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Preparation, structure, and property of highly filled polyamide 11/BaTiO 3 piezoelectric composites prepared through solid‐state mechanochemical method
Author(s) -
Hua Zhengkun,
Shi Xianrui,
Chen Yinghong
Publication year - 2019
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.24566
Subject(s) - materials science , composite material , composite number , differential scanning calorimetry , volume fraction , barium titanate , piezoelectricity , polyamide , thermal stability , dielectric , crystallization , ceramic , chemical engineering , physics , optoelectronics , engineering , thermodynamics
In this article, a piezoelectric polymer composite consisting of polyamide 11 (PA11) and high loading of barium titanate (BT) particles was prepared through solid‐state shear milling method based on a pan‐type milling equipment. The structure and performance of the prepared PA11/BT composite were investigated by using scanning electronic microscopy (SEM), X‐ray diffraction (XRD), differential scanning calorimetry (DSC), thermal gravimetric analysis (TGA), piezoelectric test, and mechanical measurement. Experimental results showed that high loading of BT particles were homogeneously dispersed in PA11 matrix under the strong shear force field of pan‐milling. Besides, the addition of BT changed the crystallization behavior of PA11 matrix and increased its thermal stability also. The dielectric constant of the prepared PA11/BT composites dropped with increase of the frequency. However, it increased remarkably with increase of the BT volume fraction. In addition, a linear increase was found in piezoelectric strain coefficient d 33 with increase of the BT volume fraction. For example, d 33 could reach 1.1 pC/N and 6.6 pC/N at the BT loading of 5 and 50 vol%, respectively. The obtained composite still showed good mechanical properties even when the BT volume fraction increased to 20 vol%. POLYM. COMPOS., 40:E177–E185, 2019. © 2017 Society of Plastics Engineers