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Molecular Dynamics of Polyfarnesene
- Source :
- Macromolecules. 51:4917-4922
- Publication Year :
- 2018
- Publisher :
- American Chemical Society (ACS), 2018.
-
Abstract
- This paper represents the first comprehensive report of the molecular weight dependence of the dynamics of polyfarnesene (PF), utilizing oscillatory shear rheology and broadband dielectric spectroscopy. Extended PF chain conformations arising from tightly packed C11/C13 pendant groups reduce the probability of chain entanglements and lead to Rouse-like melt dynamics up to a critical molecular weight ∼105 g/mol. At higher molecular weights, PF behaves as an entangled polymer melt. Dielectric spectroscopy measurements establish PF as a type-A polymer, whose normal mode relaxation is strongly dependent on molecular weight, providing a compliment to melt rheology for the exploration of PF global chain dynamics.
- Subjects :
- chemistry.chemical_classification
Materials science
Polymers and Plastics
Molecular mass
Organic Chemistry
Relaxation (NMR)
02 engineering and technology
Polymer
010402 general chemistry
021001 nanoscience & nanotechnology
01 natural sciences
0104 chemical sciences
Dielectric spectroscopy
Condensed Matter::Soft Condensed Matter
Inorganic Chemistry
Molecular dynamics
Rheology
chemistry
Chain (algebraic topology)
Normal mode
Chemical physics
Materials Chemistry
0210 nano-technology
Subjects
Details
- ISSN :
- 15205835 and 00249297
- Volume :
- 51
- Database :
- OpenAIRE
- Journal :
- Macromolecules
- Accession number :
- edsair.doi...........3fc171d7ea7e6f3773af2ac52fb74a76