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  1. Polypropylene - Wikipedia

  2. Polypropylene (PP) - Types, Properties, Uses & Structure - Omnexus

  3. Polypropylene | Properties, Definition, & Uses | Britannica

  4. Polypropylene (PP) | What Is It, Types, Properties, and Uses

  5. Polypropylene (PP) Plastic: Types, Uses and Processing

  6. Find out What Polypropylene Is and What It's Used For

  7. What is Polypropylene (PP) ? – Properties, Types, Uses ... - ScrapC

  8. Polypropylene (PP): The Ultimate Material Guide

  9. All About Polypropylene: How it's Made and Used - Xometry

  10. Polypropylene Types: Chemistry, Properties, and Applications