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Melt Crystallization of Nanocomposites of Poly(Vinylidene Fluoride) with OMS

Published online by Cambridge University Press:  01 February 2011

Bedriye Seyhan Ince-Gunduz ,
Debeshu Amare ,
Robert Alpern ,
Peggy Cebe ,
Jennifer Crawford ,
Breanna Dolan ,
Stacey Jones ,
Ryan Kobylarz  and
Matthew Reveley
Bedriye Seyhan Ince-Gunduz
Affiliation:
[email protected], Tufts University, Physics, STC-214 4 Colby St., Medford, MA, 02155, United States, 617-627-3471, 617-627-3744
Debeshu Amare
Affiliation:
Tufts University, Medford, MA, 02155, United States
Robert Alpern
Affiliation:
Tufts University, Medford, MA, 02155, United States
Peggy Cebe
Affiliation:
[email protected], Tufts University, Medford, MA, 02155, United States
Jennifer Crawford
Affiliation:
Tufts University, Medford, MA, 02155, United States
Breanna Dolan
Affiliation:
Tufts University, Medford, MA, 02155, United States
Stacey Jones
Affiliation:
Tufts University, Medford, MA, 02155, United States
Ryan Kobylarz
Affiliation:
Tufts University, Medford, MA, 02155, United States
Matthew Reveley
Affiliation:
[email protected], Tufts University, Medford, MA, 02155, United States
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Abstract

In our previous work [1] we investigated the impact of cold-crystallization on the structure of nanocomposites of PVDF with Lucentite STN™ OMS and observed the crossover composition in which the crystallographic beta phase dominated over alpha phase. Here, melt crystallization of PVDF/OMS nanocomposites was studied in the range of 0 to 1.0 wt% of OMS. In crystallization from melt, a decrease in crystallinity index occurs as a result of an increase in OMS. While beta phase fraction increased with an increase of OMS content in the range of interest, the amount of alpha crystals was found to be dominant even at high OMS compositions. At 1.0 wt% of OMS, beta crystals had reached at most 30% of the total crystallinity. Polarizing optical microscopy (POM) studies showed smaller, less birefringent spherulites with higher melting temperature compared to alpha spherulites appeared with OMS addition. Growth rate of these weakly birefringent spherulites is smaller than that of the strongly birefringent alpha spherulites. The increase in size and amount of the weakly birefringent spherulites with an increase of OMS and their higher melting point suggests these spherulites may be in the beta crystallographic phase.

Keywords

polymermorphologycrystalline
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 949: Symposium C – Smart Dielectric Polymer Properties, Characterization and Their Devices , 2006 , 0949-C03-05
Copyright
Copyright © Materials Research Society 2007

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References

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