Selection and optimization of piezoelectric polyvinylidene fluoride polymers for adaptive optics in space environments


Autoria(s): Celina, Mathew; Dargaville, Tim R.; Assink, Roger A.; Martin, Jeffrey W.
Data(s)

2005

Resumo

Various piezoelectric polymers based on polyvinylidene fluoride (PVDF) are of interest for large aperture space-based telescopes. Dimensional adjustments of adaptive polymer films depend on charge deposition and require a detailed understanding of the piezoelectric material responses which are expected to deteriorate owing to strong vacuum UV, � -, X-ray, energetic particles and atomic oxygen exposure. We have investigated the degradation of PVDF and its copolymers under various stress environments detrimental to reliable operation in space. Initial radiation aging studies have shown complex material changes with lowered Curie temperatures, complex material changes with lowered melting points, morphological transformations and significant crosslinking, but little influence on piezoelectric d33 constants. Complex aging processes have also been observed in accelerated temperature environments inducing annealing phenomena and cyclic stresses. The results suggest that poling and chain orientation are negatively affected by radiation and temperature exposure. A framework for dealing with these complex material qualification issues and overall system survivability predictions in low earth orbit conditions has been established. It allows for improved material selection, feedback for manufacturing and processing, material optimization/stabilization strategies and provides guidance on any alternative materials.

Identificador

http://eprints.qut.edu.au/33107/

Publicador

SAGE Publications

Relação

DOI:10.1177/0954008305052206

Celina, Mathew, Dargaville, Tim R., Assink, Roger A., & Martin, Jeffrey W. (2005) Selection and optimization of piezoelectric polyvinylidene fluoride polymers for adaptive optics in space environments. High Performance Polymers, 17(4), pp. 575-592.

Fonte

Faculty of Science and Technology

Palavras-Chave #030300 MACROMOLECULAR AND MATERIALS CHEMISTRY #090100 AEROSPACE ENGINEERING #091200 MATERIALS ENGINEERING #Polyvinylidene fluoride (PVDF) #polymer #materials performance #space environment #exposure #selection #characterization
Tipo

Journal Article