Kukho iintlobo ezimbini eziphambili ze-polypropylene ezikhoyo: ii-homopolymers kunye nee-copolymers. Ii-copolymers zahlulwe ngakumbi zibe zii-block copolymers kunye nee-random copolymers.
Udidi ngalunye luhambelana ngcono nezinye izicelo. I-Polypropylene idla ngokubizwa ngokuba yi-"steel" yeshishini leplastiki ngenxa yeendlela ezahlukeneyo enokuthi iguqulwe okanye yenziwe ngokwezifiso ukuze ifeze injongo ethile.
Oku kudla ngokufezekiswa ngokuzisa izongezo ezikhethekileyo kuyo okanye ngokuyenza ngendlela ethile. Oku kuguquguquka luphawu olubalulekileyo.
I-polypropylene ye-homopolymerludidi oluqhelekileyo. Ungacinga ngale nto njengemeko eqhelekileyo yezinto ze-polypropylene.I-copolymer yebhlokoI-polypropylene ineeyunithi ze-co-monomer ezicwangciswe kwiibhloko (oko kukuthi, ngendlela eqhelekileyo) kwaye iqulethe naphi na phakathi kwe-5% ukuya kwi-15% ye-ethylene.
I-ethylene iphucula iipropati ezithile, njengokumelana neempembelelo ngelixa ezinye izongezo ziphucula ezinye iipropati.
I-copolymer engacwangciswangai-polypropylene – ngokungafaniyo ne-block copolymer polypropylene – ineeyunithi ze-co-monomer ezicwangciswe ngokweepateni ezingaqhelekanga okanye ezingacwangciswanga ecaleni kwemolekyuli ye-polypropylene.
Zidla ngokufakwa ne-ethylene ephakathi kwe-1% ukuya kwi-7% kwaye zikhethwa ukuba zisetyenziswe apho kufunwa imveliso ethambileyo necacileyo.
Ixesha lokuthumela: Disemba-05-2022