Low Density Rim Elastomers: a Study of Processing and Properties

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Abstract
This paper reports on the processing factors related to molding a high modulus RIM urethane elastomer at reduced density levels. Both unfilled and glass-reinforced ver sions of the high modulus elastomer were studied. As ex pected, key physical properties are lowered as density is reduced, with impact strength suffering the most. Overall, reduction in density seem to have less effect on the properties of the glass reinforced elastomer. The work concludes by stating that elastomers with reduced density levels and suffi cient enough stiffness-to-weight ratios can be made for many applications.

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