Toughening of Nylon-6 by Semicrystalline Poly(vinylidene fluoride): Role of Phase Transformation and Fibrillation of Dispersed Particles

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• 作者：Bing Na ; Wenfei Xu ; Ruihua Lv ; Zhujun Li ; Nana Tian ; Shufen Zou
• 刊名：Macromolecules
• 出版年：2010
• 出版时间：April 27, 2010
• 年：2010
• 卷：43
• 期：8
• 页码：3911-3915
• 全文大小：830K
• 年卷期：v.43,no.8(April 27, 2010)
• ISSN：1520-5835

文摘

Superior toughness has been achieved in the nylon-6/PVDF blends with semicrystalline PVDF component as the dispersed particles. Morphological observations on the impact tested specimens unambiguously reveal the formation of voids and microfibrils across the fracture surface, suggesting that some extent of plastic deformation occurs within ductile PVDF particles. It is further confirmed by the structural evolution at crack tips through micro-FTIR studies on the quasi-static stretching of precracked films. During fracture α → β phase transformation of dispersed PVDF particles first takes place, followed by the extensive plastic deformation and fibrillation of new-formed β-crystals. It is believed that the α → β phase transformation and fibrillation of β-crystals of the dispersed PVDF particles are responsible for the toughness enhancement in the nylon-6/PVDF blends with good interfacial adhesion.