongjin;Wakura, Yuko;Shimizu, Hiroshi
采用熔融共混法制备了纳米结构聚偏氟乙烯（PVDF）/丙烯酸酯橡胶（ACM）共混物。通过透射电子显微镜（TEM）、动态力学分析（DMA）、差示扫描量热法（DSC）和偏光显微镜（POM）研究了所制备的纳米共混物的形态和性能。结果表明，ACM在PVDF基体中均匀分散，且大部分粒径小于100 nm。所制备的纳米共混物显示出韧性和刚度之间的独特平衡。与纯PVDF相比，加入少量ACM的纳米共混物的冲击强度和断裂伸长率有较大幅度的提高，而弹性模量则略有下降。研究结果表明，纳米分散的ACM微区不仅对PVDF起到了增韧剂的作用，而且显著提高了PVDF的结晶速度，减小了PVDF的球晶尺寸，从而显著提高了PVDF的冲击强度和断裂伸长率。
Nanostructured poly(vinylidene fluoride) (PVDF)/acrylic rubber (ACM) blends have been prepared by simply melt blending of PVDF and several percent of ACM. The morphology and properties of the prepared nanoblends have been investigated by means of transmission electron microscopy (TEM), dynamic mechanical analysis (DMA), differential scanning calorimetry (DSC), and polarized optical microscopy (POM). It was found that ACM has been precisely dispersed in PVDF matrix with most of the particle size of less than 100 nm. The prepared nanoblends show a unique balance between the toughness and the stiffness. The impact strength and elongation at break of the nanoblends by adding small amount of ACM increase greatly, while there is only a little decreasing in the modulus, by comparing with neat PVDF. The investigation results indicate that the nanodispersed ACM domains not only take the role of the toughening agent for PVDF but also markedly increase the crystallization speed and reduce the spherulite size of PVDF, which also contributes greatly to the enhancement of the impact strength and elongation at break.