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

Hai Qin Ding; Le Qin Xiao; Wei Liang Zhou; Li Rong He; Huai Long Zhang

doi:10.4028/www.scientific.net/AMM.376.125

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HomeApplied Mechanics and MaterialsApplied Mechanics and Materials Vol. 376Effects of Hard Segment Contents on Dynamic...

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

Abstract:

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.

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Periodical:

Applied Mechanics and Materials (Volume 376)

Pages:

125-129

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.376.125

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Online since:

August 2013

Authors:

Hai Qin Ding, Le Qin Xiao, Wei Liang Zhou, Li Rong He, Huai Long Zhang

Keywords:

Fractional Free Volume, Fragility Parameter, GaP, Hard Segment Contents, Mechanical Property

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