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pp raffia crusherfeldspar 1

Based on the hydroxylated polypropylene PP-OH polymer, a new family of polymeric stabilizers antioxidants containing a polypropylene backbone and several phenol groups PP-HP, with both random and tapered copolymer microstructures, is reported 111.PP-HP copolymers without H-bonding show much larger dielectric profile difference between tapered and random microstructures.