According to the catalytic system, the technologies used by the world's shunding rubber production companies can be divided into five major systems: nickel, cobalt, lithium, titanium, and rare earth (neodymium).Titanium, nickel and cobalt system is the mainstream in elimination trend, rare earth system in the development stage, lithium is butadiene rubber is mainly used for production, impact polystyrene modifikesen bilong nikel butadien em i kantri bilong yumi long 1960 s gutpela divelopmen bilong ol hai aktiv nikel katalis, wanwan long 1965 long jinzhou, lanzhou, i stat long kamapim ol indastrial prodaksen, tasol ol i bin wokim ol nupela teknoloji long sampela jeneresen, bihain long hap bilong wanpela handet yia bilong wok bilong ol long mekim wok bilong ol long sampela jeneresen, spesel klas awod bilong wok bilong nesenel saiens na teknoloji i go het. tasol prodak kwaliti long wol advans level.
Ol mak bilong nikel katalitik sistem:
1. Nikel katalitik sistem em i wanpela multikomponen sistem. Dosis reshio, kaikai mod bilong ol katalis i no afektim wok bilong katalitik sistem tasol, tasol tu i afektim molekiul weit bilong polima{2}}
2, nikel katalis sistem stebiliti, polimeraisesen tempereja, blong adaptem i go long wan bigfala ranj, riaksen tempereja antap long 120 digri , sistem i no inaktivesen yet, i gat gudfala tempereja resistens.
3. Nikel katalitik sistem i gat gutpela dairektiviti na i no kisim bikpela bagarap long mak bilong katalis na konsentresen bilong monomer.
4. Nikel katalisis sistem i kamapim bikpela namba bilong sen trensfe bilong butadien long taim bilong polimeraisesen proses, na dispela i kamapim sen terminesen{1}}
Ol pasin bilong polimeraisesen bilong rare graun katalitik sistem:
1. Saturated haidrokabon heksan ol i yusim olsem solvent, we i gutpela long lukautim envairomen;
2. Hae monoma konvesen reit, iven kasem 100%;
3. I no isi long kamapim kros-linking riaksen na kamapim gel.