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Papers by Keyword: Natural Rubber (NR)
Harvard researchers develop tough, self-healing rubber
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Abstract The effect of ammonia treatment in field natural rubber NR latex with different storage period time on the properties of concentrated NR latex and stability of skim latex was investigated. Fresh NR latex was treated with various ammonia contents such as 0. It was found that generally, magnesium content in field NR latex and latex concentrate decreased with storage period times. The alkalinity content in both concentrated NR and skim latex increased with increasing ammonia content in field latex.
A thermoplastic natural rubber TPNR is a material blended from a natural rubber NR and a thermoplastic, such as polypropylene, polystyrene, and high-density polyethylene HDPE [ 1 , 2 ]. Thus, it shows velvety surfaces and intermediate properties between the NR and the plastic, which provides flexibility in shaping, great recyclability of scrap, and low production cost [ 3 ]. Currently, the TPNR is still being developed for various applications such as in footwear, seals, hoses, automobiles, and marine engineering because the common thermoplastic machinery could be used without compounding or a vulcanization process [ 4 ]. However, due to the nature of the TPNR as a polymer, it has limitations in some physical and mechanical properties, particularly the stiffness and hardness.