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Mastering the industry
08-02
2023
What is the chemical stability of polypropylene?
Polypropylene has good chemical stability. In addition to being eroded by concentrated sulfuric acid and nitric acid, it is relatively stable to other chemical reagents. However, low molecular weight aliphatic hydrocarbons, Aromatic hydrocarbon and chlorinated hydrocarbons can soften and swell polypropylene. At the same time, its chemical stability increases with the increase of crystallinity. Therefore, polypropylene is suitable for making various chemical pipes and fittings, with good anti-corrosion effect. It has a high dielectric coefficient and can be used to make heated electrical insulation products as the temperature increases. Its breakdown voltage is also very high, making it suitable for use as electrical accessories, etc. Good voltage and arc resistance, but high static electricity, easy to age when in contact with copper. Polypropylene is very sensitive to ultraviolet radiation, and the addition of zinc oxide, dimethyl thiodipropionate, carbon black, or similar milky white fillers can improve its aging resistance.
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Why should polypropylene be modified?
Modification is aimed at addressing the gap between the poor impact resistance, poor weather resistance, and flame retardancy of polypropylene at low temperatures and actual needs. Polypropylene is modified to further improve its material properties. It is worth noting that modification is to improve its inferior performance or enhance its original performance while maintaining its original advantages.
