Improvement of Piezoelectricity of Poly(L-lactide) Film by Using Acrylic Symmetric Block Copolymer as Additive

• Yuki Shiomi

• Katsuki Onishi

• Takuo Nakiri

• Kenji Imoto

• Fumi Ariura

• Atsushi Miyabo

• Munehiro Date

• Eichi Fukada

• Yoshiro Tajitsu

Abstract

By using additives to change the higher-order structure of a poly(L-lactide) (PLLA) film, an improvement in its piezoelectricity was realized. The additive used was a triblock copolymer, which is a pure acrylic symmetric block copolymer consisting of a center block of poly(butyl acrylate) (PBA), corresponding to its soft part, and two side blocks of poly(methyl methacrylate) (PMMA), corresponding to its hard part. The triblock copolymer is hereafter denoted as PMMA- b -PBA- b -PMMA. The piezoelectric e -constant of the PLLA film with added PMMA- b -PBA- b -PMMA (PLLA/PMMA–PBA–PMMA film) was over two times higher than that of the PLLA film without adding PMMA- b -PBA- b -PMMA (reference PLLA film). Also, we found that the glass transition temperature increases with increasing PMMA- b -PBA- b -PMMA content. From atomic force microscopy (AFM) images, it was found that a new higher-order structure was formed in the PLLA/PMMA–PBA–PMMA film with high piezoelectricity. The method of using PMMA- b -PBA- b -PMMA has high productivity and its promising for industrial use.

Journal

• Japanese Journal of Applied Physics

  Japanese Journal of Applied Physics 52 (9S1), 09KE02-, 2013-09-01

  IOP Publishing

Keywords

• General Physics and Astronomy
• General Engineering

Details

• CRID: 1360003449887807872
• NII Article ID: 210000142858
• DOI: 10.7567/jjap.52.09ke02
• ISSN: 13474065
• ISSN: 00214922
• ISSN: http://id.crossref.org/issn/13474065
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.09KE02
• Web Site: https://iopscience.iop.org/article/10.7567/JJAP.52.09KE02/pdf
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  • KAKEN