Dynamic mechanical properties for polyurethane elastomers applied in elastomeric mortar

2012 ◽  
Vol 126 (4) ◽  
pp. 1461-1467 ◽  
Author(s):  
José Atílio Fritz Fidel Rocco ◽  
José Eduardo Salgueiro Lima ◽  
Vera Lúcia Lourenço ◽  
Natássia Lona Batista ◽  
Edson Cocchieri Botelho ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Dynamic Mechanical Properties ◽  
Polyurethane Elastomers ◽  
Dynamic Mechanical

Influence of Diisocyanates on Dynamic Mechanical Properties of Castable Polyurethane Elastomers

2012 ◽  
Vol 217-219 ◽  
pp. 563-566
Author(s):  
Xiao Dong Chen ◽  
Yu Hua Yi
Keyword(s):  
Mechanical Properties ◽  
Dynamic Mechanical Analysis ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Toluene Diisocyanate ◽  
Diphenylmethane Diisocyanate ◽  
Analysis Method ◽  
Polyurethane Elastomers ◽  
Dynamic Mechanical ◽  
Soft Segments

A series of castable polyurethane elastomers, based on polytetramethylene glycol as soft segments and toluene diisocyanate, 4, 4’-diphenylmethane diisocyanate, P-phenylene diisocyanate as diisocyanates respectively, were synthesized. The dynamic mechanical analysis method was utilized to determine tan delta property (tanδ). Also the influence of diisocyanates on the dynamic mechanical properties of castable polyurethane elastomers was analyzed. It can be concluded that the P-phenylene diisocyanate system elastomers have the most excellent dynamic mechanical properties.

Effects of Hard Segment Contents on Dynamic Mechanical Properties of Gap-Based Polyurethane Elastomers

2013 ◽  
Vol 376 ◽  
pp. 125-129
Author(s):  
Hai Qin Ding ◽  
Le Qin Xiao ◽  
Wei Liang Zhou ◽  
Li Rong He ◽  
Huai Long Zhang
Keyword(s):  
Mechanical Properties ◽  
Hard Segment ◽  
Dynamic Mechanical Properties ◽  
Mechanical Analysis ◽  
Polyurethane Elastomers ◽  
Elongation At Break ◽  
Dynamic Mechanical ◽  
Soft Segments ◽  
Hard Segments ◽  
Fragility Parameter

Gap-based polyurethane elastomer (GAPE) with different hard segment contents are synthesized with 44-Diphenylmethane diisocyanate (MDI), 1,4 butylene glycol (BDO) as hard segments and GAP as soft segments. Dynamic mechanical analysis (DMA) is applied to investigated the dynamic mechanical properties and the mechanical properties of GAPE are studied by materials laboratorial instrument. The results show that GAPE-2 with 33 wt% hard segment has better mechanical properties, of which the tensile strength is 11.3MPa and elongation at break is 460.5%.As shown in DMA, T g of GAPE-2 is-18.4°C, and the low-temperature fragility parameter and activation energy of GAPE-2 are lower, 55.6 and 271.0 KJ·mol-1 respectively. Elastomer with good stiffness and flexibility is obtained.

Polyurethanes based on hydroxylated rapeseed oil: thermal and dynamic mechanical properties

2015 ◽  
Vol 37 (2) ◽  
pp. 162-167
Author(s):  
V.A. Vilensky ◽  
◽  
L.V. Kobrina ◽  
S.V. Riabov ◽  
Y.Y. Kercha ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Rapeseed Oil ◽  
Dynamic Mechanical Properties ◽  
Dynamic Mechanical
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