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- Title
Microstructural and thermal properties of fluoroelastomer/acidic surface modified carbon nanotube nanocomposites.
- Authors
Heidarian, Javad; Hassan, Aziz
- Abstract
Acid surface modified carbon nanotube (MCNT)-, carbon nanotube (CNT)-filled fluoroelastomer (FE), and unfilled-FE were prepared (MCNT/FE, CNT/FE, and FE). Dynamic mechanical analysis (DMA) and differential scanning calorimetry (DSC) showed that the glass transition temperature ( Tg) of MCNT/FE is less than that of CNT/FE and FE. The storage modulus of CNT/FE is higher than that of MCNT/FE over the whole temperature range. Storage modulus in rubbery state is higher in the case of MCNT/FE when compared to FE, however, in glassy state, it is slightly higher. For MCNT/FE at glassy and rubbery state, loss modulus is less than that of CNT/FE. Loss modulus in rubbery states is higher in the case of MCNT/FE compared to FE and in glassy states for both are the same. The DSC, DMA, and X-ray diffraction (XRD) results confirmed that the FE and filler/FE is partially crystalline mostly in γ-form. MCNT and CNT together with shear and high temperature, induced γ-crystallinity in the FE, γ-phase melting of MCNT/FE is higher than that of CNT/FE and FE. Most probably MCNT/FE obeys behaviors of thin films with high surface energy substrate interactions, while in CNT/FE the substrate surface energy is lower. XRD and DSC showed that MCNT causes more γ-crystallinity in FE compared to others. Tetrafluoroethylene segments crystals have the degree of crystallinity in the order of CNT/FE > MCNT/FE > FE. The γ-phase crystal size is in the order of FE > CNT/FE > MCNT/FE. XRD, DSC, and DMA results for FE and filler/FE confirmed each other. POLYM. COMPOS., 37:3341-3353, 2016. © 2015 Society of Plastics Engineers
- Subjects
MULTIWALLED carbon nanotube synthesis; MICROSTRUCTURE; FLUOROELASTOMERS; SHEAR strength; THERMAL properties of polymers
- Publication
Polymer Composites, 2016, Vol 37, Issue 12, p3341
- ISSN
0272-8397
- Publication type
Article
- DOI
10.1002/pc.23532