Effect of the Mixing on the Dielectric Constant of Poly(vinylidene fluoride)/Isotactic Polypropylene Blends - Université de Lorraine Accéder directement au contenu
Article Dans Une Revue SCIENCE OF ADVANCED MATERIALS Année : 2013

Effect of the Mixing on the Dielectric Constant of Poly(vinylidene fluoride)/Isotactic Polypropylene Blends

Résumé

In this work, the effect of a mixing process on the dielectric constant (epsilon) of a typical immiscible blend, poly(vinylidene fluoride) (PVDF)/isotactic polypropylene (iPP), is investigated. An iPP with a relatively low epsilon (ca. 3.4) is added to a PVDF matrix with a relatively high epsilon (ca. 9.5) to reduce the 8 of the system. The blend has a narrow window of cocontinuity (volume fraction of iPP (v(iPP)) of ca. 50-80 vol%). All of the measured epsilon values for the blends lie within the two limits defined by the parallel alignment and series alignment models, which are the upper and lower limits, respectively. It is found that for blends with v(iPP) of ca. 39.7 vol%, for which PVDF is the continuous matrix and iPP is the dispersed phase, prolonging mixing time and adding compatibilizer cause a monotonic decrease of epsilon for the system, which can be attributed to the increasing dispersion of the low-epsilon iPP filler in the high-epsilon PVDF matrix. Based on these results, a strategy to tune the epsilon of polymer blends and composites is discussed. It is suggested that architecture similar to a series alignment will favor the decrease of epsilon, while architecture similar to a parallel alignment will favor the increase of epsilon.

Domaines

Chimie
Fichier non déposé

Dates et versions

hal-01282210 , version 1 (03-03-2016)

Identifiants

Citer

Jun Zhao, Xiaoqing Yin, Jingdan Shi, Xiaodong Zhao, Xiaoyan Wang, et al.. Effect of the Mixing on the Dielectric Constant of Poly(vinylidene fluoride)/Isotactic Polypropylene Blends. SCIENCE OF ADVANCED MATERIALS, 2013, 5 (5), pp.505-511. ⟨10.1166/sam.2013.1481⟩. ⟨hal-01282210⟩
83 Consultations
0 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More