As an important thermoplastic resin, polypropylene (PP) is widely used in many fields. According to its polymerization mode and structural characteristics, it is mainly divided into homopolymer polypropylene (PP-H), block (impact-resistant) copolymer polypropylene (PP-B) and random (random) copolymer polypropylene (Pp-r) .
Homopolymer polypropylène (PP-H) se polymerized soti nan yon sèl monomè propilèn . chèn molekilè li yo gen segondè regilarite ak segondè kristalinite, ki fè li gen bon fòs ak ekselan rezistans korozyon . sepandan, li tou te gen kèk ensifizans, tankou rezistans enpak pòv ak frajil teksti; pòv severite ak pòv estabilite dimansyon; Li se tou fasil a laj, gen pòv alontèm rezistans chalè ak estabilite, epi yo ka defòme nan anviwònman tanperati ki wo . li se souvan yo itilize nan pwodiksyon an nan strapping, kònen bòdi, bwòs, kòd, sache trikote ak lòt pwodwi .
Polypropylène copolymer blòk (pp-b) jwenn pa kopolimerizasyon nan propilèn ak yon pati nan ethylene {{1} Rezistans, rezistans solubility ak rezistans oksidasyon nan tanperati ki wo yo relativman pòv . Li se souvan yo itilize nan chok, pwodwi mens-ranpa byen, cha ti bebe, elatriye .
Random copolymer polypropylene (PP-R) is copolymerized by propylene monomer and a small amount of ethylene monomer. The random distribution of ethylene reduces the crystallinity and melting point of the polymer, bringing advantages of good comprehensive performance, such as high strength, high rigidity, good heat resistance, good dimensional stability, excellent low-temperature toughness, and Bon transparans ak enteprete . Li se souvan yo itilize nan pwodwi tankou tiyo, fim retresi, ak boutèy degoute .