Polimérisasi: Béda antarrépisi
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Baris ka-6:
Polimérisasi kondensasi lumangsung nalika monomér kabungkeut ngaliwatan [[réaksi kondensasi]]. Réaksi ieu bisa dihasilkeun ku jalan metakeun molekul-molekul nu ngandung gugus fungsi [[alkohol]], [[amina]], atawa [[asam karboxilat]] (atawa turunan karboxil séjénna). Nalika amina meta jeung asam karboxilat, bakal kawangun [[amida]] atawa beungkeut péptida, kalawan ngaleupaskeun cai (jadina polimérisasi ''kondensasi''). Nya ku prosés ieu asam-asam amino numbu sarta ngagabung jadi protéin, sakumaha dijieunna kevlar.
Sistim tumuwuh hambalan ranté-tumuwuh (Ing. ''chain growth-step growth system'') ngagolongkeun polimér dumasar mékanismena. Najan lolobana polimér kaasup kana golongan métode adisi-kondensasi, tapi aya sababaraha iwal.
Step growth polymers are defined as polymers formed by the stepwise reaction between functional groups of monomer. Most step growth polymers are also classified as condensation polymers, but not all step growth polymers (like polyurethanes formed from isocyanate and alcohol bifunctional monomers) release condensates. Step growth polymers increase in molecular weight at a very slow rate at lower conversions and only reach moderately high molecular weights at very high conversion (i.e. >95%).
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