| 发明名称 |
POLYMERIC PIEZOELECTRIC MATERIAL, AND PROCESS FOR PRODUCING THE SAME |
| 摘要 |
Provided is a process for producing a polymeric piezoelectric material including a first step of heating a sheet in an amorphous state containing the helical chiral polymer to obtain a pre-crystallized sheet, and a second step of stretching the pre-crystallized sheet in biaxial directions, wherein the polymeric piezoelectric material includes a helical chiral polymer having a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, wherein a crystallinity of the material measured by a DSC method is from 20% to 80%, and a product of a standardized molecular orientation MORc measured by a microwave transmission type molecular orientation meter based on a reference thickness of 50 μm and the crystallinity is from 25 to 250. |
| 申请公布号 |
US2016380180(A1) |
申请公布日期 |
2016.12.29 |
| 申请号 |
US201615263862 |
申请日期 |
2016.09.13 |
| 申请人 |
Mitsui Chemicals, Inc. |
发明人 |
YOSHIDA Mitsunobu;NISHIKAWA Shigeo;SHIMIZU Masaki;FUKUDA Hiroshi |
| 分类号 |
H01L41/45;B29C71/02;B29C55/00;B29C55/16;C08G63/08;B29C35/02 |
主分类号 |
H01L41/45 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A process for producing a polymeric piezoelectric material comprising a first step of heating a sheet in an amorphous state containing the helical chiral polymer to obtain a pre-crystallized sheet, and a second step of stretching the pre-crystallized sheet in biaxial directions, wherein
the polymeric piezoelectric material comprises a helical chiral polymer having a weight-average molecular weight of from 50,000 to 1,000,000 and having optical activity, wherein a crystallinity of the material measured by a DSC method is from 20% to 80%, and a product of a standardized molecular orientation MORc measured by a microwave transmission type molecular orientation meter based on a reference thickness of 50 μm and the crystallinity is from 25 to 250. |
| 地址 |
Tokyo JP |
