Annealing effects on crystal structure and ferroelectric properties in aromatic polyurethane

被引：7

作者：

Jayasuriya, AC

Tasaka, S

Inagaki, N

机构：

来源：

POLYMER | 1998年 / 39卷 / 02期

关键词：

polyurethanes; ferroelectric properties; crystal structure;

D O I：

10.1016/S0032-3861(97)00289-9

中图分类号：

O63 [高分子化学（高聚物）];

学科分类号：

070305 ; 080501 ; 081704 ;

摘要：

Annealing effects on ferroelectric properties of an aromatic polyurethane (m-xylene nonamethylene dicarbamate, PUMX-9) were studied. X-ray diffractometry showed that the crystallinity of PUMX-9 increased during annealing. Both quenched and annealed polyurethane samples showed a similar electric displacement (D) versus electric field (E) hysteresis loop. Furthermore, the remanent polarization obtained from the D-E loop was slightly changed by annealing. The experimental results suggest that the ferroelectric properties of this polyurethane arise not in the crystal phase but in a well-hydrogen-bonded amorphous phase which behaves like crystals with large numbers of defects. (C) 1997 Elsevier Science Ltd.

引用

页码：455 / 458

页数：4

共 14 条

[1] STRUCTURAL AND DIELECTRIC INVESTIGATION ON THE NATURE OF THE TRANSITION IN A CO-POLYMER OF VINYLIDENE FLUORIDE AND TRIFLUOROETHYLENE (52/48 MOL-PERCENT) [J].