A modified polyurethane elastomer using polyfunctional HTPB synthesized by in-situ nitroxide mediated polymerization of 1,3-butadiene
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Hassan Rezaei Haghighat
und
Jalil Morshedian
Abstract
In-situ nitroxide mediated polymerization (NMP) of 1,3-butadiene was carried out in the presence of tetraethylenepentamine (TEPA) as a tri-functional nitroxide precursor, which furnished a high degree of hydroxy functionality. The multi-modal molar mass distribution of the product was elucidated by reductive hydrolyzation of the oligomeric product. The new polyfunctional hydroxyl-terminated polybutadiene (PFHTPB) was characterized and used in preparation of an HTPB-based polyurethane (PU). The effects of this new HTPB on mechanical and dynamic-mechanical properties of its corresponding polyurethane elastomer were studied. The mechanical and dynamic-mechanical characterization of the elastomer was evaluated by tensile and dynamic mechanical thermal analysis (DMTA) tests. A significant enhancement in mechanical properties of the elastomeric product with a small increase in the glass transition temperature was achieved using PFHTPB. In addition, there was a significant decrease in loss of the tangent value over the use of PFHTPB, compared to industrial HTPB, due to an efficient increase in crosslink density of the PFHTPB-based PU elastomer. The thermal stability of PFHTPB-based PU was comparable with its corresponding HTPB-based PU elastomer.
©2012 by Walter de Gruyter Berlin Boston
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Artikel in diesem Heft
- Masthead
- Masthead
- Review
- Influence of hydrostatic pressure and volumetric strain on the mechanical long term behavior of polymers
- Original Articles
- Dynamic pressure analysis as a tool for determination of sharkskin instability by extrusion of molten polymers
- Young’s modulus and prediction of plastics/elastomer blends
- Comparison of tribological performance of PEEK, UHMWPE, glass fiber reinforced PTFE and PTFE reinforced PEI composite materials under dry and lubricated conditions
- Study on the solidification kinetics of high-density polyethylene during thin-walled injection molding process
- The influence of level of interfacial healing on the weld-line strengths of injection molded parts
- Investigation on Nylon 66 silicate nanocomposites modified under gamma radiation
- Effect of mold surface antistiction treatment on microinjection replication quality using Cr-N/Zr-DLC thin-layer coating
- Estimation of thermal conductivity of PP/Al(OH)3/Mg(OH)2 composites
- Preparation and characterization of polyvinyl alcohol/carbon nanotube (PVA/CNT) conductive nanofibers
- Copolymerization of 5-norbornene-2-metheneoxy-trimethylsilyl with methyl 5-norbornene-2-carboxylate catalyzed by a novel Ni(benzocyclohexan-ketonaphthylimino)2/B(C6F5)3) system
- A modified polyurethane elastomer using polyfunctional HTPB synthesized by in-situ nitroxide mediated polymerization of 1,3-butadiene
- Preparation and characterizations of ternary biodegradable blends composed of polylactide, poly(ε-caprolactone), and wood flour
- Polypropylene + boehmite nanocomposite fibers
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