Unprocessed plastic or polystyrene based porous solid materials in the form of powders, micro spheres and granules, used as adsorbents, catalysts, paper additives, separation devices, desiccants, molecular sieves, for purification and solid phase synthesis in the pharmaceutical, chemical, biochemical, microbiological, petrochemical, biological, biotechnological, photography and environmental industries; reagents for scientific or medical research use, namely, oligonucleotide-synthesis