Umrežavanje Prirodnog Kaučuka Cross-linking of Natural Rubber
نویسنده
چکیده
Zahtjevi koji se postavljaju pred ploveće objekte nužno su doveli do primjene polimera kao konstrukcijskog materijala i kao suvremenog sustava zaštite u brodogradnji i pomorstvu. Prirodni kaučuk je poznat kao važan industrijski materijal koji se dobiva od drveta kaučukovca (Hevea brasiliensis). To je polimerni materijal, po kemijskom sastavu uglavnom cis 1,4-poliizopren, koji se ubraja u skupinu elastomera i zbog svojih specifičnih svojstava ima vrlo široku primjenu. Poznavanje njegove strukture (posebno nanostrukture gel faze) i molekulske dinamike vrlo je važno u određivanju mehaničkih i primjenskih svojstava. Prirodni se kaučuk, kao i sintetski elastomeri, mora podvrgnuti procesu umrežavanja pri čemu dolazi do poprečnog povezivanja lančastih molekula, a tim se postupkom dobivaju željena uporabna svojstva materijala. Tako pripravljen materijal odlikuje se odgovarajućom elastičnošću, prekidnom čvrstoćom, žilavošću i otpornošću na habanje.
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