α - to - β transformation on PVDF films obtained by uniaxial stretch

α - to - β transformation on PVDF films obtained by uniaxial stretch

The α to β phase transformation of PVDF through the stretching process at different temperatures was investigated. The optimum stretching conditions were studied and characterised by infrared spectroscopy and differential scanning calorimetry. The maximum β−phase content was achieved at 80ºC and a s...

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Veröffentlicht in:Advanced materials forum III : proceedings of the III International Materials Symposium Materiais 2005 and XII Encontro da Sociedade Portuguesa de Materiais - SPM Universidade de Aveiro, March 20-23, Aveiro, Portugal, 2005 March 20-23, Aveiro, Portugal, 2005, 2006-01, Vol.514-516 (PART 2), p.872-876
Hauptverfasser: Sencadas, Vítor João Gomes Silva, Moreira, V., Lanceros-Méndez, S., Pouzada, A. S., Gregório Júnior, R.
Format: Artikel
Sprache:eng
Schlagworte:
Ferroelectrics
FTIR
Mechanical properties
Polymers
PVDF
Science & Technology
SEM
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Zusammenfassung:The α to β phase transformation of PVDF through the stretching process at different temperatures was investigated. The optimum stretching conditions were studied and characterised by infrared spectroscopy and differential scanning calorimetry. The maximum β−phase content was achieved at 80ºC and a stretch ratio of 5. Accompanying the phase transformation, a orientation of the polymer chains and a packing of the crystalline structure is observed. The stretch ratio does not significantly affect the degree of crystallinity. GRICES/FAPESP (Proc. 4.1.3/FAPESP). EU-ALFA project Plastinet. Fundação para a Ciência e a Tecnologia (FCT) - Grants POCTI/CTM/33501/2000, POCI/CTM/59425/2004.
ISSN:0255-5476
1662-9752
1662-9752
DOI:10.4028/www.scientific.net/MSF.514-516.872