Raba wachilengedwe ndi polima wachilengedwe wokhala ndi polyisoprene monga gawo lalikulu.Mapangidwe ake a molekyulu ndi (C5H8)n.91% mpaka 94% ya zigawo zake ndi raba hydrocarbons (polyisoprene), ndipo ena onse ndi mapuloteni, Zinthu zosakhala mphira monga mafuta acids, phulusa, shuga, ndi zina zotero. Labala wachilengedwe ndi ...
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