| 摘要 |
PROBLEM TO BE SOLVED: To provide a polymer piezoelectric material which maintains piezoelectricity at a high level and is excellent in thickness accuracy.SOLUTION: A polymer piezoelectric material contains: a helical chiral polymer (A) having optical activity when the weight average molecular weight is 50,000 to 1,000,000; and a compound (B). The compound (B) is at least one kind selected from the group consisting of a hindered phenolic compound, a hindered-amine compound, a phosphite based compound and a thio-ether compound. When the reference thickness measured by a microwave transmission type molecular orientation meter is 50 μm, the standardized molecular orientation MORc is 3.5 to 15.0 and the degree of crystallinity obtained by a DSC method is 20% to 80%. |
