High Quality Foams from NIR Latex

Abstract

Foam rubber properties have been measured for NIR latexes as a function of acrylonitrile content of the copolymer and as a function of ratio of NIR latex to NR latex and high modulus SBR latex. Foam rubber made from NIR latex had good aging and oil resistance, combined with the desirable high tensile strength and elongation characteristic of natural rubber foam. Resilience and low temperature flexibility of NIR foams were found to be lower than that achieved with foams of either SBR or NR latexes. Although compression modulus of NIR foam was lower than that of a high modulus SBR foam and approximately equivalent to that of NR foam, it was effectively increased by the addition of either such SBR latex or a high-styrene resin latex.

Morphology and mechanical and viscoelastic properties of natural rubber and styrene butadiene rubber latex blends

“…A detailed study on the technological difference between latices with different preservation systems was carried out by Angove. 10 Angove 11 further compared the advantages and disadvantages of the use of vulcanized latex blends in major manufacturing processes. Shundo et al 12 reported the relation between the properties and blend ratios of natural rubber and styrene butadiene rubber (SBR) blends in comparison with the blending techniques.…”

Elastomer Blends

“…Angove [3] has reviewed the field of latex blends with particular attention to processing, properties, and economics. More recently [6,7], Blackley and Charnock have investigated the viscosity and mechanical stability of NR/SBR latex blends, while King has attempted to improve their compatibility by modification of the stabilizing system [8].…”