Share Email Print
cover

Proceedings Paper • new

Influence of isocyanate index on the mechanical and dielectric properties of polyurea
Author(s): Yujiu Zhou; Yuetao Zhao; Wenyao Yang; Xin He; Xiling Mao; Yajie Yang; Jianhua Xu
Format Member Price Non-Member Price
PDF $17.00 $21.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

Polymer materials are preferred to show a high advantage for electrostatic capacitors energy storage and pulsed power applications. In this work, a linear material, aromatic polyurea, has been successfully synthesized by stepwise polycondensation, then films with different isocyanate index of 1.00, 1.03, 1.06 and 1.09 were prepared. The Young’s modulus increases with the increase of isocyanate index, which means that film with higher isocyanate index presents better mechanical property. The dielectric permittivity of samples with isocyanate index of 1.03, 1.06 and 1.09 are 3.72, 3.63, 3.79 respectively, more than 1.5 times high than Biaxially Oriented Polypropylene (BOPP). Film with isocyanate index of 1.06 presents highest energy storage efficiency because of the complete reaction and lower reaction monomer residual, which can be proved by FTIR and the dielectric loss. At 3000 kV/cm electric filed, sample with isocyanate index of 1.06 still shows a very high energy storage efficiency of 89%. Considering the comprehensive property, polyurea film with isocyanate index of 1.06 is promising for high performance pulse capacitors application.

Paper Details

Date Published: 8 February 2019
PDF: 5 pages
Proc. SPIE 10843, 9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging, 108430Q (8 February 2019); doi: 10.1117/12.2506334
Show Author Affiliations
Yujiu Zhou, Univ. of Electronic Science and Technology of China (China)
Yuetao Zhao, Univ. of Electronic Science and Technology of China (China)
Wenyao Yang, Chongqing Univ. of Arts and Sciences (China)
Xin He, Univ. of Electronic Science and Technology of China (China)
Xiling Mao, Univ. of Electronic Science and Technology of China (China)
Yajie Yang, Univ. of Electronic Science and Technology of China (China)
Jianhua Xu, Univ. of Electronic Science and Technology of China (China)


Published in SPIE Proceedings Vol. 10843:
9th International Symposium on Advanced Optical Manufacturing and Testing Technologies: Optoelectronic Materials and Devices for Sensing and Imaging
Yadong Jiang; Xiaoliang Ma; Xiong Li; Mingbo Pu; Xue Feng; Bernard Kippelen, Editor(s)

© SPIE. Terms of Use
Back to Top