Development of Polymeric Films with Piezoelectrical Properties from Polypeptides; Low, Odd Nylons; or Polyureas.
Abstract
A 33-month project was undertaken to study piezoelectricity in low, odd nylons; odd, odd nylons; polyureas; and polypeptides. The commercially available polypeptides poly(L alanine), poly(L valine), and poly(L asparagine) were apparently not of sufficiently high molecular weight to provide usable films for piezoelectric testing. Likewise, the polyureas we synthesized-poly(trimethyleneurea), poly(pentamethyleneurea), and poly(1,2-propylene diisocynate)-were also poor film-forming materials. Consequently, we devoted most of our efforts to synthesizing film-forming nylons. High molecular-weight nylon 5 was prepared via anionic ring-opening polymerization of piperidone. Films of high quality were solvent cast from trifluoroethanol, and these films were poled in the presence and absence of a plasticizer (2-ethyl-1,3-hexanediol). The highest values of the piezoelectric strain (d31) and stress (e31) constants obtained were for plasticized nylon 5-1.3 pC/N and 2.8 mC/m2 respectively. Keywords: Piezoelectricity, Polyamides, Polypeptides, Poly(Amino Acids), Polyureas, Nylon.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1987
- Accession Number
- ADA190301
Entities
People
- David P. Vanderbilt
- Gerald W. Mcneely
- James P. English
Organizations
- Southern Research