An experimental study of dynamic behaviour of graphite–polycarbonatediol polyurethane composites for protective coatings
Source abstract
Abstract
Abstract Segmented polycarbonatediol polyurethane (PUPH) has been synthesized and modified with different amounts of graphite conductive filler (from 0 to 50 wt%). Thermal and dynamical thermal analysis of the composites clearly indicates changes in the polyurethane relaxations upon addition of graphite. Broadband dielectric spectroscopy has been used to study the dielectric properties of the (PUPH) and one composite in the frequency range from 10−2 to 107 Hz and in the temperature window of −140 to 170 °C. Relaxation processes associated with different molecular motions and conductivity phenomena (Maxwell–Wagner–Sillars and electrode polarization) are discussed and related to the graphite content.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Conducting polymers and applications · Polymer Nanocomposites and Properties · Polymer crystallization and properties
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References (36)
Show source-provided references
1. Thermal conductive and electrical properties of polyurethane/hyperbranched poly(urea-urethane)-grafted multi-walled carbon nanotube composites10.1016/j.compositesb.2011.05.005 ↗
2. Preparation of polystyrene/graphite nanosheet composite10.1016/S0032-3861(03)00050-8 ↗
3. A novel way of enhancing the electrical and thermal stability of conductive epoxy resin-carbon black composites via the joule heating effect for heating-element applications10.1002/app.10851 ↗
4. Conductive graphite/polyurethane composite films using amphiphilic reactive dispersant: synthesis and characterization10.1016/j.jiec.2007.09.004 ↗
5. Electromagnetic shielding by composite films prepared with carbon fiber, Ni nanoparticles, and multi-walled carbon nanotubes in polyurethane10.2320/matertrans.M2009408 ↗
6. EIS study on failure process of two polyurethane composite coatings10.1016/j.porgcoat.2010.04.017 ↗
7. Waterborne polyurethane dispersions obtained with polycarbonate of hexanediol intended for use as coatings10.1016/j.porgcoat.2011.01.006 ↗
8. Synthesis of optical transparent and electrical conductive polymer/nanocarbon composite films by infiltration method10.1016/j.tsf.2011.01.361 ↗
9. Preparation and optical/electrical/electrochemical properties of expanded graphite-filled polypyrrole nanocomposite10.1016/j.matchemphys.2011.03.013 ↗
10. Thermal, mechanical, and dielectric properties of graphite reinforced poly(vinylidene fluoride) composites10.1016/j.polymertesting.2008.08.010 ↗
11. Expanded graphite-based electrically conductive composites as bipolar plate for PEM fuel cell10.1016/j.ijhydene.2008.09.004 ↗
12. Microdomain composition and properties differences of biodegradablepolyurethanes based on MDI and HDI10.1002/pen.20983 ↗
13. Chlorinated polyurethanes based on 2,4-toluenediisocyanate: thermal analysis and flammability evaluation10.1002/(SICI)1097-4628(19980222)67:8<1465::AID-APP12>3.0.CO;2-0 ↗
14. Thermal-degradation of segmented polyurethanes10.1002/app.1994.070510615 ↗
15. Nanocomposites based on vapor-grown carbon nanofibers and an epoxy: functionalization, preparation and characterization10.1016/j.eurpolymj.2010.04.025 ↗
16. Preparations, thermal properties, and Tg increase mechanism of inorganic/organic hybrid polymers based on polyhedral oligomeric silsesquioxanes10.1021/ma0202843 ↗
17. Glass transition behavior of alumina/polymethylmethacrylate nanocomposites10.1016/S0167-577X(01)00626-7 ↗
18. Molecular dynamics in nanostructured polyimide-silica hybrid materials and their thermal stability10.1002/polb.10162 ↗
19. The glass transition and interfacial layer in styrene–butadiene rubber containing silica nanofiller10.1016/S0032-3861(03)00667-0 ↗
20. Glass-transition temperature behavior of alumina/PMMA nanocomposites10.1002/polb.20297 ↗
21. Synthesis of epoxy-montmorillonite nanocomposite10.1002/app.10986 ↗
22. PP/clay nanocomposites prepared by grafting-melt intercalation10.1016/S0032-3861(01)00561-4 ↗
23. The amount of immobilized polymer in PMMA SiO(2) nanocomposites determined from calorimetric data10.1016/j.eurpolymj.2007.05.011 ↗
24. The heat capacity of filled, amorphous polymers10.1016/0032-3950(79)90256-9 ↗
25. Synthesis and characterization of PMMA nanocomposites by suspension and emulsion polymerization10.1021/ma001670s ↗
26. Glass transition in filled polymer systems10.1016/0032-3950(72)90286-9 ↗
27. Interplay of surface and confinement effects on the molecular relaxation dynamics of nanoconfined poly(methyl methacrylate) chains10.1140/epje/i2004-10015-3 ↗
28. Glass transition and segmental dynamics in poly(dimethylsiloxane)/silica nanocomposites studied by various techniques10.1016/j.jnoncrysol.2007.05.183 ↗
29. Comparative studies on effects of silica and titania nanoparticles on crystallization and complex segmental dynamics in poly(dimethylsiloxane)10.1016/j.polymer.2010.09.054 ↗
30. Block copolymer thermodynamics – theory and experiment10.1146/annurev.pc.41.100190.002521 ↗
31. Order–disorder transition in a block copolyurethane10.1021/ma00049a026 ↗
32. Die Rotgenkelinwinkelstreuung von dichgepackten kolloiden systemen. 110.1007/BF01512792 ↗
33. Böttger · 1985
34. Jonscher · 1996
35. Universality of ac conduction in disordered solids10.1103/RevModPhys.72.873 ↗
36. The random free-energy barrier model for ac conduction in disordered solids10.1063/1.341681 ↗