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(PDF Version - 122 K) Dangerously Reactive Materials are unstable or highly reactive materials that can undergo extremely hazardous uncontrolled reactions.They can cause explosions, fires or extreme heating, with potential for significant personal injury and property damage.
Polypropylene (PP) is a thermoplastic. It is a linear structure based on the monomer CnH2n. It is manufactured from propylene gas in presence of a catalyst such as titanium chloride.eside PP is a by-product of oil refining processes. Most polypropylene used is highly crystalline and geometrically regular (i.e. isotactic) opposite to amorphous thermoplastics, such as polystyrene, PVC, polyamide, etc., which radicals are placed radomly (i.e. atactic).