Effect of the Number of Methylene Groups of Alcohol Chain Extender on Polyurethane Elastomer

doi:10.19491/j.issn.1001-9278.2011.09.006

Abstract

Abstract: A Polyurethane (PU) prepolymer was synthesized from 4,4 '- diphenylmethane diisocyanate (MDI) and polytetramethylene ether glycol (PTMG), from which PU elastomers were prepared with three-functional polyether polyols(330N) and different types of alcohol chain extender. Thermal and dynamic performance of the PU elastomers were characterized through DSC, TGA, DMTA, and mechanical properties testing. The effect of the number of methylene groups of alcohol chain extender on properties of PU elastomer was studied. It showed that the Tg and tanδ decreased, thermal stability and dynamic performance were enhanced ,tensile strength, elongation at break and hardness increased with increasing length of the alcohol chain extender.

Key words: elastomer, polyurethane, alcohol chain extender, thermal properties, dynamic mechanical performance

CLC Number:

TQ323.8

Hao JIN Jianxun LUO Lixin MAO Liqun ZHANG. Effect of the Number of Methylene Groups of Alcohol Chain Extender on Polyurethane Elastomer[J]. China Plastics, 2011, 25(09): 25-28 .

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Effect of the Number of Methylene Groups of Alcohol Chain Extender on Polyurethane Elastomer

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