公开(公告)号：US20240084121A1

公开(公告)日：2024-03-14

申请号：US18174920

申请日：2023-02-27

Applicant: Meta Platforms Technologies, LLC

Inventor： Sheng Ye ,  Jinghui Yang ,  Rui Jian ,  Hao Mei ,  Andrew John Ouderkirk ,  Christopher Yuan Ting Liao ,  Stephen Hsieh ,  Alexander Keener ,  Jonathan Robert Peterson

IPC: C08L27/12 ,  B29C48/00 ,  B29K27/12

CPC classification number: C08L27/12 ,  B29C48/022 ,  H10N30/857 ,  B29K2027/12 ,  C08L2203/16 ,  C08L2205/16

Abstract: A mechanically and piezoelectrically anisotropic polymer article is formed from a crystallizable fluoropolymer and a nucleating agent. The polymer article may be a thin film or a fiber, for example. A crystalline phase may constitute at least approximately 50% of the polymer article. In certain examples, a fluoropolymer may include vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, hexafluoropropylene, and vinyl fluoride. The polymer article may include up to approximately 10 wt. % of the nucleating agent. Such a polymer article is optically transparent, has an elastic modulus of at least approximately 3 GPa, and an electromechanical coupling factor (k31) of at least approximately 0.15.