SEARCH Articles Figures Tables Efficiency of mastication of rubber at different temperatures. Molecular weights measured after 30-minute mastication of 200 g natural rubber in a size B laboratory Banbury [Publishers Imprint] [Publishers Imprint] See Also: Efficiency of mastication of rubber at different temperatures. Molecular weights measured after 30-minute mastication of 200 g natural rubber in a size B laboratory Banbury Efficiency of mastication of rubber at different temperatures. Molecular weights measured after 30-minute mastication of 200 g natural rubber in a size B laboratory Banbury